CA2415096C - Orthopedic implant assembly - Google Patents
Orthopedic implant assembly Download PDFInfo
- Publication number
- CA2415096C CA2415096C CA002415096A CA2415096A CA2415096C CA 2415096 C CA2415096 C CA 2415096C CA 002415096 A CA002415096 A CA 002415096A CA 2415096 A CA2415096 A CA 2415096A CA 2415096 C CA2415096 C CA 2415096C
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- CA
- Canada
- Prior art keywords
- assembly
- component
- bore
- collar
- posterior
- Prior art date
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- Expired - Lifetime
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/80—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
- A61B17/8033—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates having indirect contact with screw heads, or having contact with screw heads maintained with the aid of additional components, e.g. nuts, wedges or head covers
- A61B17/8042—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates having indirect contact with screw heads, or having contact with screw heads maintained with the aid of additional components, e.g. nuts, wedges or head covers the additional component being a cover over the screw head
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/80—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
- A61B17/7059—Cortical plates
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/80—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
- A61B17/8052—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates immobilised relative to screws by interlocking form of the heads and plate holes, e.g. conical or threaded
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B17/8605—Heads, i.e. proximal ends projecting from bone
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
- A61F2002/30476—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism
- A61F2002/30495—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism using a locking ring
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2220/00—Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2220/0025—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
Abstract
An orthopedic implant assembly comprising a stabilizing element, a securing element which attaches the stabilizing element to the bone, and a stopping member in the stabilizing element which inhibits the securing element from loosening or backing out of the bone. The stabilizing element has at least one bore with the stopping member therein. In one embodiment, the stopping member has a reversibly expandable inner and outer diameter to allow the securing element to pass posteriorly through the stopping member, but thereafter prevent or inhibit the securing element from anteriorly backing out of the posterior section of the transverse passageway. In another embodiment, the stopping member is secured to an anterior section of the transverse passageway, and the head of the securing element generally has a compressed configuration with a diameter less than the diameter of the stopping member, in which configuration the head can pass through the stopping member, and an uncompressed configuration with a diameter larger than the diameter of the stopping member.
Description
2 PCT/US00/18446 ORTHOPEDIC IMPLANT ASSEMBLY
BACKGROUND OF THE INVENTION
This invention generally relates to the field of medical devices, and particularly to an orthopedic implant for joining bone segments and methods of use thereof.
A variety of medical conditions may necessitate the joining of bone segments toc~rether, as for example, in the treatment of broken bones, spinal disorders, or the fusion of vertebrae following the removal of a spinal disk. Orthopedic implants used to join bone segments include rods, plates, and screws. In the case of rods and plates, the implants have been attached to the bone using a variety of methods including cementing and screwing the implant to the bone.
The bone is typically drilled out to receive the screw therein, or to receive an anchor having a hollow shank which fixedly receives the screw therein. However, one disadvantage has been the tendency of the implants to loosen or detach from the bone over time.
It would be a significant advance to provide an orthopedic implant for joining bone segments together which durably and securely attaches to the bone.
SUMMARY OF THE INVENTION
This invention is directed to an orthopedic implant assembly generally comprising a stabilizing element, a securing element which attaches the stabilizing element to the patient's bone, and a stopping member in the stabilizing element which defines at least in part a passageway and which inhibits or prevents the securing element from loosening or backing out of the bone.
The stabilizing element is generally a plate or rod, which has at least one bore therein having a first opening in the anterior surface of the stabilizing element, a second opening in the posterior surface of the stabilizing element, and a transverse passageway extending from the first opening to the second opening. The term posterior should be understood to mean an inner portion of the assembly closer to the bone to which the assembly is attached, and the term anterior should be understood to mean an outer portion of the assembly farther away from the bone.
In one embodiment, the stopping member defines a reversibly expandable passageway, and is biased to the unexpanded, or smaller diameter, passageway configuration. In one embodiment, the biased stopping member comprises an annular collar having a reversibly expandable inner diameter. The biased stopping member may be configured to be positioned in a groove in the transverse passageway after the securing element is in place in the transverse passageway of the stabilizing element. Alternatively, in a presently preferred embodiment, the biased stopping member is configured to allow the securing element to pass posteriorly through the stopping member passageway from the anterior surface of the stabilizing element into a posterior section of the transverse passageway. In another embodiment, the biased stopping member is secured to the stabilizing element within the transverse passageway, and is deflectable. The deflectable stopping member reversibly flexes as the head of the securing element is posteriorly displaced through the deflectable stopping member to expand the passageway defined by the stopping member. The deflectable stopping member is biased to the undeflected or smaller diameter passageway configuration. The
BACKGROUND OF THE INVENTION
This invention generally relates to the field of medical devices, and particularly to an orthopedic implant for joining bone segments and methods of use thereof.
A variety of medical conditions may necessitate the joining of bone segments toc~rether, as for example, in the treatment of broken bones, spinal disorders, or the fusion of vertebrae following the removal of a spinal disk. Orthopedic implants used to join bone segments include rods, plates, and screws. In the case of rods and plates, the implants have been attached to the bone using a variety of methods including cementing and screwing the implant to the bone.
The bone is typically drilled out to receive the screw therein, or to receive an anchor having a hollow shank which fixedly receives the screw therein. However, one disadvantage has been the tendency of the implants to loosen or detach from the bone over time.
It would be a significant advance to provide an orthopedic implant for joining bone segments together which durably and securely attaches to the bone.
SUMMARY OF THE INVENTION
This invention is directed to an orthopedic implant assembly generally comprising a stabilizing element, a securing element which attaches the stabilizing element to the patient's bone, and a stopping member in the stabilizing element which defines at least in part a passageway and which inhibits or prevents the securing element from loosening or backing out of the bone.
The stabilizing element is generally a plate or rod, which has at least one bore therein having a first opening in the anterior surface of the stabilizing element, a second opening in the posterior surface of the stabilizing element, and a transverse passageway extending from the first opening to the second opening. The term posterior should be understood to mean an inner portion of the assembly closer to the bone to which the assembly is attached, and the term anterior should be understood to mean an outer portion of the assembly farther away from the bone.
In one embodiment, the stopping member defines a reversibly expandable passageway, and is biased to the unexpanded, or smaller diameter, passageway configuration. In one embodiment, the biased stopping member comprises an annular collar having a reversibly expandable inner diameter. The biased stopping member may be configured to be positioned in a groove in the transverse passageway after the securing element is in place in the transverse passageway of the stabilizing element. Alternatively, in a presently preferred embodiment, the biased stopping member is configured to allow the securing element to pass posteriorly through the stopping member passageway from the anterior surface of the stabilizing element into a posterior section of the transverse passageway. In another embodiment, the biased stopping member is secured to the stabilizing element within the transverse passageway, and is deflectable. The deflectable stopping member reversibly flexes as the head of the securing element is posteriorly displaced through the deflectable stopping member to expand the passageway defined by the stopping member. The deflectable stopping member is biased to the undeflected or smaller diameter passageway configuration. The
3 stopping member prevents the securing element from anteriorly backing out of the posterior section of the transverse passageway. As a result, the securing element durably attaches the stabilizing element to the bone.
The securing element is configured to attach to bone, and generally comprises an elongated body and a head at one end of the body and integral therewith. The term integral should be understood to mean the securing element is a one-piece unit, with the head secured to the body so that there is no relative movement between the head and the body. In one embodiment, the securing element is selected from the group consisting of screws, pins, and nails. In a presently preferred embodiment where the collar is seated within the groove in the stabilizing element before the securing element is advanced therein, the head of the securing element has a shaped posterior surface which contacts the collar and gradually expands the collar as the head is displaced into the posterior section of the transverse passageway of the stabilizing element. In a presently preferred embodiment, the head of the securing element has a curved posterior surface. However, other suitable shapes may be used including tapered posterior surfaces.
The invention also includes methods of attaching an orthopedic implant assembly to a bone of a patient. The bone is typically prepared for receiving the body of the securing element, as for example by drilling a cavity into the bone, and/or tapping the cavity. A
method generally comprises positioning the posterior surface of the stabilizing element against the surface of the bone, with the stopping member within the groove of the stabilizing element in the unexpanded configuration, introducing the body of the securing element into the WO 01/03592 CA 02415096 2002-12-30 pCT~S00/18446
The securing element is configured to attach to bone, and generally comprises an elongated body and a head at one end of the body and integral therewith. The term integral should be understood to mean the securing element is a one-piece unit, with the head secured to the body so that there is no relative movement between the head and the body. In one embodiment, the securing element is selected from the group consisting of screws, pins, and nails. In a presently preferred embodiment where the collar is seated within the groove in the stabilizing element before the securing element is advanced therein, the head of the securing element has a shaped posterior surface which contacts the collar and gradually expands the collar as the head is displaced into the posterior section of the transverse passageway of the stabilizing element. In a presently preferred embodiment, the head of the securing element has a curved posterior surface. However, other suitable shapes may be used including tapered posterior surfaces.
The invention also includes methods of attaching an orthopedic implant assembly to a bone of a patient. The bone is typically prepared for receiving the body of the securing element, as for example by drilling a cavity into the bone, and/or tapping the cavity. A
method generally comprises positioning the posterior surface of the stabilizing element against the surface of the bone, with the stopping member within the groove of the stabilizing element in the unexpanded configuration, introducing the body of the securing element into the WO 01/03592 CA 02415096 2002-12-30 pCT~S00/18446
4 transverse passageway, posteriorly displacing the head of the securing element through the stopping member and thereby expanding the stopping member, and attaching the stabilizing element to the bone by advancing the head of the securing element posteriorly of the stopping member so that the stopping member contracts and returns to a smaller transverse, i.e., unexpanded diameter, configuration. The head of the securing element is positioned within a posterior section of the transverse passageway between the stopping member and the second opening in the stabilizing element, and the body of the securing element is positioned within the patient's bone. In an alternative embodiment, the stopping member may be placed within the groove after the head of the securing element is positioned within the posterior section of the transverse passageway. The stabilizing element is attached to the bone by the securing element, which is attached to the bone and retained within the transverse passageway.
In another embodiment of the invention, the head of the securing element can be reversibly compressed, and the stopping member is secured to an anterior section of the transverse passageway. The stopping member defines a passageway with a fixed diameter, but the compressed configuration of the head of the securing element has a diameter less than the diameter of the stopping member so that the head can pass through the stopping member passageway. In the uncompressed configuration, the head of the securing element has a diameter larger than the diameter of the stopping member and the diameter of the second opening in the stabilizing element, so that the head can be advanced posteriorly of the stopping member and retained within the transverse passageway between the stopping member and the second opening.
WO 01/03592 CA 02415096 2002-12-30 pCT/US00/18446 To facilitate the correct placement of the orthopedic implant assembly on the bone, the transverse passageway between the collar and the second opening in the stabilizing element may be configured so that the securing element may be angularly displaceable therein and
In another embodiment of the invention, the head of the securing element can be reversibly compressed, and the stopping member is secured to an anterior section of the transverse passageway. The stopping member defines a passageway with a fixed diameter, but the compressed configuration of the head of the securing element has a diameter less than the diameter of the stopping member so that the head can pass through the stopping member passageway. In the uncompressed configuration, the head of the securing element has a diameter larger than the diameter of the stopping member and the diameter of the second opening in the stabilizing element, so that the head can be advanced posteriorly of the stopping member and retained within the transverse passageway between the stopping member and the second opening.
WO 01/03592 CA 02415096 2002-12-30 pCT/US00/18446 To facilitate the correct placement of the orthopedic implant assembly on the bone, the transverse passageway between the collar and the second opening in the stabilizing element may be configured so that the securing element may be angularly displaceable therein and
5 the body of the securing element may be positioned at an angle within the patient's bone.
In the assembly of the invention, the securing element is prevented from backing out of the bone by the interaction of the securing element head and the stopping member. As a result, a separate anchor means implanted in the bone to receive the screw is not required, and the resulting loss of bone and intraoperative time required to implant the anchor is avoided. Moreover, in a preferred embodiment, the stopping member is within the transverse passageway at the beginning of the procedure, so that the surgeon can attach the implant assembly to the bone with the single motion of advancing the securing element through the stopping member passageway and into the bone. The implant assembly of the invention thus reduces the time required to attach the assembly to the bone and provides improved implant performance.
The orthopedic implant assembly of the invention can be durably attached to bone, and the securing element prevented from significantly backing out of the bone due to the head of the securing element being retained within the stabilizing element. These and other advantages of the invention will become more apparent from the following detailed description of the invention and the accompanying exemplary drawings.
In the assembly of the invention, the securing element is prevented from backing out of the bone by the interaction of the securing element head and the stopping member. As a result, a separate anchor means implanted in the bone to receive the screw is not required, and the resulting loss of bone and intraoperative time required to implant the anchor is avoided. Moreover, in a preferred embodiment, the stopping member is within the transverse passageway at the beginning of the procedure, so that the surgeon can attach the implant assembly to the bone with the single motion of advancing the securing element through the stopping member passageway and into the bone. The implant assembly of the invention thus reduces the time required to attach the assembly to the bone and provides improved implant performance.
The orthopedic implant assembly of the invention can be durably attached to bone, and the securing element prevented from significantly backing out of the bone due to the head of the securing element being retained within the stabilizing element. These and other advantages of the invention will become more apparent from the following detailed description of the invention and the accompanying exemplary drawings.
6 BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is an elevational view of an orthopedic implant assembly which embodies features of the invention.
Fig. 2 is an exploded view, partially in section, of the orthopedic implant assembly shown in Fig. 1 .
Fig. 3 is a cross section of the orthopedic implant assembly shown in Fig. 1 taken along lines 3-3.
Fig. 3A is a transverse cross section of the orthopedic implant assembly shown in Fig. 3 taken along lines 3A-3A.
Fig. 4 illustrates the orthopedic implant assembly shown in Fig.
3, as the securing element is being advanced into the patient's bone.
Fig. 4A is a transverse cross section of the assembly shown in Fig. 4, taken along lines 4A-4A.
Fig. 5 illustrates the orthopedic implant assembly shown in Fig.
3, with the securing element advanced into the posterior section of the transverse passageway of the stabilizing element.
Fig. 6 illustrates the orthopedic implant assembly shown in Fig.
3, with the securing element angularly disposed within the patient's bone.
Fig. 7 is an exploded view, partially in section, of an orthopedic implant assembly having a securing element with a compressible head, which embodies features of the invention.
Fig. 8 illustrates the orthopedic implant assembly shown in Fig.
Fig. 1 is an elevational view of an orthopedic implant assembly which embodies features of the invention.
Fig. 2 is an exploded view, partially in section, of the orthopedic implant assembly shown in Fig. 1 .
Fig. 3 is a cross section of the orthopedic implant assembly shown in Fig. 1 taken along lines 3-3.
Fig. 3A is a transverse cross section of the orthopedic implant assembly shown in Fig. 3 taken along lines 3A-3A.
Fig. 4 illustrates the orthopedic implant assembly shown in Fig.
3, as the securing element is being advanced into the patient's bone.
Fig. 4A is a transverse cross section of the assembly shown in Fig. 4, taken along lines 4A-4A.
Fig. 5 illustrates the orthopedic implant assembly shown in Fig.
3, with the securing element advanced into the posterior section of the transverse passageway of the stabilizing element.
Fig. 6 illustrates the orthopedic implant assembly shown in Fig.
3, with the securing element angularly disposed within the patient's bone.
Fig. 7 is an exploded view, partially in section, of an orthopedic implant assembly having a securing element with a compressible head, which embodies features of the invention.
Fig. 8 illustrates the orthopedic implant assembly shown in Fig.
7 as the securing element is being advanced into the patient's bone.
Figs. 9 is a transverse cross section of the assembly shown in Fig. 8, taken along lines 9-9.
Fig. 10 illustrates the orthopedic implant assembly shown in Fig.
7 with the securing element advanced into the posterior section of the transverse passageway of the stabilizing element.
Figs. 1 1 is a transverse cross section of the assembly shown in Fig. 10, taken along lines 1 1-1 1.
Fig. 12 illustrates the orthopedic implant assembly shown in Fig.
7, with the securing element angularly disposed within the patient's bone.
Fig. 13 is an exploded view, partially in section, of an orthopedic implant assembly having a deflectable stopping member, which embodies features of the invention.
Fig. 14 illustrates the orthopedic implant assembly shown in Fig.
13 with the securing element advanced into the posterior section of the transverse passageway of the stabilizing element.
Figs. 15 is a plan view of the assembly shown in Fig. 14, taken along lines 15-15.
DETAILED DESCRIPTION OF THE INVENTION
Fig. 1 illustrates one embodiment of the orthopedic implant assembly 10 of the invention, generally including a stabilizing element 1 1, with a biased stopping member 12 in a bore 13 therein, and a securing element 14, configured for securing to a patient's bone 15.
In the embodiment illustrated in Fig. 1, the biased stopping member comprises an annular collar, although a variety of suitable members may be used, as for example, one or more contractible fingers biased to extend into the transverse passageway (not shown).
As best illustrated in Fig. 2 showing an exploded, partially in section, view of the assembly shown in Fig. 1, the bore 13 of the
Figs. 9 is a transverse cross section of the assembly shown in Fig. 8, taken along lines 9-9.
Fig. 10 illustrates the orthopedic implant assembly shown in Fig.
7 with the securing element advanced into the posterior section of the transverse passageway of the stabilizing element.
Figs. 1 1 is a transverse cross section of the assembly shown in Fig. 10, taken along lines 1 1-1 1.
Fig. 12 illustrates the orthopedic implant assembly shown in Fig.
7, with the securing element angularly disposed within the patient's bone.
Fig. 13 is an exploded view, partially in section, of an orthopedic implant assembly having a deflectable stopping member, which embodies features of the invention.
Fig. 14 illustrates the orthopedic implant assembly shown in Fig.
13 with the securing element advanced into the posterior section of the transverse passageway of the stabilizing element.
Figs. 15 is a plan view of the assembly shown in Fig. 14, taken along lines 15-15.
DETAILED DESCRIPTION OF THE INVENTION
Fig. 1 illustrates one embodiment of the orthopedic implant assembly 10 of the invention, generally including a stabilizing element 1 1, with a biased stopping member 12 in a bore 13 therein, and a securing element 14, configured for securing to a patient's bone 15.
In the embodiment illustrated in Fig. 1, the biased stopping member comprises an annular collar, although a variety of suitable members may be used, as for example, one or more contractible fingers biased to extend into the transverse passageway (not shown).
As best illustrated in Fig. 2 showing an exploded, partially in section, view of the assembly shown in Fig. 1, the bore 13 of the
8 stabilizing element has a first opening 16 in an anterior surface of the stabilizing element, a second opening 17 in a posterior surface of the stabilizing element, a transverse passageway 18 extending therein, and a groove 21 in an anterior portion of the transverse passageway.
Annular collar 12 defines a passageway 22, and is configured to be seated within the groove 21, and has a reversibly expandable inner and outer diameter. As illustrated in Fig. 3, illustrating the assembly shown in Fig. 1 partially in section taken along lines 3-3, and Fig. 3A
illustrating a transverse cross sectional view of the assembly shown in Fig. 3 taken along lines 3A-3A, the annular collar 12 is biased to an unexpended outer diameter which is less than the diameter of the groove and greater than the diameter of the transverse passageway, so that the collar seats within the groove. The expanded outer diameter of the collar is less than the diameter of the groove, and the height of the collar is less than the height of the groove, so that the collar can be expanded therein.
The securing element 14 has an elongated body 23 and an integral head 24 secured to one end of the body 23. In a presently preferred embodiment of the invention illustrated in Fig. 1, the securing element comprises a screw. The head of the securing element is configured to be posteriorly displaceable through the passageway 22 of the collar seated within the groove, from an anterior to a posterior surface of the collar, and retained within a posterior section 25 of the transverse passageway 18 between the posterior surface of the collar 12 and the second, i.e., posterior, opening 17 in the stabilizing element. In the embodiment illustrated in Fig. 1, the head of the securing element has a curved posterior surface 26 with a convex shape and with a smaller diameter than an anterior WO 01/03592 CA 02415096 2002-12-30 pCT~S00/18446
Annular collar 12 defines a passageway 22, and is configured to be seated within the groove 21, and has a reversibly expandable inner and outer diameter. As illustrated in Fig. 3, illustrating the assembly shown in Fig. 1 partially in section taken along lines 3-3, and Fig. 3A
illustrating a transverse cross sectional view of the assembly shown in Fig. 3 taken along lines 3A-3A, the annular collar 12 is biased to an unexpended outer diameter which is less than the diameter of the groove and greater than the diameter of the transverse passageway, so that the collar seats within the groove. The expanded outer diameter of the collar is less than the diameter of the groove, and the height of the collar is less than the height of the groove, so that the collar can be expanded therein.
The securing element 14 has an elongated body 23 and an integral head 24 secured to one end of the body 23. In a presently preferred embodiment of the invention illustrated in Fig. 1, the securing element comprises a screw. The head of the securing element is configured to be posteriorly displaceable through the passageway 22 of the collar seated within the groove, from an anterior to a posterior surface of the collar, and retained within a posterior section 25 of the transverse passageway 18 between the posterior surface of the collar 12 and the second, i.e., posterior, opening 17 in the stabilizing element. In the embodiment illustrated in Fig. 1, the head of the securing element has a curved posterior surface 26 with a convex shape and with a smaller diameter than an anterior WO 01/03592 CA 02415096 2002-12-30 pCT~S00/18446
9 surface of the head. The curved posterior surface 26 has a minimum outer diameter which is smaller than the unexpended inner diameter of the collar, and which is positionable within the passageway of the collar, to contact and expand the collar as the head is displaced posteriorly therein.
Figs. 3-5 illustrate the attachment of the assembly to the patient's bone. As illustrated in Fig. 3, the stabilizing element is positioned against a surface of a bone 15, and the posterior end of the body of the securing element 14 is placed within the stabilizing element transverse passageway. The head 24 of the securing element is posteriorly advanced within the passageway 22 of the collar 12, thereby applying a radially expanding force against an inner surface of the collar to expand the inner diameter of the collar, as illustrated in Fig. 4 showing the expanded collar and the head of the securing element partially displaced through the collar passageway. Arrows in Fig. 4 illustrate the expansion of the collar as the head of the securing element is passed therethrough. Fig. 4A illustrates a transverse cross section of the assembly shown in Fig. 4; taken along lines 4A-4A.
The expanded inner diameter of the collar is therefore larger than the maximum diameter of the head of the securing element, to allow the head of the securing element to pass posteriorly through the collar.
The head of the securing element is advanced posteriorly of the collar and into the posterior section 25 of the transverse passageway, so that the collar returns to the unexpended configuration having an unexpended inner diameter smaller than the maximum diameter of the head of the securing element, as illustrated in Fig. 5. In the embodiment illustrated in Fig. 5, the flat anterior surface of the head of the securing element has a diameter which is larger than the unexpanded inner diameter of the collar, and the posterior surface of the collar is perpendicular to the longitudinal axis of the transverse passageway. Thus, the anterior surface of the head will butt up against the posterior surface of the collar without expanding the collar, 5 to prevent the securing element from being anteriorly displaced out of the posterior section of the transverse passageway. In the embodiment illustrated in the Fig. 5, a posterior portion of the transverse passageway is curved to conform to the curved posterior surface of the head, providing maximum contact between the securing
Figs. 3-5 illustrate the attachment of the assembly to the patient's bone. As illustrated in Fig. 3, the stabilizing element is positioned against a surface of a bone 15, and the posterior end of the body of the securing element 14 is placed within the stabilizing element transverse passageway. The head 24 of the securing element is posteriorly advanced within the passageway 22 of the collar 12, thereby applying a radially expanding force against an inner surface of the collar to expand the inner diameter of the collar, as illustrated in Fig. 4 showing the expanded collar and the head of the securing element partially displaced through the collar passageway. Arrows in Fig. 4 illustrate the expansion of the collar as the head of the securing element is passed therethrough. Fig. 4A illustrates a transverse cross section of the assembly shown in Fig. 4; taken along lines 4A-4A.
The expanded inner diameter of the collar is therefore larger than the maximum diameter of the head of the securing element, to allow the head of the securing element to pass posteriorly through the collar.
The head of the securing element is advanced posteriorly of the collar and into the posterior section 25 of the transverse passageway, so that the collar returns to the unexpended configuration having an unexpended inner diameter smaller than the maximum diameter of the head of the securing element, as illustrated in Fig. 5. In the embodiment illustrated in Fig. 5, the flat anterior surface of the head of the securing element has a diameter which is larger than the unexpanded inner diameter of the collar, and the posterior surface of the collar is perpendicular to the longitudinal axis of the transverse passageway. Thus, the anterior surface of the head will butt up against the posterior surface of the collar without expanding the collar, 5 to prevent the securing element from being anteriorly displaced out of the posterior section of the transverse passageway. In the embodiment illustrated in the Fig. 5, a posterior portion of the transverse passageway is curved to conform to the curved posterior surface of the head, providing maximum contact between the securing
10 element and the stabilizing element. The curved surfaces of the posterior portion of the transverse passageway and the posterior surface of the head have the same radius of curvature, and the diameter of the curved surface of the head is large enough so that the wall defining the transverse passageway contacts the head around the circumference of the curved posterior surface of the head, but is small enough so that the head can be displaced within the transverse passageway. With the head of the securing element positioned within the posterior section 25 of the transverse passageway, the body of the securing element is embedded in, and secured to, the bone of the patient.
In the embodiment illustrated in Fig. 5, the posterior section 25 of the transverse passageway is sufficiently longer than the head 24 of the securing element so that the head can be displaced anteriorly and posteriorly, and is thus longitudinally displaceable within the posterior section of the transverse passageway. Additionally, the body of the securing element 23 has a smaller diameter than the diameter of the second opening 17 in the stabilizing element, and can be displaced from side to side, i.e., medial-lateral displacement, within
In the embodiment illustrated in Fig. 5, the posterior section 25 of the transverse passageway is sufficiently longer than the head 24 of the securing element so that the head can be displaced anteriorly and posteriorly, and is thus longitudinally displaceable within the posterior section of the transverse passageway. Additionally, the body of the securing element 23 has a smaller diameter than the diameter of the second opening 17 in the stabilizing element, and can be displaced from side to side, i.e., medial-lateral displacement, within
11 the second opening 17. As a result, the securing element is angularly displaceable within the transverse passageway posterior section 25 between the collar 12 and the second opening 17 in the stabilizing element, as illustrated in Fig. 6. The securing element can thus be tilted within the transverse passageway at an angle relative to the transverse passageway longitudinal axis, to facilitate positioning the securing element at a desired location in the bone by advancing the body of the securing element within the bone at an angle relative to the surface of the bone. The securing element can be angularly displaced up to an angle of about 45°, preferably up to about 20°
relative the longitudinal axis of the transverse passageway.
The stopping member 12 is preferably elastically deformable, and formed of titanium, and superelastic or pseudoelastic materials such as NiTi alloys. The unexpended inner diameter of the stopping member is about 0.1 to about 40 mm, preferably about 0.5 to about mm, and is about 0.05 to about 20 mm, preferably about 0.1 to about 15 mm less than the maximum transverse dimension of the head of the securing element. The unexpended outer diameter of the stopping member is about 0.2 to about 50 mm, preferably about 1.0 20 to about 30 mm. The expanded inner diameter of the stopping member is about 0.15 to about 50 mm, preferably about 0.75 to about 30 mm, and the expanded outer diameter of the stopping member is about 0.5 to about 60 mm, preferably about 1.5 to about 40 mm. The height of the stopping member is about 0.01 to about 5 mm, preferably about 0.05 to about 3 mm.
Figs. 7-12 illustrate another embodiment of the invention, generally comprising a securing element 30, and a stabilizing element 31 similar to the stabilizing element in the embodiment illustrated in W~ 01/03592 CA 02415096 2002-12-30 pCT/C1S00/18446
relative the longitudinal axis of the transverse passageway.
The stopping member 12 is preferably elastically deformable, and formed of titanium, and superelastic or pseudoelastic materials such as NiTi alloys. The unexpended inner diameter of the stopping member is about 0.1 to about 40 mm, preferably about 0.5 to about mm, and is about 0.05 to about 20 mm, preferably about 0.1 to about 15 mm less than the maximum transverse dimension of the head of the securing element. The unexpended outer diameter of the stopping member is about 0.2 to about 50 mm, preferably about 1.0 20 to about 30 mm. The expanded inner diameter of the stopping member is about 0.15 to about 50 mm, preferably about 0.75 to about 30 mm, and the expanded outer diameter of the stopping member is about 0.5 to about 60 mm, preferably about 1.5 to about 40 mm. The height of the stopping member is about 0.01 to about 5 mm, preferably about 0.05 to about 3 mm.
Figs. 7-12 illustrate another embodiment of the invention, generally comprising a securing element 30, and a stabilizing element 31 similar to the stabilizing element in the embodiment illustrated in W~ 01/03592 CA 02415096 2002-12-30 pCT/C1S00/18446
12 Fig. 1, except the stopping member is not seated within a groove in the transverse passageway 18. Instead, a stopping member 32 is provided at an anterior section of the transverse passageway, which may be formed integrally with the stabilizing element or as a separate member secured thereto. In the embodiment illustrated in Fig. 7, the stopping member is a collar at the anterior end of the transverse passageway and defining the first opening 16 in the stabilizing element 31 . The securing element 30 has an elongated body 33, and head 34 secured to one end of the body having a compressed configuration and an uncompressed configuration. In the embodiment illustrated in Fig.
7, the head has a plurality of slots 35 defining circumferentially spaced members 36 having posterior ends secured to the body of the securing element. The circumferentially spaced members 36 have anterior ends radially moveable toward a longitudinal axis of the head to form the compressed configuration, having a diameter less than the inner diameter of the collar. Fig. 8 illustrates the head of the securing element in the compressed configuration within the passageway defined by the collar. Fig. 9 illustrates a transverse cross sectional view of the assembly shown in Fig. 8, taken along lines 9-9. Fig. 10 illustrates the head of the securing element advanced posteriorly of the collar and into the posterior section of the transverse passageway, thereby returning the circumferentially spaced members 36 to the uncompressed configuration by release of the radially compressive force of the collar. Fig. 1 1 illustrates a transverse cross section of the assembly shown in Fig. 10, taken along lines 11-11, with the first opening 16 shown in phantom. The securing element is angularly and longitudinally displaceable within the transverse passageway posterior WO 01/03592 CA 02415096 2002-12-30 pCT/US00/18446
7, the head has a plurality of slots 35 defining circumferentially spaced members 36 having posterior ends secured to the body of the securing element. The circumferentially spaced members 36 have anterior ends radially moveable toward a longitudinal axis of the head to form the compressed configuration, having a diameter less than the inner diameter of the collar. Fig. 8 illustrates the head of the securing element in the compressed configuration within the passageway defined by the collar. Fig. 9 illustrates a transverse cross sectional view of the assembly shown in Fig. 8, taken along lines 9-9. Fig. 10 illustrates the head of the securing element advanced posteriorly of the collar and into the posterior section of the transverse passageway, thereby returning the circumferentially spaced members 36 to the uncompressed configuration by release of the radially compressive force of the collar. Fig. 1 1 illustrates a transverse cross section of the assembly shown in Fig. 10, taken along lines 11-11, with the first opening 16 shown in phantom. The securing element is angularly and longitudinally displaceable within the transverse passageway posterior WO 01/03592 CA 02415096 2002-12-30 pCT/US00/18446
13 section 25, as discussed above with regard to the embodiment illustrated in Fig. 1, and as illustrated in Fig. 12.
Figs. 13-15 illustrate another embodiment of the invention, generally comprising a stabilizing element 41 similar to the stabilizing element in the embodiment illustrated in Fig. 1, except with a deflectable stopping member 42 provided in an anterior section of the transverse passageway, which may be formed integrally with the stabilizing element or as a separate member secured thereto. In the embodiment illustrated in Fig. 13, the stopping member comprises a collar 42 having a plurality of slots 43 defining circumferentially spaced members 44 and a tapered or sloping anterior surface providing axial flexibility in a posterior direction, so that the collar deflects posteriorly when the head of the securing element is posteriorly displaced through the collar. As a result, the circumferentially spaced members 44 have a wedge shape and a height which tapers towards the central passageway 45 defined by the collar, which facilitates displacing the head of the securing element therethrough and reversibly enlarging the passageway 45. In the embodiment illustrated in Fig. 13, the collar is integrally formed with the stabilizing element 41 at the anterior end of the transverse passageway, and defines the first opening 16 in the stabilizing element 41. The securing element may be the same as, or similar to, the securing element 14 discussed above in connection with the embodiment illustrated in Fig. 1, and as illustrated in Fig. 13. However, securing element 30 having head 34 with a compressed configuration and an uncompressed configuration, as discussed above in connection with the embodiment illustrated in Fig. 7, may also be used. Fig. 15 illustrates a plan view of the assembly shown in Fig. 14, taken along lines 15-15, with the head of
Figs. 13-15 illustrate another embodiment of the invention, generally comprising a stabilizing element 41 similar to the stabilizing element in the embodiment illustrated in Fig. 1, except with a deflectable stopping member 42 provided in an anterior section of the transverse passageway, which may be formed integrally with the stabilizing element or as a separate member secured thereto. In the embodiment illustrated in Fig. 13, the stopping member comprises a collar 42 having a plurality of slots 43 defining circumferentially spaced members 44 and a tapered or sloping anterior surface providing axial flexibility in a posterior direction, so that the collar deflects posteriorly when the head of the securing element is posteriorly displaced through the collar. As a result, the circumferentially spaced members 44 have a wedge shape and a height which tapers towards the central passageway 45 defined by the collar, which facilitates displacing the head of the securing element therethrough and reversibly enlarging the passageway 45. In the embodiment illustrated in Fig. 13, the collar is integrally formed with the stabilizing element 41 at the anterior end of the transverse passageway, and defines the first opening 16 in the stabilizing element 41. The securing element may be the same as, or similar to, the securing element 14 discussed above in connection with the embodiment illustrated in Fig. 1, and as illustrated in Fig. 13. However, securing element 30 having head 34 with a compressed configuration and an uncompressed configuration, as discussed above in connection with the embodiment illustrated in Fig. 7, may also be used. Fig. 15 illustrates a plan view of the assembly shown in Fig. 14, taken along lines 15-15, with the head of
14 the securing element 14 partially in phantom. The angular and longitudinal displacement of the securing member in the posterior section 25 of the transverse passageway is as discussed above.
The stabilizing element is preferably formed of a metal such as titanium or stainless steel. The length of the stabilizing element is typically about 7 to about 300 mm, preferably about 13 to about 200 mm, and the width of the stabilizing element is typically about 5 to about 50 mm, preferably about 10 to about 30 mm. The height of the stabilizing element is typically about 0.5 to about 10 mm, preferably about 1.0 to about 6.0 mm although the dimensions of the stabilizing element will vary depending on the application for which the assembly is to be used.
The securing element is preferably formed of a metal, such as titanium or stainless steel. The head of the securing element is configured, as for example with a hexagonal opening, for releasable connection to a tool for advancing the securing element into the bone.
The body of the securing element has a length of about 2 to about 50 mm, preferably about 5 to about 20 mm, and the head of the securing element has a length of about 0.05 to about 1.5 mm, preferably about 0.5 to about 1.0 mm. One skilled in the art will recognize that a variety of suitable securing elements may be used, which may be optimized for use in a particular orthopedic environment, as is well known in the art. For example, a high thread pitch may be used to limit screw back out from bone.
The assembly of the invention is suitable for use in a variety of medical procedures, including securing fractured bone segments or vertebrae following disk removal. In the illustrated embodiments, the stabilizing element comprises a plate, although other suitable elements such as rods may be used. Additionally, the stabilizing element may be shaped to conform to the surface of the bone or bones to which it will be attached. For example, a presently preferred embodiment of the stabilizing element comprises a plate with a concave posterior 5 surface, and is configured for attaching to vertebrae.
While the present invention has been described herein in terms of certain preferred embodiments, those skilled in the art will recognize that modifications and improvements may be made without departing from the scope of the invention. For example, while the stopping 10 member is discussed primarily in terms of a collar, other configurations may also be used. Additionally, while a particular feature may be discussed in connection with one embodiment, it should be understood that features of one embodiment may be used with the other embodiments herein.
The stabilizing element is preferably formed of a metal such as titanium or stainless steel. The length of the stabilizing element is typically about 7 to about 300 mm, preferably about 13 to about 200 mm, and the width of the stabilizing element is typically about 5 to about 50 mm, preferably about 10 to about 30 mm. The height of the stabilizing element is typically about 0.5 to about 10 mm, preferably about 1.0 to about 6.0 mm although the dimensions of the stabilizing element will vary depending on the application for which the assembly is to be used.
The securing element is preferably formed of a metal, such as titanium or stainless steel. The head of the securing element is configured, as for example with a hexagonal opening, for releasable connection to a tool for advancing the securing element into the bone.
The body of the securing element has a length of about 2 to about 50 mm, preferably about 5 to about 20 mm, and the head of the securing element has a length of about 0.05 to about 1.5 mm, preferably about 0.5 to about 1.0 mm. One skilled in the art will recognize that a variety of suitable securing elements may be used, which may be optimized for use in a particular orthopedic environment, as is well known in the art. For example, a high thread pitch may be used to limit screw back out from bone.
The assembly of the invention is suitable for use in a variety of medical procedures, including securing fractured bone segments or vertebrae following disk removal. In the illustrated embodiments, the stabilizing element comprises a plate, although other suitable elements such as rods may be used. Additionally, the stabilizing element may be shaped to conform to the surface of the bone or bones to which it will be attached. For example, a presently preferred embodiment of the stabilizing element comprises a plate with a concave posterior 5 surface, and is configured for attaching to vertebrae.
While the present invention has been described herein in terms of certain preferred embodiments, those skilled in the art will recognize that modifications and improvements may be made without departing from the scope of the invention. For example, while the stopping 10 member is discussed primarily in terms of a collar, other configurations may also be used. Additionally, while a particular feature may be discussed in connection with one embodiment, it should be understood that features of one embodiment may be used with the other embodiments herein.
Claims (87)
1. An orthopedic implant assembly, comprising a) a stabilizing element having an anterior surface, a posterior surface, and at least one bore, the bore having a first opening in the anterior surface, a second opening in the posterior surface smaller than the first opening, and a transverse passageway extending from the first opening to the second opening;
b) a biased stopping member defining at least in part a reversibly expandable passageway having a smaller diameter configuration and a larger diameter configuration; and c) a securing element having an elongated body, and a head at or-e end of the body and integral therewith, the head having a maximum diameter greater than the smaller diameter configuration of the passageway defined by the biased stopping member and greater than the second opening in the stabilizing element, so that the head is retained within the transverse passageway between the biased stopping member and the second opening in the stabilizing element.
b) a biased stopping member defining at least in part a reversibly expandable passageway having a smaller diameter configuration and a larger diameter configuration; and c) a securing element having an elongated body, and a head at or-e end of the body and integral therewith, the head having a maximum diameter greater than the smaller diameter configuration of the passageway defined by the biased stopping member and greater than the second opening in the stabilizing element, so that the head is retained within the transverse passageway between the biased stopping member and the second opening in the stabilizing element.
2. The assembly of claim 1 wherein the biased stopping member comprises a collar defining a passageway, enlargeable from an unexpanded inner diameter to an expanded inner diameter, wherein the head of the securing element has a maximum diameter greater thaw the unexpanded inner diameter of the collar and less than the expanded inner diameter of the collar.
3. The assembly of claim 2 wherein the head of the securing element has a curved posterior surface which has a minimum outer diameter smaller than the unexpanded inner diameter of the collar, configured to be displaceable posteriorly of the collar, through the passageway of the collar from an anterior to a posterior surface thereof.
4. The assembly of claim 2 wherein the bore has a groove in an anterior portion of the transverse passageway having a diameter and a height, and wherein the collar is a reversibly expandable annular collar seated in the groove, the collar having an expanded outer diameter, and an unexpanded outer diameter which is less than the diameter of the groove and greater than a diameter of the transverse passageway.
5. The assembly of claim 4 wherein the head of the securing element has a curved posterior surface which has a minimum outer diameter smaller than the unexpanded inner diameter of the collar, and which is configured to contact the collar anterior surface and expand the collar as the head is displaced posteriorly through the collar passageway.
6. The assembly of claim 2 wherein the collar is secured to an anterior section of the transverse passageway, and has a plurality of slots and circumferentially spaced members, the circumferentially spaced members having a deflected configuration defining the expanded inner diameter of the collar.
7. The assembly of claim 6 wherein the head of the securing element has a curved posterior surface which has a minimum outer diameter smaller than the unexpanded inner diameter of the collar, and which is configured to contact the collar anterior surface and deflect the circumferentially spaced members away from a longitudinal axis of the transverse passageway as the head is displaced posteriorly through the collar passageway.
8. The assembly of claim 6 wherein the collar has an anterior surface which tapers toward a center of the transverse passageway.
9. The assembly of claim 3 wherein a posterior portion of the transverse passageway is curved to conform to the curved posterior surface of the head.
10. The assembly of claim 1 wherein the head of the securing element is longitudinally displaceable within the transverse passageway between a posterior surface of the biased stopping member and the second opening in the posterior surface of the stabilizing element.
11. The assembly of claim 10 wherein the body of the securing element has a diameter smaller than the second opening in the stabilizing element, and the securing element may be angularly displaced within the transverse passageway and the second opening in the stabilizing element.
12. The assembly of claim 1 wherein the stabilizing element includes at least two bores.
13. The assembly of claim-1 wherein the stabilizing element is configured to conform to and extend between at least two bone segments.
14. The assembly of claim 13 wherein the stabilizing element has a curved surface.
15. The assembly of claim 1 wherein the stabilizing element is selected from the group consisting of rods and plates.
16. The assembly of claim 1 wherein the securing element is selected from the group consisting of screws and nails.
17. The assembly of claim 2 wherein the collar is formed of an elastically deformable material.
18. The assembly of claim 2 wherein the collar is formed of a material selected from the group consisting of titanium and superelastic material.
19. The assembly of claim 2 wherein the collar has a posterior surface perpendicular to a longitudinal axis of the transverse passageway.
20. The assembly of claim 4 wherein the collar has a height less than the height of the groove.
21. An orthopedic implant assembly, comprising a) a stabilizing element having an interior surface, a posterior surface, and at least one bore, the bore having a first opening in the anterior-surface, a second opening in the posterior surface smaller than the first opening, and a transverse passageway extending from the first opening to the second opening, and a stopping member at an anterior section of the transverse passageway; and b) a securing element having an elongated body and a head secured to one end of the body, the head having a reversibly compressed configuration with a compressed diameter less than the diameter of the first opening and an uncompressed configuration with a diameter greater than a diameter of the stopping member and the second opening, so that the head of the securing element is retained within the transverse passageway between the stopping member and the second opening in the stabilizing element.
22. The assembly of claim 21 wherein the head of the securing element is configured to be displaceable posteriorly through the stopping member from an anterior to a posterior surface thereof.
23. The assembly of claim 21 wherein the head of the securing element has a plurality of slots and circumferentially disposed members, the circumferentially disposed members having posterior ends secured to the body of the securing element, and anterior ends radially moveable toward a longitudinal axis of the head of the securing element to form the compressed configuration and away from the longitudinal axis to form the uncompressed configuration.
24. The assembly of claim 21 wherein the stopping member is at the anterior end of the transverse passageway and defines the first opening in the stabilizing element.
25. The assembly of claim 21 wherein the stopping member has a posterior surface perpendicular to a longitudinal axis of the transverse passageway.
26. An orthopedic attachment assembly, comprising:
a) an attachment component which has at least one bore having a anterior bore portion, and a posterior bore portion having at least one transverse dimension smaller than transverse dimensions of the anterior bore portion;
b) a securing component having an enlarged integral portion that has at least one transverse dimension greater than the reduced transverse configuration of the posterior bore portion;
c) a stopping component which reduces a transverse configuration of the anterior bore portion to retain the enlarged integral portion of the securing component within the bore of the attachment component between the stopping component and the smaller transverse-dimension of the posterior bore portion; and (d) the posterior bore portion having a surface configured to conform to at least part of the enlarged integral portion of a securing component.
a) an attachment component which has at least one bore having a anterior bore portion, and a posterior bore portion having at least one transverse dimension smaller than transverse dimensions of the anterior bore portion;
b) a securing component having an enlarged integral portion that has at least one transverse dimension greater than the reduced transverse configuration of the posterior bore portion;
c) a stopping component which reduces a transverse configuration of the anterior bore portion to retain the enlarged integral portion of the securing component within the bore of the attachment component between the stopping component and the smaller transverse-dimension of the posterior bore portion; and (d) the posterior bore portion having a surface configured to conform to at least part of the enlarged integral portion of a securing component.
27. The attachment assembly of claim 26 wherein the stopping surface has a first configuration with inner transverse dimensions that are smaller than the enlarged portion of a securing component received by the bore and a second configuration with inner transverse dimensions that are at least equal to the enlarged integral portion of the securing component received by the bore.
26. The attachment assembly of claim 26 wherein the enlarged integral portion of the securing component has a posterior surface configured to engage the posterior bore portion to facilitate the angulation of the securing component within the bore.
29. The attachment assembly of claim 28 wherein at least part of the posterior bore portion has a bowl-shaped surface.
30. The attachment assembly of claim 29 wherein the bowl-shaped surface of the posterior bore portion at least in part is a hemispherical zone.
32. The attachment assembly of claim 26 wherein the stopping component is part of a biased stopping member.
32. The attachment assembly of claim 31 wherein the biased stopping member is a collar defining at least in part a passageway enlargeable from an unexpanded first inner diameter to an expanded second inner diameter larger than the first inner diameter, wherein the enlarged integral portion of the securing component has a maximum diameter greater than the unexpanded first inner diameter of the collar and less than the expanded inner diameter of the collar.
33. The attachment assembly of claim 32 wherein the bore in the attachment component has a groove in the anterior bore portion which receives the collar.
34. The attachment assembly of claim 32 wherein the enlarged portion of the securing component has a curved posterior surface which is configured to contact the collar anterior surface and expand the collar as the enlarged portion is displaced posteriorly through the collar passageway.
35. The attachment assembly of claim 32 wherein the collar has an anterior surface which tapers inwardly toward the transverse passageway passing therethrough.
36. The attachment assembly of claim 26 wherein a part of the posterior bore portion is configured to conform to a posterior surface of the enlarged integral portion of a securing component received within the bore.
37. The attachment assembly of claim 36 wherein a portion of the securing component posterior to the enlarged portion has smaller transverse dimensions than the posterior bore portion in the attachment component so the securing component may be angularly displaced within the bore.
38. The attachment assembly of claim 26 wherein the attachment component includes at least two bores.
39. The attachment assembly of claim 26 wherein the attachment component is configured to conform to and extend between at least two bone segments.
40. The attachment assembly of claim 26 wherein the attachment component has a curved surface.
41. The attachment assembly of claim 26 wherein the attachment component is selected from the group consisting of rods and plates.
42. The attachment assembly of claim 26 wherein the securing component disposed within the bore is selected from the group consisting of screws and nails.
43. The attachment assembly of claim 32 wherein the collar is formed of an elastically deformable material.
44. The attachment assembly of claim 32 wherein the collar is formed of a material selected from the group consisting of titanium and superelastic material.
45. The attachment assembly of claim 32 wherein the collar has a posterior surface perpendicular to a longitudinal axis of the bore extending through the attachment component.
46. The attachment assembly of claim 33 wherein the collar has a height less than the height of the groove.
47. The attachment assembly of claim 26 wherein the posterior bore portion is longer than the enlarged integral portion of the securing component so that the enlarged integral portion is longitudinally moveable within the posterior bore portion.
22 46. An orthopedic implant assembly, comprising a) an attachment component which has at least one bore having an anterior bore portion, and a posterior bore portion having at least one smaller transverse dimension than transverse dimensions of the anterior bore portion;
b) a securing component having an elongated body and an enlarged integral head at one end of the elongated body which has a reversibly compressed configuration with transverse dimensions and which has an uncompressed configuration with a diameter greater than the reduced transverse dimension of the compressed configuration c) a stopping component which reduces a transverse configuration of the anterior bore portion to retain the enlarged portion of a securing component within the bore of the attachment member between the stopping component and the smaller transverse dimension of the posterior bore portion, and d) the posterior bore portion having a surface configured to conform to at least part of the enlarged portion of a securing component.
b) a securing component having an elongated body and an enlarged integral head at one end of the elongated body which has a reversibly compressed configuration with transverse dimensions and which has an uncompressed configuration with a diameter greater than the reduced transverse dimension of the compressed configuration c) a stopping component which reduces a transverse configuration of the anterior bore portion to retain the enlarged portion of a securing component within the bore of the attachment member between the stopping component and the smaller transverse dimension of the posterior bore portion, and d) the posterior bore portion having a surface configured to conform to at least part of the enlarged portion of a securing component.
49. The implant assembly of claim 48 wherein the integral head of the securing component is configured to be displaceable posteriorly through the stopping component from an anterior to a posterior portion thereof.
50. The implant assembly of claim 48 wherein the head of the securing component has a plurality of slots and circumferentially disposed integral members having anterior ends that are radially moveable toward a longitudinal axis of the head of the securing component to form the compressed configuration and away from the longitudinal axis to form the uncompressed configuration.
51. The implant assembly of claim 48 wherein the stopping component has a surface perpendicular to a longitudinal axis of the bore.
52. The implant assembly of claim 47 wherein the posterior bore portion is longer than the enlarged integral portion of the securing component so that the enlarged integral portion is longitudinally moveable within the posterior bore portion.
53. An orthopedic implant assembly, comprising:
a) an attachment component having an anterior surface, a posterior surface, and at least one bore, the bore having an anterior bore portion and a posterior bore portion with a transverse dimension of the posterior portion being smaller than a transverse dimension of the anterior portion; and b) a stopping component which is at least partially disposed within the bore of the attachment component, which defines at least in part a reversibly expandable passageway having a first transverse configuration with a transverse dimension that is smaller than a transverse dimension of the anterior bore portion and a second transverse configuration with a transverse dimension larger than the transverse dimension of the first transverse configuration;
c) a securing component having an elongated body and an integral head which has a maximum transverse dimension greater than the transverse dimension of the first configuration of the stopping component passageway and greater than a transverse dimension of the posterior portion of the bore in the attachment component, so that the head of the securing component is retained between the stopping component and the smaller transverse dimension of the posterior bore portion.
a) an attachment component having an anterior surface, a posterior surface, and at least one bore, the bore having an anterior bore portion and a posterior bore portion with a transverse dimension of the posterior portion being smaller than a transverse dimension of the anterior portion; and b) a stopping component which is at least partially disposed within the bore of the attachment component, which defines at least in part a reversibly expandable passageway having a first transverse configuration with a transverse dimension that is smaller than a transverse dimension of the anterior bore portion and a second transverse configuration with a transverse dimension larger than the transverse dimension of the first transverse configuration;
c) a securing component having an elongated body and an integral head which has a maximum transverse dimension greater than the transverse dimension of the first configuration of the stopping component passageway and greater than a transverse dimension of the posterior portion of the bore in the attachment component, so that the head of the securing component is retained between the stopping component and the smaller transverse dimension of the posterior bore portion.
54. The orthopedic implant assembly of claim 53 wherein the stopping component is configured to prevent the back-out of the securing component through the bore of the attachment component.
55. The orthopedic implant assembly of claim 53 wherein the stopping component is biased to the first configuration.
56. The orthopedic implant assembly of claim 55 wherein the stopping component comprises a biased collar.
57. The orthopedic implant assembly of claim 55 wherein the head of the securing component has a curved posterior surface.
58. The orthopedic implant assembly of claim 56 wherein the anterior bore portion has a groove configured to receive the biased collar, and wherein the biased collar is configured to be reversibly expandable when seated in the groove.
59. The orthopedic implant assembly of claim 57 wherein the head of the securing component has a curved posterior surface and which is configured to contact the collar anterior surface and expand the collar as the head is displaced posteriorly through a passageway of the collar.
60. The assembly of claim 59 wherein the head of the securing component has a curved posterior surface which has a minimum transverse dimension smaller than the transverse dimension of the passageway of the unexpanded collar, and which is configured to contact the collar anterior surface and deflect the collar away from a longitudinal axis of the transverse passageway as the head is displaced posteriorly through the collar passageway.
61. The assembly of claim 56 wherein the collar has an anterior surface, which tapers toward the collar passageway.
62. The assembly of claim 61 wherein a posterior bore portion is curved and configured to receive the curved posterior surface of the head of the securing component.
63. The assembly of claim 53 wherein the head of the securing component is longitudinally displaceable between the stopping component and the posterior portion of the bore of the stabilizing component.
64. The assembly of claim 53 wherein the body of the securing component has a transverse dimension smaller than the transverse dimension of the posterior portion of the bore of the stabilizing component, and wherein the securing component may be angularly displaced within the posterior portion of the bore of the stabilizing component.
65. The assembly of claim 53 wherein the attachment component includes at least two bores.
66. The assembly of claim 53 wherein the attachment component is configured to conform to and extend between at least two bone segments.
67. The assembly of claim 66 wherein the attachment component has a curved posterior surface.
68. The assembly of claim 53 wherein the attachment component is selected from the group consisting of rods and plates.
69. The assembly of claim 53 wherein the securing component is selected from the group consisting of screws and nails.
70. The assembly of claim 56 wherein the biased collar is formed of an elastically deformable material.
71. The assembly of claim 56 wherein the biased collar is formed of a material selected from the group consisting of titanium and superelastic material.
72. The assembly of claim 56 wherein the collar has a posterior surface perpendicular to a longitudinal axis of the transverse passageway.
73. The assembly of claim 56 wherein the collar has a height less than the height of a groove within the bore of the attachment component so as to be slidable therein.
74. The assembly of claim 53 wherein the posterior bore portion is longer than the enlarged integral portion of the securing component so that the enlarged integral portion is longitudinally moveable within the posterior bore portion.
75. An orthopedic implant assembly, comprising:
a) an attachment component having a bore having an anterior bore portion, a posterior bore portion with a transverse dimension smaller than a transverse dimension of the anterior bore portion, and a stopping component at the anterior bore portion; and b) a securing component having an elongated body and an integral head secured to the elongated body which is reversibly compressible with a compressed transverse dimension less than the transverse dimension of the anterior portion of the bore and with an uncompressed transverse dimension greater than an inner transverse dimension of the stopping component and the posterior portion of the bore, so that the head of the securing component is retained between the stopping component and the smaller transverse dimension of the posterior portion of the bore of the stabilizing component.
a) an attachment component having a bore having an anterior bore portion, a posterior bore portion with a transverse dimension smaller than a transverse dimension of the anterior bore portion, and a stopping component at the anterior bore portion; and b) a securing component having an elongated body and an integral head secured to the elongated body which is reversibly compressible with a compressed transverse dimension less than the transverse dimension of the anterior portion of the bore and with an uncompressed transverse dimension greater than an inner transverse dimension of the stopping component and the posterior portion of the bore, so that the head of the securing component is retained between the stopping component and the smaller transverse dimension of the posterior portion of the bore of the stabilizing component.
76. The orthopedic implant assembly of claim 75 wherein the head of the securing component is configured to be displaceable posteriorly through the stopping component from an anterior to a posterior surface thereof.
77. The orthopedic implant assembly of claim 75 wherein the head of the securing component has a plurality of slots and circumferentially disposed integral members having anterior ends that are radially moveable toward a longitudinal axis of the head of the securing component to form the compressed configuration and away from the longitudinal axis to form the uncompressed configuration.
78. The orthopedic implant assembly of claim 75 wherein the stopping component is in the anterior portion of the bore.
79. The orthopedic implant assembly of claim 75 wherein the stopping component has a posterior surface perpendicular to a longitudinal axis of the bore.
80. The orthopedic implant assembly of claim 75 wherein the posterior bore portion is longer than the enlarged integral portion of the securing component so that the enlarged integral portion is longitudinally moveable within the posterior bore portion.
61. An orthopedic implant assembly, comprising:
a) an attachment component having at least one bore with an anterior bore portion which has a transverse dimension, a posterior bore portion which has a transverse dimension smaller than the transverse dimension of the anterior bore portion; and b) a biased stopping component which has a first configuration that extends within the at least one bore of the stabilizing element and reduces at least one transverse cross-sectional dimension of the bore passageway and which is elastically deformable to a second configuration which increases the at least one transverse cross-sectional dimension reduced by the biased stopping component in the first configuration; and c) a securing component having an elongated body and an enlarged integral head which has a maximum transverse dimension greater than the transverse dimension of the bore passageway reduced by first configuration of the biased stopping member and greater than a transverse dimension of the posterior bore portion in the attachment component, so that the head of the securing component is retained between the biased stopping member and the posterior portion of the bore.
a) an attachment component having at least one bore with an anterior bore portion which has a transverse dimension, a posterior bore portion which has a transverse dimension smaller than the transverse dimension of the anterior bore portion; and b) a biased stopping component which has a first configuration that extends within the at least one bore of the stabilizing element and reduces at least one transverse cross-sectional dimension of the bore passageway and which is elastically deformable to a second configuration which increases the at least one transverse cross-sectional dimension reduced by the biased stopping component in the first configuration; and c) a securing component having an elongated body and an enlarged integral head which has a maximum transverse dimension greater than the transverse dimension of the bore passageway reduced by first configuration of the biased stopping member and greater than a transverse dimension of the posterior bore portion in the attachment component, so that the head of the securing component is retained between the biased stopping member and the posterior portion of the bore.
82. The orthopedic implant assembly of claim 81 wherein the elastically deformed second configuration of the stopping component facilitates passage of the integral head of the securing component by the stopping component.
83. The orthopedic implant assembly of claim 82 wherein the biased stopping component elastically returns from the second configuration back to the first configuration.
84. The assembly of claim 81 wherein the biased stopping component comprises a collar.
85. The assembly of claim 84 wherein the biased stopping component is disposed in part within a recess of the stabilizing component.
86. The assembly of claim 85 wherein the recess is a groove configured to slidably receive the biased collar.
87. The attachment assembly of claim 81 wherein the posterior bore portion is longer than the enlarged integral portion of the securing component so that the enlarged integral portion is longitudinally moveable within the posterior bore portion.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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CA2628346A CA2628346C (en) | 1999-07-08 | 2000-07-06 | Orthopedic implant assembly |
CA2629225A CA2629225C (en) | 1999-07-08 | 2000-07-06 | Orthopedic implant assembly |
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Application Number | Priority Date | Filing Date | Title |
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US09/349,519 | 1999-07-08 | ||
US09/349,519 US6261291B1 (en) | 1999-07-08 | 1999-07-08 | Orthopedic implant assembly |
PCT/US2000/018446 WO2001003592A1 (en) | 1999-07-08 | 2000-07-06 | Orthopedic implant assembly |
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CA2628346A Division CA2628346C (en) | 1999-07-08 | 2000-07-06 | Orthopedic implant assembly |
CA2629225A Division CA2629225C (en) | 1999-07-08 | 2000-07-06 | Orthopedic implant assembly |
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CA2415096A1 CA2415096A1 (en) | 2001-01-18 |
CA2415096C true CA2415096C (en) | 2008-05-27 |
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CA2629225A Expired - Lifetime CA2629225C (en) | 1999-07-08 | 2000-07-06 | Orthopedic implant assembly |
CA002415096A Expired - Lifetime CA2415096C (en) | 1999-07-08 | 2000-07-06 | Orthopedic implant assembly |
CA2628346A Expired - Lifetime CA2628346C (en) | 1999-07-08 | 2000-07-06 | Orthopedic implant assembly |
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Application Number | Title | Priority Date | Filing Date |
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CA2714070A Expired - Lifetime CA2714070C (en) | 1999-07-08 | 2000-07-06 | Orthopedic implant assembly |
CA2629225A Expired - Lifetime CA2629225C (en) | 1999-07-08 | 2000-07-06 | Orthopedic implant assembly |
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Application Number | Title | Priority Date | Filing Date |
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CA2628346A Expired - Lifetime CA2628346C (en) | 1999-07-08 | 2000-07-06 | Orthopedic implant assembly |
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US (2) | US6261291B1 (en) |
EP (3) | EP1741399B1 (en) |
JP (1) | JP3650361B2 (en) |
AT (1) | ATE340537T1 (en) |
AU (2) | AU777576B2 (en) |
CA (4) | CA2714070C (en) |
DE (1) | DE60030980T2 (en) |
DK (3) | DK1741399T3 (en) |
ES (3) | ES2272300T3 (en) |
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USRE43008E1 (en) | 2011-12-06 |
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