CA2078818A1 - Implant fixation stem - Google Patents
Implant fixation stemInfo
- Publication number
- CA2078818A1 CA2078818A1 CA002078818A CA2078818A CA2078818A1 CA 2078818 A1 CA2078818 A1 CA 2078818A1 CA 002078818 A CA002078818 A CA 002078818A CA 2078818 A CA2078818 A CA 2078818A CA 2078818 A1 CA2078818 A1 CA 2078818A1
- Authority
- CA
- Canada
- Prior art keywords
- implant
- slot
- stem
- medial
- femur
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
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- 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
- A61F2/32—Joints for the hip
- A61F2/36—Femoral heads ; Femoral endoprostheses
- A61F2/3662—Femoral shafts
- A61F2/3676—Distal or diaphyseal parts of shafts
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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- 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
- A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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- 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
- A61F2/32—Joints for the hip
- A61F2/36—Femoral heads ; Femoral endoprostheses
- A61F2/3662—Femoral shafts
- A61F2/367—Proximal or metaphyseal parts of shafts
-
- 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
- A61F2002/30003—Material related properties of the prosthesis or of a coating on the prosthesis
- A61F2002/30004—Material related properties of the prosthesis or of a coating on the prosthesis the prosthesis being made from materials having different values of a given property at different locations within the same prosthesis
- A61F2002/30014—Material related properties of the prosthesis or of a coating on the prosthesis the prosthesis being made from materials having different values of a given property at different locations within the same prosthesis differing in elasticity, stiffness or compressibility
-
- A—HUMAN NECESSITIES
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- 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
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- A61F2002/30317—The prosthesis having different structural features at different locations within the same prosthesis
- A61F2002/30319—The prosthesis having different structural features at different locations within the same prosthesis differing in moment of inertia
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- A—HUMAN NECESSITIES
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- 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
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- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
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- A61F2002/30317—The prosthesis having different structural features at different locations within the same prosthesis
- A61F2002/30324—The prosthesis having different structural features at different locations within the same prosthesis differing in thickness
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- 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
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- 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
- A61F2002/30317—The prosthesis having different structural features at different locations within the same prosthesis
- A61F2002/30326—The prosthesis having different structural features at different locations within the same prosthesis differing in height or in length
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- A—HUMAN NECESSITIES
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- 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
- A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30579—Special structural features of bone or joint prostheses not otherwise provided for with mechanically expandable devices, e.g. fixation devices
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- 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
- A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30594—Special structural features of bone or joint prostheses not otherwise provided for slotted, e.g. radial or meridian slot ending in a polar aperture, non-polar slots, horizontal or arcuate slots
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- 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
- A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30604—Special structural features of bone or joint prostheses not otherwise provided for modular
- A61F2002/30616—Sets comprising a plurality of prosthetic parts of different sizes or orientations
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- A—HUMAN NECESSITIES
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- 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
- A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
- A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
- A61F2002/3082—Grooves
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- 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
- A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
- A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
- A61F2002/3082—Grooves
- A61F2002/30827—Plurality of grooves
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- A—HUMAN NECESSITIES
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- 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
- A61F2/32—Joints for the hip
- A61F2/36—Femoral heads ; Femoral endoprostheses
- A61F2/3609—Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts
- A61F2002/3625—Necks
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- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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- 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
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- A61F2/3609—Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts
- A61F2002/3625—Necks
- A61F2002/3631—Necks with an integral complete or partial peripheral collar or bearing shoulder at its base
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- A—HUMAN NECESSITIES
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- 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
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- A61F2/32—Joints for the hip
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- A61F2250/0014—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis
- A61F2250/0018—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis differing in elasticity, stiffness or compressibility
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- A61F2250/0036—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis differing in thickness
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- A61F2250/0037—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis differing in height or in length
Abstract
ABSTRACT OF THE DISCLOSURE
An implant fixation stem has a distal portion with a controlled stiffness. In one embodiment the deflection in response to a given force is equal to other similarly designed stems to give a surgeon consistent implantation feedback regardless of implant size. The deflection is preferably provided via a slot in the stem, the slot length being determined as a function of the stem's moment of inertia. Alternate embodiments provide for flutes of unequal length.
An implant fixation stem has a distal portion with a controlled stiffness. In one embodiment the deflection in response to a given force is equal to other similarly designed stems to give a surgeon consistent implantation feedback regardless of implant size. The deflection is preferably provided via a slot in the stem, the slot length being determined as a function of the stem's moment of inertia. Alternate embodiments provide for flutes of unequal length.
Description
2 ~-O~7 ~
BACKGROUND OF THE INVENTION
The present invention relates to an implant fixation stem such as for a prosthetic hip implant. More specifically this invention is concerned with controlling stem stiffness and stem implantation characteristics.
It is advantageous in hip replacement surgery to use an implant that fills the interior space of a femur as much as possible. To this end, a particular hip stem design is usually provided as a system having a variety of sizes. During surgery, the femur is hollowed with a rasp and the appropriately sized implant is then driven into the hollowed femur. However, the femur is curved so that there exists a tradeoff between the stem filling the femur and the stem being able to traverse the curve without undue resistance to implantation and pressure on the femur. It is known to reduce the stiffness of a stem by various means in order to ease implantation and avoid splitting the femur as it traverses the femoral curve. This is only a partial solution though, because as the stem size increases the stem stiffness increases, generally at an exponential rate. Therefore, larger stems are increasingly more difficult to implant. The prior art has failed to appreciate that it is important not only to control individual implant stiffness, but to control the relative stiffness between implants within an implant system having a range of stem sizes. This is so because as a surgeon is driving a stemmed implant into a hollowed bone he relies on the feedback of how easily the implant enters the hollow bone to determine if femoral damage is imminent and if the implant is well seated. With prior devices the feedback from a small implant is different from that of a large implant, making it difficult for the surgeon to develop a familiarity with the - 2~78~18 S~ E~_5U~ E INVEN~ION
It is therefore an object of this invention to provide a hip stem with controlled stiffness. It is a further object to control the stem stiffness in such a way that the feedback to the surgeon during implantation is uniform for a range of implant sizes thereby enabling the surgeon to develop a familiarity with the implantation procedure and consequently confidence in femoral safety and in seating the implant. It is another object of this invention to provide a hip stem that is easily inserted into the femur. These objects are realized in a hip stem having a slotted distal stem wherein the slot geometry is calculated to provide substantially the same stem deflection in response to a force for all stems in a range of sizes. Alternate embodiments of this hip stem have flutes of varying length in the distal stem to further control stiffness.
External and internal chamfers are present to ease insertion of the hip stem into the femur and to prevent metal-on-metal wear.
BRIEF DESCRIPTION OF THE DRAWING
In the drawings:
FIG. 1 is a lateral view of a right femoral hip implant.
FIG. 2 is an anterior view of the femoral hip implant of FIG. 1.
FIG. 3 is a detail view of the distal end of the hip implant of FIG. 1.
FIG. 4 is a diagram depicting a simple cantilever beam model upon which the calculations of this disclosure are based.
DETAILED DESCRIPTION OF THE INVENTION
Referring to the figures, a femoral hip implant according to this invention has a neck 1 and a stem 2 distal to the neck. The - 2~78818 stem 2 is designed to have a predetermined deflection in response to a predetermined force that is substantially the same as that of other similarly designed implants regardless of their respective sizes. This uniform stiffness causes all of the similar implants to present to a surgeon the same resistance to implantation so that the surgeon may be confident in the safety of a femur undergoing implantation and in the proper seating of the implant. In a preferred embodiment, the stiffness of the stem is controlled grossly via mass reducing flutes 11 and 12 and precisely via a slot lo 3. As shown in FIGS. 1 and 2, the lateral flute 11, which is loaded tensilely, is shorter in length than the anterior flute 12.
Preferably, the implant contains opposing and corresponding flutes on its posterior and medial aspects. The slot is preferably in the medial-lateral plane of the implant as shown. As the implant is inserted into the femur, one or both sides of the slot 3 may deflect inward to ease insertion. If one side of the slot 3 is modelled as a simple cantilever beam fixed along line A-A, then F~G. 4 diagrams the resulting design problem. In this case ~x 3FI (1) where deflection "y~" is produced by a force "F" in a beam of length "1" having a material property "E" and a section property "I". An implant designer, knswing a desired deflection "Y~x" for a given force "F", can design a system of implants to have uniform stem stiffness by making the slot 3 length "1" for each implant conform to 1 = [_ 3EIy ] 3 ( 2 ) Since the force "F" and deflection "y~" are held constant for all implants in the system, and assuming all the implants in the 2~7~18 system are made of the same material, the slot length is a function of the section property ~ for each implant 1 = fn [ I ] (3) The preferred implant has an exterior chamfer 4 and an interior chamfer 5 in addition to radii 6 and 7 at the end 8 of the stem 2. The exterior chamfer 4 permits easier insertion of the implant into the femur and allows the implant to move smoothly down the femur. The implant stem 2 is designed to fit closely within the femur. Therefore, it is preferable to limit the length of the exterior chamfer (to approximately 0.800") to provide pronounced lo relief (of approximately l.Smm) at the end 8 of the stem 2 and a rapid transition to the close fit between the stem and the interior of the femur. The exterior chamfer 4 may be the same for all sizes of the implant.
The interior chamfer 5 provides clearance so that the sides of the slot 3 do not touch and thereby limit deflection or allow fretting of the sides against one another. In contrast to the exterior chamfer 4, it is preferable to hav~ a relatively lon~
(approximately one-half the length of the slot 3 ) interior chamfer 5 to ensure that the sides of the slot 3 do not contact one another. The internal relief at the end of the slot is sized such that the slot will not close when subjected to a predetermined minimum load "F" (approximately 500 pounds). In order to take full advantage of the improved implantability and fit of this implant, - it is preferable to provide regions of curvature "B" and "C" that match the curvature of the femur. In addition, it is preferable to provide porous surfaces 9 to increase fixation strength by tissue ingrowth and a collar 10 to increase implant stability.
While the foregoing has described a preferred embodiment of the present invention, the specific dimensions disclosed are for illustrative purposes only. In addition, the invention can be employed with stemmed implants other than for use in the hip joint.
2~78~18 It will be understood by those skilled in the art that various modifications may be made to the preferred embodiment without departing from the spirit and scope of the invention defined by the appended claims.
BACKGROUND OF THE INVENTION
The present invention relates to an implant fixation stem such as for a prosthetic hip implant. More specifically this invention is concerned with controlling stem stiffness and stem implantation characteristics.
It is advantageous in hip replacement surgery to use an implant that fills the interior space of a femur as much as possible. To this end, a particular hip stem design is usually provided as a system having a variety of sizes. During surgery, the femur is hollowed with a rasp and the appropriately sized implant is then driven into the hollowed femur. However, the femur is curved so that there exists a tradeoff between the stem filling the femur and the stem being able to traverse the curve without undue resistance to implantation and pressure on the femur. It is known to reduce the stiffness of a stem by various means in order to ease implantation and avoid splitting the femur as it traverses the femoral curve. This is only a partial solution though, because as the stem size increases the stem stiffness increases, generally at an exponential rate. Therefore, larger stems are increasingly more difficult to implant. The prior art has failed to appreciate that it is important not only to control individual implant stiffness, but to control the relative stiffness between implants within an implant system having a range of stem sizes. This is so because as a surgeon is driving a stemmed implant into a hollowed bone he relies on the feedback of how easily the implant enters the hollow bone to determine if femoral damage is imminent and if the implant is well seated. With prior devices the feedback from a small implant is different from that of a large implant, making it difficult for the surgeon to develop a familiarity with the - 2~78~18 S~ E~_5U~ E INVEN~ION
It is therefore an object of this invention to provide a hip stem with controlled stiffness. It is a further object to control the stem stiffness in such a way that the feedback to the surgeon during implantation is uniform for a range of implant sizes thereby enabling the surgeon to develop a familiarity with the implantation procedure and consequently confidence in femoral safety and in seating the implant. It is another object of this invention to provide a hip stem that is easily inserted into the femur. These objects are realized in a hip stem having a slotted distal stem wherein the slot geometry is calculated to provide substantially the same stem deflection in response to a force for all stems in a range of sizes. Alternate embodiments of this hip stem have flutes of varying length in the distal stem to further control stiffness.
External and internal chamfers are present to ease insertion of the hip stem into the femur and to prevent metal-on-metal wear.
BRIEF DESCRIPTION OF THE DRAWING
In the drawings:
FIG. 1 is a lateral view of a right femoral hip implant.
FIG. 2 is an anterior view of the femoral hip implant of FIG. 1.
FIG. 3 is a detail view of the distal end of the hip implant of FIG. 1.
FIG. 4 is a diagram depicting a simple cantilever beam model upon which the calculations of this disclosure are based.
DETAILED DESCRIPTION OF THE INVENTION
Referring to the figures, a femoral hip implant according to this invention has a neck 1 and a stem 2 distal to the neck. The - 2~78818 stem 2 is designed to have a predetermined deflection in response to a predetermined force that is substantially the same as that of other similarly designed implants regardless of their respective sizes. This uniform stiffness causes all of the similar implants to present to a surgeon the same resistance to implantation so that the surgeon may be confident in the safety of a femur undergoing implantation and in the proper seating of the implant. In a preferred embodiment, the stiffness of the stem is controlled grossly via mass reducing flutes 11 and 12 and precisely via a slot lo 3. As shown in FIGS. 1 and 2, the lateral flute 11, which is loaded tensilely, is shorter in length than the anterior flute 12.
Preferably, the implant contains opposing and corresponding flutes on its posterior and medial aspects. The slot is preferably in the medial-lateral plane of the implant as shown. As the implant is inserted into the femur, one or both sides of the slot 3 may deflect inward to ease insertion. If one side of the slot 3 is modelled as a simple cantilever beam fixed along line A-A, then F~G. 4 diagrams the resulting design problem. In this case ~x 3FI (1) where deflection "y~" is produced by a force "F" in a beam of length "1" having a material property "E" and a section property "I". An implant designer, knswing a desired deflection "Y~x" for a given force "F", can design a system of implants to have uniform stem stiffness by making the slot 3 length "1" for each implant conform to 1 = [_ 3EIy ] 3 ( 2 ) Since the force "F" and deflection "y~" are held constant for all implants in the system, and assuming all the implants in the 2~7~18 system are made of the same material, the slot length is a function of the section property ~ for each implant 1 = fn [ I ] (3) The preferred implant has an exterior chamfer 4 and an interior chamfer 5 in addition to radii 6 and 7 at the end 8 of the stem 2. The exterior chamfer 4 permits easier insertion of the implant into the femur and allows the implant to move smoothly down the femur. The implant stem 2 is designed to fit closely within the femur. Therefore, it is preferable to limit the length of the exterior chamfer (to approximately 0.800") to provide pronounced lo relief (of approximately l.Smm) at the end 8 of the stem 2 and a rapid transition to the close fit between the stem and the interior of the femur. The exterior chamfer 4 may be the same for all sizes of the implant.
The interior chamfer 5 provides clearance so that the sides of the slot 3 do not touch and thereby limit deflection or allow fretting of the sides against one another. In contrast to the exterior chamfer 4, it is preferable to hav~ a relatively lon~
(approximately one-half the length of the slot 3 ) interior chamfer 5 to ensure that the sides of the slot 3 do not contact one another. The internal relief at the end of the slot is sized such that the slot will not close when subjected to a predetermined minimum load "F" (approximately 500 pounds). In order to take full advantage of the improved implantability and fit of this implant, - it is preferable to provide regions of curvature "B" and "C" that match the curvature of the femur. In addition, it is preferable to provide porous surfaces 9 to increase fixation strength by tissue ingrowth and a collar 10 to increase implant stability.
While the foregoing has described a preferred embodiment of the present invention, the specific dimensions disclosed are for illustrative purposes only. In addition, the invention can be employed with stemmed implants other than for use in the hip joint.
2~78~18 It will be understood by those skilled in the art that various modifications may be made to the preferred embodiment without departing from the spirit and scope of the invention defined by the appended claims.
Claims (9)
1. A system of stemmed implants, wherein each implant has a portion of its stem that exhibits a predetermined deflection in response to a predetermined force that is substantially equal to that of the other implants.
2. The system of claim 1 wherein each implant stem has a distal portion containing a slot.
3. The system of claim 2 wherein the slot is internally chamfered at its distal end.
4. The system of claim 3 wherein the slot is externally chamfered at its distal end.
5. The system of claim 4 wherein the slot is cut in the medial-lateral plane.
6. The system of claim 4 wherein the internal chamfer length is approximately equal to one-half the length of the slot and the external chamfer length is no greater than the internal chamfer length.
7. A femoral hip implant comprising a stem having an end defining a neck and an opposite rounded end, the rounded end containing a slot defining two sides, one side of the slot further being externally chamfered, the other side of the slot being internally chamfered such that the internal chamfer length is at least as long the external chamfer length.
8. The implant of claim 7 wherein the slot is cut in the medial-lateral plane.
9. A hip implant for insertion into a femur, the implant having aspects associated with the medial, lateral, anterior and posterior portions of the femur; the implant comprising a stem having a proximal end defining a neck and an opposite distal end; the stem portion adjacent the distal end containing medial, lateral, anterior and posterior flutes which extend proximally; the medial and lateral flute lengths being shorter than the anterior and posterior flute lengths.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US79428991A | 1991-11-19 | 1991-11-19 | |
US794,289 | 1991-11-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
CA2078818A1 true CA2078818A1 (en) | 1993-05-20 |
Family
ID=25162241
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002078818A Abandoned CA2078818A1 (en) | 1991-11-19 | 1992-09-22 | Implant fixation stem |
Country Status (5)
Country | Link |
---|---|
US (2) | US5507829A (en) |
EP (1) | EP0543099A3 (en) |
JP (1) | JPH05208028A (en) |
AU (1) | AU659195B2 (en) |
CA (1) | CA2078818A1 (en) |
Families Citing this family (60)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0543099A3 (en) * | 1991-11-19 | 1994-05-25 | Bristol Myers Squibb Co | Implant fixation stem |
ES2080648B1 (en) * | 1993-06-04 | 1996-10-16 | Levante Ind Quirurgicas | PERFECTED ANATOMIC HIP PROSTHESIS. |
US5653765A (en) * | 1994-07-01 | 1997-08-05 | Ortho Development Corporation | Modular prosthesis |
KR960006068A (en) * | 1994-07-29 | 1996-02-23 | 가네꼬 히사시 | Semiconductor device and manufacturing method thereof |
DE4441695A1 (en) * | 1994-11-23 | 1996-06-13 | Gerd Hoermansdoerfer | Anisotropically elastic hip joint endoprosthesis for implantation in narrow space of upper leg bone |
FR2735681A1 (en) * | 1995-06-22 | 1996-12-27 | Francis Demigneux | Non=cemented femoral prosthesis |
US5776204A (en) * | 1996-05-24 | 1998-07-07 | Howmedica Inc. | Asymmetric hip stem |
WO1998006359A1 (en) * | 1996-08-13 | 1998-02-19 | Grimes James B | Femoral head-neck prosthesis and method of implantation |
IT1290643B1 (en) * | 1997-01-17 | 1998-12-10 | Stefano Orsi | DISTAL TERMINAL FOR PRIMARY HIP PROSTHESIS STEM. |
US7255712B1 (en) * | 1997-04-15 | 2007-08-14 | Active Implants Corporation | Bone growth promoting implant |
DE19740689A1 (en) * | 1997-09-16 | 1999-03-18 | Franz Prof Dr Med Copf | Thigh prothesis |
ES2149089B1 (en) * | 1998-03-06 | 2001-05-16 | Lafitt Sa | IMPROVEMENTS IN THE FEMORAL VASTAGES. |
DE29810576U1 (en) * | 1998-04-30 | 1998-08-13 | Aesculap Ag & Co Kg | Shaft endoprosthesis |
GB9814267D0 (en) * | 1998-07-01 | 1998-09-02 | Johnson & Johnson Medical Ltd | Prosthetic component |
WO2000002504A1 (en) * | 1998-07-07 | 2000-01-20 | Stratec Medical Ag | Femur component for a hip endoprosthesis |
US6146424A (en) * | 1998-07-30 | 2000-11-14 | Sulzer Orthopedics Inc. | Offset press-fit tibial stem |
US6652591B2 (en) | 2000-12-14 | 2003-11-25 | Depuy Orthopaedics, Inc. | Prosthesis with feature aligned to trabeculae |
US6554865B2 (en) * | 2001-04-19 | 2003-04-29 | Wright Medical Technology, Inc. | Humeral stem with distal tri-slot |
US6783553B2 (en) | 2001-10-24 | 2004-08-31 | James B. Grimes | Prosthesis |
CN1596091A (en) | 2001-12-04 | 2005-03-16 | 迪斯酋有限公司 | Implants for load bearing applications |
US7494509B1 (en) | 2002-02-04 | 2009-02-24 | Biomet Manufacturing Corp. | Method and apparatus for providing a short-stemmed hip prosthesis |
ES2323775T3 (en) * | 2002-05-23 | 2009-07-24 | Active Implants Corporation | DENTAL AND ARTICULATION IMPLANTS. |
FR2842725B1 (en) * | 2002-07-26 | 2005-05-20 | Jean Louis Dore | RANGE OF FEMALE IMPLANTS OF HIP PROSTHESIS, IN PARTICULAR REPRISE. |
US6656187B1 (en) * | 2002-09-03 | 2003-12-02 | Depuy Products, Inc. | Adjustable orthopaedic instrument |
US20040078084A1 (en) * | 2002-10-22 | 2004-04-22 | Ricardo Albertorio | Prosthetic implant and method of use |
US8066777B2 (en) * | 2002-10-24 | 2011-11-29 | Biomet Manufacturing Corp. | Method and apparatus for wrist arthroplasty |
US8105389B2 (en) * | 2002-10-24 | 2012-01-31 | Biomet Manufacturing Corp. | Method and apparatus for wrist arthroplasty |
US8105388B2 (en) * | 2002-10-24 | 2012-01-31 | Biomet Manufacturing Corp. | Method and apparatus for wrist arthroplasty |
US6746486B1 (en) * | 2002-10-24 | 2004-06-08 | Biomet, Inc. | Method and apparatus for total wrist angled back carpal plate |
US8372154B2 (en) * | 2002-10-24 | 2013-02-12 | Biomet Manufacturing Corp. | Method and apparatus for wrist arthroplasty |
US8052756B2 (en) * | 2002-10-24 | 2011-11-08 | Biomet Manufacturing Corp. | Method and apparatus for wrist arthroplasty |
US8940055B2 (en) | 2002-10-24 | 2015-01-27 | Biomet Manufacturing, Llc | Method and apparatus for wrist arthroplasty |
US8821581B2 (en) * | 2002-10-24 | 2014-09-02 | Biomet Manufacturing, Llc | Method and apparatus for wrist arthroplasty |
US8105390B2 (en) | 2002-10-24 | 2012-01-31 | Biomet Manufacturing Corp. | Method and apparatus for wrist arthroplasty |
US6887278B2 (en) * | 2002-11-04 | 2005-05-03 | Mayo Foundation For Medical Education And Research | Prosthetic implant having segmented flexible stem |
US7033399B2 (en) * | 2003-08-22 | 2006-04-25 | Ortho Innovations, Inc. | Welded hip prosthesis |
US7892290B2 (en) * | 2004-05-28 | 2011-02-22 | Smith & Nephew, Inc. | Fluted sleeve hip prosthesis for modular stem |
WO2005117763A2 (en) * | 2004-05-28 | 2005-12-15 | Smith & Nephew, Inc. | Fluted intramedullary stem |
US8177703B2 (en) | 2005-06-06 | 2012-05-15 | The Cleveland Clinic Foundation | Blood pump |
US20070270863A1 (en) * | 2006-04-20 | 2007-11-22 | Sdgi Holdings, Inc. | Devices and methods for contouring an intervertebral space between vertebral members |
US20080027559A1 (en) * | 2006-07-31 | 2008-01-31 | Zimmer Technology, Inc. | Variable stiffness intramedullary stem |
US8562616B2 (en) | 2007-10-10 | 2013-10-22 | Biomet Manufacturing, Llc | Knee joint prosthesis system and method for implantation |
JP5448842B2 (en) | 2007-01-10 | 2014-03-19 | バイオメト マニファクチャリング コーポレイション | Knee joint prosthesis system and implantation method |
US8187280B2 (en) | 2007-10-10 | 2012-05-29 | Biomet Manufacturing Corp. | Knee joint prosthesis system and method for implantation |
US8163028B2 (en) | 2007-01-10 | 2012-04-24 | Biomet Manufacturing Corp. | Knee joint prosthesis system and method for implantation |
US8328873B2 (en) | 2007-01-10 | 2012-12-11 | Biomet Manufacturing Corp. | Knee joint prosthesis system and method for implantation |
US20080200990A1 (en) * | 2007-02-16 | 2008-08-21 | Mctighe Timothy | Tissue sparing implant |
US8062378B2 (en) * | 2007-03-26 | 2011-11-22 | Mx Orthopedics Corp. | Proximal self-locking long bone prosthesis |
US7857859B2 (en) * | 2007-06-13 | 2010-12-28 | Zimmer, Gmbh | Femur component for a hip joint prosthesis |
WO2010012048A1 (en) * | 2008-07-28 | 2010-02-04 | Silesco Pty Ltd | Orthopaedic device |
US8562690B1 (en) | 2010-04-22 | 2013-10-22 | Zimmer, Inc. | Modular revision femoral prosthesis |
US8623093B2 (en) | 2010-07-07 | 2014-01-07 | Zimmer, Inc. | Sleeve for modular revision hip stem |
US8906108B2 (en) * | 2012-06-18 | 2014-12-09 | DePuy Synthes Products, LLC | Dual modulus hip stem and method of making the same |
FR2994077B1 (en) * | 2012-08-06 | 2015-06-12 | Univ Bordeaux 1 | CONDYLIAN PROSTHESIS FOR TEMPOROMANDIBULAR JOINT |
CN104586496A (en) * | 2015-02-09 | 2015-05-06 | 张英泽 | Microporous bionic fracture fixing device capable of promoting fracture healing |
WO2016127522A1 (en) | 2015-02-09 | 2016-08-18 | 张英泽 | Porous bionic internal fixation apparatus for promoting fracture healing |
CN106880421B (en) * | 2015-12-16 | 2019-02-26 | 重庆润泽医药有限公司 | A kind of artificial hip joint |
CN106880420B (en) * | 2015-12-16 | 2019-02-19 | 重庆润泽医药有限公司 | A kind of bionic hip-joint |
CN106913397B (en) * | 2015-12-25 | 2019-02-19 | 重庆润泽医药有限公司 | A kind of Simple hip joint |
CN106913403B (en) * | 2015-12-25 | 2019-02-19 | 重庆润泽医药有限公司 | A kind of artificial hip joint |
Family Cites Families (36)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2636644A1 (en) * | 1976-08-13 | 1978-02-16 | Maschf Augsburg Nuernberg Ag | ENDOPROSTHESIS FOR JOINTS OF THE HUMAN MOTION APPARATUS |
DE3015690A1 (en) * | 1980-04-24 | 1981-10-29 | Waldemar Link (Gmbh & Co), 2000 Hamburg | HIP JOINT PROSTHESIS WITH A SHAFT TO BE INSERTED IN THE MARKING CHANNEL OF THE THIGH BONE |
FR2492253A1 (en) * | 1980-10-17 | 1982-04-23 | Breard Francis | SELF-LOCKING FEMALE PROSTHESIS |
CH650400A5 (en) * | 1981-12-08 | 1985-07-31 | Jean Butel | METHOD FOR MANUFACTURING A HIP PROSTHESIS WITH A FLEXIBLE ROD. |
US4770661A (en) * | 1982-01-18 | 1988-09-13 | Indong Oh | Conversion femoral endoprosthesis |
US4790854A (en) * | 1982-02-17 | 1988-12-13 | Howmedica International Inc. | Bone prosthesis assembly |
US4578081A (en) * | 1982-02-17 | 1986-03-25 | Howmedica International, Inc. | Bone prosthesis |
US4546501A (en) * | 1982-09-28 | 1985-10-15 | Gustilo Ramon B | Hip prosthesis |
FR2549717B1 (en) * | 1983-07-29 | 1987-05-07 | Cuilleron J | FEMALE ROD WITH FLEXIBLE CONTACTS FOR HIP PROSTHESIS |
CH662268A5 (en) * | 1984-03-06 | 1987-09-30 | Protek Ag | Hip joint prosthesis. |
CS245125B1 (en) * | 1984-11-09 | 1986-08-14 | Miroslav Petrtyl | Adaptable isoelastic hip endoprosthesis |
JPS62501960A (en) * | 1985-05-23 | 1987-08-06 | ラバ− フユ− エクスペリメンテル シル−ジ− シユバイツエリシエス フオ−チユングスインステイチユ−ト | Self-locking stem element for joint endoprosthesis |
FR2591885B1 (en) * | 1985-12-24 | 1990-06-15 | Mai Christian | SELF-LOCKING PROSTHESIS, METHODS OF MAKING AND IMPLEMENTING SAME |
CA1290099C (en) * | 1986-01-21 | 1991-10-08 | Thomas H. Mallory | Porous-coated artificial joints |
US5092899A (en) * | 1988-03-21 | 1992-03-03 | Mark Forte | Prosthesis with flexible intramedullary stem |
US5080685A (en) * | 1986-08-15 | 1992-01-14 | Boehringer Mannheim Corporation | Modular hip prosthesis |
DE3774799D1 (en) * | 1986-08-15 | 1992-01-09 | Boehringer Mannheim Corp., Indianapolis, Ind., Us | |
US4938774A (en) * | 1987-08-15 | 1990-07-03 | Laboratorium Fur Experimentelle Chirurgie | Dynamic self-locking stem for hip prosthesis |
US4813963A (en) * | 1987-08-24 | 1989-03-21 | Zimmer, Inc. | Femoral component for a hip prosthesis |
US5013324A (en) * | 1987-08-24 | 1991-05-07 | Zimmer, Inc. | Prosthetic implant with wrapped porous surface |
US4808186A (en) * | 1988-02-02 | 1989-02-28 | Boehringer Mannheim Corporation | Controlled stiffness femoral hip implant |
CH674307A5 (en) * | 1988-02-26 | 1990-05-31 | Sulzer Ag | |
CH675825A5 (en) * | 1988-08-15 | 1990-11-15 | Sulzer Ag | |
NZ230483A (en) * | 1988-08-31 | 1991-03-26 | Boehringer Mannheim Corp | Femoral implant with reduced cross-sectional area at the implants mid portion |
US4986834A (en) * | 1988-08-31 | 1991-01-22 | Boehringer Mannheim Corporation | Load sharing femoral hip implant |
GB2222776B (en) * | 1988-09-15 | 1992-12-02 | Mclardy Smith Peter David | A prosthesis |
CH676664A5 (en) * | 1989-01-10 | 1991-02-28 | Sulzer Ag | |
US4995883A (en) * | 1989-02-08 | 1991-02-26 | Smith & Nephew Richards Inc. | Modular hip prosthesis |
US5002581A (en) * | 1989-11-03 | 1991-03-26 | Dow Corning Wright Corporation | Modular hip joint prosthesis with adjustable anteversion |
US5002578A (en) * | 1990-05-04 | 1991-03-26 | Venus Corporation | Modular hip stem prosthesis apparatus and method |
US5007931A (en) * | 1990-05-04 | 1991-04-16 | Boehringer Mannheim Corporation | Porous coated prosthesis |
ES2081481T3 (en) * | 1990-06-01 | 1996-03-16 | Du Pont | ORTHOPEDIC IMPLANT OF COMPOSITE MATERIAL WITH VARIABLE MODULE. |
US5100407A (en) * | 1990-09-04 | 1992-03-31 | Pfizer Hospital Products Group, Inc. | Modular trial hip replacement system |
DE69228190T2 (en) * | 1991-10-07 | 1999-09-23 | Boehringer Mannheim Corp | FEMORAL HIP IMPLANT WITH REDUCED STIFFNESS |
EP0543099A3 (en) * | 1991-11-19 | 1994-05-25 | Bristol Myers Squibb Co | Implant fixation stem |
US5258035A (en) * | 1992-05-29 | 1993-11-02 | Intermedics Orthopedics, Inc. | Femoral prosthesis with wedge having opposed tapers |
-
1992
- 1992-09-05 EP EP19920115237 patent/EP0543099A3/en not_active Withdrawn
- 1992-09-08 AU AU22199/92A patent/AU659195B2/en not_active Ceased
- 1992-09-22 CA CA002078818A patent/CA2078818A1/en not_active Abandoned
- 1992-10-01 JP JP4263386A patent/JPH05208028A/en active Pending
-
1993
- 1993-01-21 US US08/006,327 patent/US5507829A/en not_active Expired - Lifetime
-
1995
- 1995-10-31 US US08/551,209 patent/US5702482A/en not_active Expired - Lifetime
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US5507829A (en) | 1996-04-16 |
JPH05208028A (en) | 1993-08-20 |
AU659195B2 (en) | 1995-05-11 |
US5702482A (en) | 1997-12-30 |
EP0543099A2 (en) | 1993-05-26 |
AU2219992A (en) | 1993-05-20 |
EP0543099A3 (en) | 1994-05-25 |
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