WO2002085219A2 - Fermoral nail intamedullary system - Google Patents
Fermoral nail intamedullary system Download PDFInfo
- Publication number
- WO2002085219A2 WO2002085219A2 PCT/US2002/015245 US0215245W WO02085219A2 WO 2002085219 A2 WO2002085219 A2 WO 2002085219A2 US 0215245 W US0215245 W US 0215245W WO 02085219 A2 WO02085219 A2 WO 02085219A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- bore
- intramedullary
- assembly
- lag screw
- tang
- Prior art date
Links
- 210000000988 bone and bone Anatomy 0.000 claims abstract description 54
- 230000006835 compression Effects 0.000 claims abstract description 43
- 238000007906 compression Methods 0.000 claims abstract description 43
- 230000001054 cortical effect Effects 0.000 claims description 22
- 238000004873 anchoring Methods 0.000 claims description 20
- 238000003780 insertion Methods 0.000 claims description 18
- 230000037431 insertion Effects 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 11
- 238000002513 implantation Methods 0.000 claims description 5
- 206010017076 Fracture Diseases 0.000 description 21
- 208000010392 Bone Fractures Diseases 0.000 description 17
- 210000001624 hip Anatomy 0.000 description 14
- 210000000689 upper leg Anatomy 0.000 description 14
- 239000004699 Ultra-high molecular weight polyethylene Substances 0.000 description 6
- 239000012634 fragment Substances 0.000 description 6
- 210000002414 leg Anatomy 0.000 description 6
- 230000003993 interaction Effects 0.000 description 5
- 230000000712 assembly Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000011368 organic material Substances 0.000 description 3
- 230000035515 penetration Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 210000002436 femur neck Anatomy 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000002188 osteogenic effect Effects 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 description 2
- SHXWCVYOXRDMCX-UHFFFAOYSA-N 3,4-methylenedioxymethamphetamine Chemical compound CNC(C)CC1=CC=C2OCOC2=C1 SHXWCVYOXRDMCX-UHFFFAOYSA-N 0.000 description 1
- 206010020100 Hip fracture Diseases 0.000 description 1
- 241000110847 Kochia Species 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 241000251539 Vertebrata <Metazoa> Species 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 210000000588 acetabulum Anatomy 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 210000003414 extremity Anatomy 0.000 description 1
- 210000000501 femur body Anatomy 0.000 description 1
- 238000002594 fluoroscopy Methods 0.000 description 1
- 230000005021 gait Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 210000000527 greater trochanter Anatomy 0.000 description 1
- 210000003128 head Anatomy 0.000 description 1
- 230000035876 healing Effects 0.000 description 1
- 210000004394 hip joint Anatomy 0.000 description 1
- 239000007943 implant Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000037230 mobility Effects 0.000 description 1
- 210000003903 pelvic floor Anatomy 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 229910001256 stainless steel alloy Inorganic materials 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
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
- A61B17/74—Devices for the head or neck or trochanter of the femur
- A61B17/742—Devices for the head or neck or trochanter of the femur having one or more longitudinal elements oriented along or parallel to the axis of the neck
- A61B17/744—Devices for the head or neck or trochanter of the femur having one or more longitudinal elements oriented along or parallel to the axis of the neck the longitudinal elements coupled to an intramedullary nail
-
- 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
- A61B17/72—Intramedullary pins, nails or other devices
- A61B17/7233—Intramedullary pins, nails or other devices with special means of locking the nail to the bone
- A61B17/725—Intramedullary pins, nails or other devices with special means of locking the nail to the bone with locking pins or screws of special form
-
- 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
- A61B17/72—Intramedullary pins, nails or other devices
- A61B17/7233—Intramedullary pins, nails or other devices with special means of locking the nail to the bone
- A61B17/7258—Intramedullary pins, nails or other devices with special means of locking the nail to the bone with laterally expanding parts, e.g. for gripping the bone
- A61B17/7266—Intramedullary pins, nails or other devices with special means of locking the nail to the bone with laterally expanding parts, e.g. for gripping the bone with fingers moving radially outwardly
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S606/00—Surgery
- Y10S606/916—Tool for installing or removing orthopedic fastener
Definitions
- the present invention generally relates to an intramedullary system for coupling bone portions across a fracture therebetween and, more specifically, to an intramedullary hip pinning system for rigidly interconnecting a femoral head portion to the remaining portion (s) of the femur and across a fracture or fractures in the area of the femoral neck or the shaft of the femur or combinations of such fractures.
- Bones are the hard parts of the skeleton found in vertebrates. In its most basic construct, bones are formed of a relatively soft, spongy cancellous material surrounded by a much harder cortex. The cancellous bone yields under relatively low loading, while the much more dense cortical bone supports much higher loading.
- a hip joint is a heavily stressed, load-carrying bone joint in the human body. It is essentially a ball and socket joint formed by the top of the femur which rotates within a cup- shaped acetabulum at the base of the pelvis. When a break or fracture occurs adjacent to the top of the femur, the separated portions of the femur must be held together while healing occurs .
- Intramedullary nails have been inserted down the entire length of the femoral canal to provide a basis for the fixation. Threaded wires, standard bone screws or cannulated bone screws were then inserted through or along side the proximal nail and into the femoral head to provide fixation and rotational stability.
- the conventional nails did not provide compression of the proximal bone fragments against each other. Also, in longer nails the distal tip of the nail tended to rotate out of plane which forced the surgeon to locate the distal screw holes using fluoroscopy by a method commonly known as "free-handing" . In the 1960s, the compression hip screw was introduced, resulting in improved fixation of the proximal femur.
- a lag screw assembly was inserted into the femoral head, a plate was attached to the lateral femur, and a compression screw joined the two. These implants provided a more rigid structure for the patient and allowed the surgeon to compress the fractured fragments against each other thereby decreasing the time to mobility.
- a number of compression hip screws have been introduced for fracture fixation about the proximal femur, including the Dynamic Hip Screw. During implantation these compression hip screws require an incision at least equal to the length of the plate being used which extends operative time and blood loss .
- the side plate also creates a protuberance on the lateral side which provides an annoyance to the patient.
- Compression hip screw systems also fail to provide adequate compression in oseteogenic patients because the lag screw assembly threads fail to obtain sufficient purchase due to poor bone stock. Poor purchase is known to contribute to nonunion, malunion and the lag screw assembly eroding through the superior bone of the head of the femur in a condition known as "cut out" . Additionally, many patients are dissatisfied with the results of compression hip screw surgery because of the excessive sliding to a medial displacement and shortening position which leads to a change in gait. Newer devices and inventions include additions to the nail and lag screw assembly to ease or eliminate the need to locate the distal screw holes and improve the fixation.
- Bramlet et al describe a surgical anchor which has deployable tangs . These tangs are simple in design, internally positioned, yet easily deployed into, and if desired through, the cortical bone providing improved purchase for compression of a fracture, especially in osteogenic bone. These tangs are just as easily retracted should the device require explantation.
- the nails are typically held in place on the distal end through interference forces with the intramedullary canal and through the use of locking screws.
- the Gamma Nail's shape accommodates the relative shape of the greater trochanter and femoral neck and head fragments, and the shape of the hip is therefore preserved. Nonunions are less frequent because bone-to-bone contact is maintained and the bulk of an intramedullary hip screw blocks excessive sliding.
- Intramedullary hip screws work best in reverse obliquity fractures, a fracture, in which compression hip screws are least effective . Osteogenic bone still provides a poor medium for purchase of the lag screw assembly of the Gamma Nail inhibiting adequate compression and rotational stability.
- Such a system includes a simple, effective and controllable fixation device which allows greater purchase of the lag screw assembly within the femoral head, improved compression across the fracture line, provides a means of rotational stability both in the femoral head and in the femoral shaft, and minimizes the need for additional distal incisions to locate and place locking screws.
- This system allows the surgeon a choice of penetration distance within the femoral head and femoral shaft fixation based upon the injuries presented and the desired level of treatment. Finally, this system allows explantation to occur as easily as implantation.
- an intramedullary nail system for coupling bone portions on opposite sides of a fracture.
- the intramedullary nail system according to the invention is especially suitable for installation within the medullary canal of a fractured long bone, such as found in an arm or leg.
- the intramedullary nail system includes an elongated rod with radial portals which allow passage of locking screws or anchoring tangs and a lag screw assembly.
- the rod has a distal end and a proximal end with internal threads.
- a lag screw assembly having an externally threaded portions.
- the radial portals in the distal end allow passage of internally deployable and retractable anchoring tangs or cortical screws.
- a radial portal in the proximal end accommodates a sleeve which passes through the intramedullary nail and through which the lag screw assembly passes freely while preventing rotation of said lag screw assembly.
- a compression screw engages the sleeve and cooperates with the internal threads of the lag screw assembly trailing end providing axial translation of the lag screw assembly within the sleeve.
- the proximal end has an axial portal for an end cap with external threads on the trailing end which engages the internal threads of the intramedullary nail .
- the end cap has a parabaloid leading end which engages the sleeve thereby preventing translation and rotation of said sleeve.
- the anchoring tang assembly When the intramedullary nail is placed into position the anchoring tang assembly is actuated to deploy the tangs out from their stowed position into the cortical bone. The tangs are deployed to any desired position thereby achieving a desired fixation based upon the quality of the bone.
- cortical screws may be placed to secure the intramedullary nail with the surrounding cortical bone.
- the tang assembly is actuated and the tangs are deployed to any desired position thereby achieving the desired fixation based upon the quality of the bone.
- the sleeve is coaxially inserted over the lag screw assembly' s trailing end and through the intramedullary nail .
- An end cap is threaded into the intramedullary nail with it's leading end contacting and frictionally holding the sleeve. By providing interference against the sleeve, the sleeve is prevented from altering its position either through translation or rotation.
- the compression screw passes through the sleeve and engages the lag screw assembly. As the compression screw is tightened the lag screw assembly and associated first bone portion are pulled against the intramedullary nail and second bone portion resulting in compressive forces being applied across the fracture.
- the intramedullary nail is preferably cannulated to allow passage of one or more anchoring tang assemblies. These anchoring tang assemblies are inserted from the proximal end towards the distal end and the tangs deployed by means of an actuator driver.
- An alternate embodiment describes a retracted anchoring tang assembly which is permanently placed within the distal end of the intramedullary nail and is deployed or retracted by means of an actuator driver from the proximal end of the intramedullary nail.
- the lag screw assembly preferably contains a permanently placed anchoring tang assembly stored in a retracted position within the leading end. The tangs are deployed or retracted from the trailing end of the lag screw assembly.
- the anchoring tang assembly contains arcurate shaped tangs that are permanently attached to the assembly's main body. These tangs are initially formed into a prescribed position for storage .
- the compression screw preferably contains a patch of ultra-high molecular weight poly-ethylene (UHMWPE) within the threads . This provides constant positive engagement between the compression screw external threads and the lag screw assembly internal threads .
- the end cap preferably contains a patch of ultra-high molecular weight poly-ethylene (UHMWPE) within the threads. This provides constant positive engagement between the end cap external threads and the intramedullary nail internal threads.
- FIG. 1 is a longitudinal perspective view of the preferred embodiment intramedullary system in an exploded state
- FIG. 2 is a view, partially in longitudinal cross section, of the intramedullary system placed in the intramedullary canal of a fractured bone using cortical screws as a method of fixation
- FIG. 3 is a view, partially in longitudinal cross section, of the intramedullary system placed in the intramedullary canal of a fractured bone using a tang assembly as a method of fixation
- FIG. 3A is an enlarged, cross section view of the tang assembly in FIG. 3
- FIG. 3B shows the stowed tang assembly from FIG. 3A
- FIG. 3C shows the insertion/deployment/retraction instrument of FIG. 3A;
- FIG. 4A is an enlarged, cross section view of the intramedullary nail in FIG. 1;
- FIG. 4B is a side view of FIG. 4A;
- FIG. 4C is an end view of FIG. 4B;
- FIG. 5 is an enlargement of the lag screw assembly in FIG. 1;
- FIG. 6A is an enlargement of the tang assembly in FIG. 3A;
- FIG. 6B is an enlargement of the stowed tang assembly from FIG. 3B;
- FIG. 6C is a top view of FIG . 6B;
- FIG. 7A is an enlargement of the sleeve in FIG. 1;
- FIG. 7B is a cross section view of FIG. 7A
- FIG. 7C is an end view of FIG. 7A
- FIG. 8A is an enlargement of the end cap in FIG. 1
- FIG. 8B is a top view of FIG. 8A
- FIG. 9A is an enlargement of the compression screw in FIG. 1
- FIG. 9B is a top view of FIG. 9A;
- the individual components of the assembly are constructed of implantable grade stainless steel alloys in the preferred embodiment but could also be constructed of implantable grade titanium alloys, as well. Other materials having the requisite properties, of strength and inertness, may be used. These components consist of the lag screw assembly 1, the nail body 2, the tang assembly 3, the sleeve 4, the compression screw 5, and the end cap 6 and the optional cortical screws 7.
- the lag screw assembly 1 is described in detail in U.S. Patent 6,183,474 Bl, as is compression screw 5, and that disclosure is incorporated herein by reference .
- the external features of the lag screw assembly are indicated in FIG.5.
- the threads 8 engage the cancellous bone within the femoral head on the medial or proximal side of the fracture line; the tang 9 is also located on the medial or proximal side of the fracture line as shown in FIG. 3.
- the tangs 9 are fully retracted into the body of the lag screw and remains that way until the lag screw assembly is fully positioned within the femoral head.
- the tangs 9 When the tangs 9 are deployed through opening 43 into the femoral head, the tangs 9 penetrate the cortical bone, greatly increasing purchase (axial fixation) and rotational stability of the lag screw assembly.
- the tangs 9 are fully reversible if removal of the lag screw is ever required.
- the shaft 10 is of a "double D " cross section which interfaces with bore 27 (FIG. 7B) and end configuration 31 (FIG. 7C) of the sleeve in such a way as to allow axial translation or slide of the lag screw while preventing rotation relative to the sleeve. This sliding prevents penetration of the femoral head by the proximal end of the lag screw as the fracture compresses from patient load bearing.
- the nail body (FIG. 4A,B, C) is designed for antegrade insertion into the intramedullary canal of the femur.
- the proximal outside diameter W of the body is greater than the distal outside diameter M due to narrowing of the canal and to allow the lag screw clearance radial bore 11 to be large enough to pass the threaded diameter 8 of the lag screw 1 and provide a sliding fit to the outside diameter L of the sleeve .
- the axis of clearance bore 11 is at an angle V with respect to the distal diametral axis. This angle V is such as to allow proper positioning of lag screw 1 within the femoral head.
- Both the proximal axial bore 15 and the distal axial bore 14 are of circular cross section.
- Distal bore 14 is sized to permit a sliding fit with the tang body 20.
- Four bores or tang portals 12 are located on a 90 degree radial spacing penetrating from the distal outside diameter M into the distal bore 14, on axes which form an angle J to the distal outside diameter M. This angle J is critical to the proper formation and exit of the tang 21.
- the clearance holes or bores 13 of FIG.4B pass through the distal outside surface and wall into the distal bore 14 and continue on the same axis through the opposite wall and outer diameter.
- the clearance holes 13 are such as to allow passage of the threaded portion of the cortical screw 7 (FIG.l) .
- a frusto-conical feature 18 (FIG.4A) provides a transition between the circular bore 14 and the square bore 19.
- the square bore 19 serves three purposes : it provides clearance through the distal end of the nail body 2 for passage of a guide pin, used during fracture alignment and installation of the of the nail body into the intramedullary canal, it provides a sliding fit for the square forward protrusion 23 (FIG.6A) of tang assembly 3, and it acts as a "vent" hole for any organic material within the bore 14 which is being pushed ahead of the tang during tang installation.
- the forward most clearance holes 13 also intersect the frusto-conical featurel ⁇ and will act as vents for organic material during tang insertion after the square protrusion 23 has engaged and filled square bore 19.
- the internal threads 16 at the proximal end of the nail body 2 provide for instrument interface, as do slots 17.
- the threads 16 are used for attachment and the slots 17 for radial alignment.
- the internal threads 16 also engage the external threads 34 (FIG.8A) of end cap 6.
- the tang assembly 3 has four equally sized and radially spaced tangs 21 which are preformed to radius R.
- each tang 21 results in a dimension between the trailing ends of opposing legs which is greater than the outside diameter of tang body 20 and the bore diameter 14 of nail body 2.
- the tang body 20 is circular in cross section and sized for a sliding fit within nail body borel4 with a leading edge chamfer 22 which transitions into the leading protrusion 23 which has a square cross section and leading end taper 24.
- Tang body 20 contains an internally threaded bore 25 which is the instrument interface for the instrument used to insert and deploy the tang. It must be noted that threaded bore 25 is not needed for tang retraction.
- FIG. 6A illustrates the deployed 1 shape of tang assembly 3 which is the shape it assumes after the
- Insertion/deployment of the tang may occur after insertion
- Shaft 44 is preferably circular in
- guide 46 provides a sliding fit in bore 14 and interacts with
- an axial force is exerted by the insertion/deployment/retraction instrument 47 in the opposite direction as for insertion.
- This causes the tang assembly 3 to translate back up bore 14 and the sharp ends of tangs 21 to encounter tang portals 12. Since the tangs 21 were elastically compressed inward by bore 14 they will now spring outward forcing the sharp end of tang legs 21 into tang exit holes 12. Further translation of the tang assembly 3 forces the tang legs through the tang exit holes 12. Due to the diameter and angle of the tang portals 12, the tangs 21 are formed in such a manner as to emerge almost perpendicular to the femoral cortex. Continued translation of the tang assembly3 causes the tangs 21 to penetrate the femoral cortex.
- FIG.3A shows the tang assembly 3 in the fully deployed position having translated a distance from point A in FIG. 3B to point B of FIG. 3A.
- the tangs 21 are fully retractable .
- Distal fixation of the nail body 2 can be accomplished without use of tang assembly 3. This is accomplished by using the cortical screws 7 (FIG.l and FIG. 2) .
- the cortical screws 7 are placed through the lateral femoral cortex and through clearance holes 13 in the nail body 2, then through the medial femoral cortex as shown in FIG. 2.
- the cortical screws are not used in conjunction with distal tang fixation and cannot be passed through clearance holes 13 if there is a tang assembly 3 inserted into nail body 2.
- Sleeve 4 is utilized to secure lag screw assembly 1 into clearance bore 11 after implantation of the lag assembly 1 -and nail body 2 in the femur.
- the outside diameter L (FIG.7B) is sized for a sliding fit in bore 11.
- the sleeve 4 has a circular bore 27 and a small length (D) of "double D" bore 31 at the leading end.
- the leading bore also contains a countersink 30. Between the leading and trailing ends is a tapered cross section 29.
- the trailing outside diameter has a diamond knurl 26 and the circular bore 27 contains a countersink 28 at the trailing end.
- End cap 6 is inserted into the proximal end of nail body 2 until external threads 34 (FIG.8A) contact the internal threads 16 of nail body 2. The end cap 6 is then rotated clockwise by means of hexagonal recess 32 to engage the threads. End cap 6 contains a patch of ultra high molecular weight polyethylene 35 which acts as a thread locking element to help prevent unwanted loosening of end cap 6. As the end cap advances its leading end spherical radius 37 contacts sleeve taper 29 forcing sleeve 4 against the opposite side of bore 11 indicated P (FIG. 4C) . At this time the taper 29 is in contact with one end of bore 11 and the knurl surface 26 is in contact with the opposite end of bore 11, indicated S in FIG. 4C.
- the compression screw 5 can be utilized to draw the two assemblies together and compress the fracture.
- the externally threaded end 40 of the compression screw 5 is inserted through the trailing end of sleeve 4 and mated with the internal threads 48 in the trailing end of lag screw 1.
- An ultra high molecular weight polyethylene patch 39 in the compression screw thread 40 provides thread locking.
- compression screw chamfer 38 contacts sleeve 4 countersink 28 causing lag screw 1 to be drawn towards nail body 2 as the compression screw 6 is further rotated thus compressing the fracture .
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA2444914A CA2444914C (en) | 2001-04-24 | 2002-04-23 | Fermoral nail intamedullary system |
AU2002309801A AU2002309801B2 (en) | 2001-04-24 | 2002-04-23 | Fermoral nail intamedullary system |
EP02736824A EP1414359A2 (en) | 2001-04-24 | 2002-04-23 | Fermoral nail intamedullary system |
JP2002582801A JP2005509453A (en) | 2001-04-24 | 2002-04-23 | Femur bone marrow nailing system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/841,851 US6443954B1 (en) | 2001-04-24 | 2001-04-24 | Femoral nail intramedullary system |
US09/841,851 | 2001-04-24 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2002085219A2 true WO2002085219A2 (en) | 2002-10-31 |
WO2002085219A3 WO2002085219A3 (en) | 2004-03-04 |
Family
ID=25285846
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2002/015245 WO2002085219A2 (en) | 2001-04-24 | 2002-04-23 | Fermoral nail intamedullary system |
Country Status (6)
Country | Link |
---|---|
US (1) | US6443954B1 (en) |
EP (1) | EP1414359A2 (en) |
JP (1) | JP2005509453A (en) |
AU (1) | AU2002309801B2 (en) |
CA (1) | CA2444914C (en) |
WO (1) | WO2002085219A2 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2873913A1 (en) | 2004-08-06 | 2006-02-10 | Fournitures Hospitalieres Ind | Intramedullary fixation device for femur fracture, has jig bushing fixed in oblique passage of intramedullary nail, and including channels to receive, via their respective insertion ends, cephalic screw end and threaded end of cephalic stem |
JP2007506454A (en) * | 2003-09-18 | 2007-03-22 | ジンテーズ ゲゼルシャフト ミト ベシュレンクテル ハフツング | Device for treating femoral fractures |
EP2020934A1 (en) * | 2006-04-06 | 2009-02-11 | Halifax Biomedical Inc. | Intramedullary rod with vent |
JP2012071009A (en) * | 2010-09-29 | 2012-04-12 | Japan Medical Materials Corp | Femoral fracture treatment device |
US9480509B2 (en) | 2013-11-07 | 2016-11-01 | Four Studies Ltd. | Osteosynthesis apparatus for proximal femur fracture and master screw-type screw apparatus for osteosynthesis apparatus for proximal femur fracture |
JP2021506388A (en) * | 2017-12-13 | 2021-02-22 | デピュイ・シンセス・プロダクツ・インコーポレイテッド | Intramedullary nail with cannulation access hole |
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US6783529B2 (en) * | 1999-04-09 | 2004-08-31 | Depuy Orthopaedics, Inc. | Non-metal inserts for bone support assembly |
US8187303B2 (en) | 2004-04-22 | 2012-05-29 | Gmedelaware 2 Llc | Anti-rotation fixation element for spinal prostheses |
US7674293B2 (en) | 2004-04-22 | 2010-03-09 | Facet Solutions, Inc. | Crossbar spinal prosthesis having a modular design and related implantation methods |
US7691145B2 (en) * | 1999-10-22 | 2010-04-06 | Facet Solutions, Inc. | Prostheses, systems and methods for replacement of natural facet joints with artificial facet joint surfaces |
US6974478B2 (en) * | 1999-10-22 | 2005-12-13 | Archus Orthopedics, Inc. | Prostheses, systems and methods for replacement of natural facet joints with artificial facet joint surfaces |
WO2001056487A1 (en) * | 2000-02-02 | 2001-08-09 | Nelson Owen A | An orthopedic implant used to repair intertrochanteric fractures and a method for inserting the same |
AU2000235484B2 (en) * | 2000-04-10 | 2004-10-14 | Synthes Gmbh | Osteosynthetic anchoring element |
US6520964B2 (en) | 2000-05-01 | 2003-02-18 | Std Manufacturing, Inc. | System and method for joint resurface repair |
US7678151B2 (en) | 2000-05-01 | 2010-03-16 | Ek Steven W | System and method for joint resurface repair |
US6610067B2 (en) | 2000-05-01 | 2003-08-26 | Arthrosurface, Incorporated | System and method for joint resurface repair |
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EP0441577A2 (en) * | 1990-02-06 | 1991-08-14 | SMITH & NEPHEW RICHARDS, INC. | Intramedullary hip screw |
US5810820A (en) * | 1994-05-20 | 1998-09-22 | Santori; Francesco Saverio | Endomedullar device for nailing long distance |
US5976139A (en) * | 1996-07-17 | 1999-11-02 | Bramlet; Dale G. | Surgical fastener assembly |
US6077264A (en) * | 1996-04-05 | 2000-06-20 | Chemello; Antonio | Intramedullary nail for the osteosynthesis of bone fractures |
WO2002067794A1 (en) * | 2001-02-27 | 2002-09-06 | Tqo S.R.L. | Intramedullary nail for the osteosynthesis of trochanteric fractures of the femur |
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GB9113578D0 (en) * | 1991-06-24 | 1991-08-14 | Howmedica | Intramedullary intertrochanteric fracture fixation appliance |
DE4318150C2 (en) * | 1993-06-01 | 1996-08-01 | Endocare Ag | Osteosynthesis tools for the treatment of subtrochanteric and pertrochanteric fractures as well as fractures of the femoral neck |
IT1284694B1 (en) | 1996-07-23 | 1998-05-21 | Francesco Saverio Santori | ENDOMIDOLLAR DEVICE FOR BONE NAILING. |
IT1293934B1 (en) | 1997-01-21 | 1999-03-11 | Orthofix Srl | ENDOMIDOLLAR NAIL FOR THE TREATMENT OF HIP FRACTURES |
US6235031B1 (en) * | 2000-02-04 | 2001-05-22 | Encore Medical Corporation | Intramedullary fracture fixation device |
-
2001
- 2001-04-24 US US09/841,851 patent/US6443954B1/en not_active Expired - Lifetime
-
2002
- 2002-04-23 CA CA2444914A patent/CA2444914C/en not_active Expired - Fee Related
- 2002-04-23 JP JP2002582801A patent/JP2005509453A/en active Pending
- 2002-04-23 WO PCT/US2002/015245 patent/WO2002085219A2/en not_active Application Discontinuation
- 2002-04-23 AU AU2002309801A patent/AU2002309801B2/en not_active Ceased
- 2002-04-23 EP EP02736824A patent/EP1414359A2/en not_active Withdrawn
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EP0441577A2 (en) * | 1990-02-06 | 1991-08-14 | SMITH & NEPHEW RICHARDS, INC. | Intramedullary hip screw |
US5810820A (en) * | 1994-05-20 | 1998-09-22 | Santori; Francesco Saverio | Endomedullar device for nailing long distance |
US6077264A (en) * | 1996-04-05 | 2000-06-20 | Chemello; Antonio | Intramedullary nail for the osteosynthesis of bone fractures |
US5976139A (en) * | 1996-07-17 | 1999-11-02 | Bramlet; Dale G. | Surgical fastener assembly |
WO2002067794A1 (en) * | 2001-02-27 | 2002-09-06 | Tqo S.R.L. | Intramedullary nail for the osteosynthesis of trochanteric fractures of the femur |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007506454A (en) * | 2003-09-18 | 2007-03-22 | ジンテーズ ゲゼルシャフト ミト ベシュレンクテル ハフツング | Device for treating femoral fractures |
FR2873913A1 (en) | 2004-08-06 | 2006-02-10 | Fournitures Hospitalieres Ind | Intramedullary fixation device for femur fracture, has jig bushing fixed in oblique passage of intramedullary nail, and including channels to receive, via their respective insertion ends, cephalic screw end and threaded end of cephalic stem |
EP2020934A1 (en) * | 2006-04-06 | 2009-02-11 | Halifax Biomedical Inc. | Intramedullary rod with vent |
EP2020934A4 (en) * | 2006-04-06 | 2011-06-22 | Halifax Biomedical Inc | Intramedullary rod with vent |
JP2012071009A (en) * | 2010-09-29 | 2012-04-12 | Japan Medical Materials Corp | Femoral fracture treatment device |
US9480509B2 (en) | 2013-11-07 | 2016-11-01 | Four Studies Ltd. | Osteosynthesis apparatus for proximal femur fracture and master screw-type screw apparatus for osteosynthesis apparatus for proximal femur fracture |
JP2021506388A (en) * | 2017-12-13 | 2021-02-22 | デピュイ・シンセス・プロダクツ・インコーポレイテッド | Intramedullary nail with cannulation access hole |
JP7286648B2 (en) | 2017-12-13 | 2023-06-05 | デピュイ・シンセス・プロダクツ・インコーポレイテッド | Intramedullary nail with cannulation access hole |
Also Published As
Publication number | Publication date |
---|---|
CA2444914A1 (en) | 2002-10-31 |
WO2002085219A3 (en) | 2004-03-04 |
EP1414359A2 (en) | 2004-05-06 |
AU2002309801B2 (en) | 2006-09-07 |
CA2444914C (en) | 2011-06-21 |
US6443954B1 (en) | 2002-09-03 |
AU2002309801C1 (en) | 2002-11-05 |
JP2005509453A (en) | 2005-04-14 |
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