WO2000040178A1 - Coupling means for femur prosthesis - Google Patents
Coupling means for femur prosthesis Download PDFInfo
- Publication number
- WO2000040178A1 WO2000040178A1 PCT/BE2000/000001 BE0000001W WO0040178A1 WO 2000040178 A1 WO2000040178 A1 WO 2000040178A1 BE 0000001 W BE0000001 W BE 0000001W WO 0040178 A1 WO0040178 A1 WO 0040178A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- ball
- adaptor
- coupling means
- bore
- ball element
- Prior art date
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/02—Inorganic materials
- A61L27/04—Metals or alloys
- A61L27/045—Cobalt or cobalt alloys
-
- 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
- A61F2/3609—Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral 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
- A61F2002/30108—Shapes
- A61F2002/30199—Three-dimensional shapes
- A61F2002/30224—Three-dimensional shapes cylindrical
- A61F2002/30235—Three-dimensional shapes cylindrical tubular, e.g. sleeves
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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
- A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
- A61F2002/30331—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit
- A61F2002/30332—Conically- or frustoconically-shaped protrusion and recess
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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
- A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
- A61F2002/30331—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit
- A61F2002/30354—Cylindrically-shaped protrusion and recess, e.g. cylinder of circular basis
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- A—HUMAN NECESSITIES
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- 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
- A61F2002/30331—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit
- A61F2002/30362—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit with possibility of relative movement between the protrusion and the recess
- A61F2002/30364—Rotation about the common longitudinal axis
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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
- A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
- A61F2002/30474—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements using an intermediate sleeve interposed between both prosthetic parts to be coupled
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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
-
- 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
-
- 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
- A61F2002/30667—Features concerning an interaction with the environment or a particular use of the prosthesis
- A61F2002/30682—Means for preventing migration of particles released by the joint, e.g. wear debris or cement particles
- A61F2002/30685—Means for reducing or preventing the generation of wear particulates
-
- 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
- A61F2002/30795—Blind bores, e.g. of circular cross-section
-
- 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
- A61F2/3609—Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts
- A61F2002/3611—Heads or epiphyseal parts of femur
-
- 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
- A61F2/3609—Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts
- A61F2002/3625—Necks
-
- 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
- A61F2/3609—Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts
- A61F2002/365—Connections of heads to necks
-
- 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
-
- A—HUMAN NECESSITIES
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- 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
- A61F2220/0033—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementary-shaped recess, e.g. held by friction fit
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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- A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2230/0063—Three-dimensional shapes
- A61F2230/0069—Three-dimensional shapes cylindrical
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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- A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
- A61F2310/00005—The prosthesis being constructed from a particular material
- A61F2310/00011—Metals or alloys
- A61F2310/00023—Titanium or titanium-based alloys, e.g. Ti-Ni alloys
-
- A—HUMAN NECESSITIES
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- 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
- A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
- A61F2310/00005—The prosthesis being constructed from a particular material
- A61F2310/00011—Metals or alloys
- A61F2310/00029—Cobalt-based alloys, e.g. Co-Cr alloys or Vitallium
Definitions
- the invention relates to a coupling means for a femur prosthesis comprising an adaptor element and a ball element, which elements are each provided with a blind central bore, wherein the bore of the adaptor element is suitable in shape and dimension to enable placing over a fixed stem end of a femur prosthesis and wherein the bore of the ball element is suitable in shape and dimension to in turn enable placing over the adaptor element as according to the preamble of claim 1.
- Such coupling means are generally known. An example of such a coupling is disclosed in EP-A-0 147 339.
- Known coupling means with adaptor elements have the feature that the ball element is arranged fixedly on the adaptor element and the adaptor element is in turn coupled fixedly to the stem end of the femur prosthesis. Both elements are generally provided for this purpose with a truncated cone-shaped bore.
- the rotating coupling shown herein is however not spared considerable friction due to the large common surfaces rotating on one another and because of the material used, whereby wear soon occurs.
- the rotating coupling shown herein is however not provided with any adaptor element .
- the object of the present invention is to provide a coupling means which on the one hand has the advantages of an adaptor element which can be adjusted for instance in axial length and which on the other hand has the advantages of a rotating coupling and which is moreover mounted for rotation which is virtually frictionless .
- Another objective is to provide a coupling means with very little wear for the time period of the average age of a person. This ensures that such a coupling has to be arranged only once in the body and replacement need never have to take place.
- Another objective is to provide a coupling means which is easy to manufacture and to use, which can be obtained with known techniques of drilling and milling and which allows integral manufacture of both the adaptor element and the ball element.
- the invention provides a coupling means as according to claim 1.
- a coupling means comprises a ball element, the central blind bore of which is at least partially cylindrical, and a corresponding part of the sleeve of the adaptor element has a similar cylindrical form. This has the effect that when both elements are arranged one over the other the ball element is mounted rotatably relative to the adaptor element .
- the coupling means is embodied such that when the ball element is mounted over the adaptor element, these two elements are in continuous mutual contact only locally at one point. This has the effect that wear can only occur at this point. This point will generally be formed by a spherical upper surface of the adaptor element.
- the invention likewise relates to an assembly comprising a ball element and a number of adaptor elements, wherein at least two adaptor elements have a different height.
- the stem end of a femur prosthesis does not have to be shortened, while an appropriate length size can be obtained by choosing an adaptor element of a suitable height.
- the combined height of the stem end of the femur prosthesis and the adaptor element arranged thereover must generally correspond with the natural height of the collum femoris of the os femoris. Just as in nature the height of the collum femoris can differ in each person, different heights of adaptors are provided.
- Fig. 1 shows a schematic view of a femur prosthesis with a perspective exploded view of a preferred embodiment of a coupling means according to the invention
- Fig. 2 shows a cross-sectional view of a preferred embodiment of a coupling means according to the invention
- FIG. 3, 4 and 5 show cross-sectional views of other preferred embodiments of a coupling means according to the invention.
- Fig. 6 shows a cross-sectional view of an assembly according to the invention.
- a femur prosthesis 1 is bounded at the top by a stem end 2 which in the natural femur is the collum femoris.
- a coupling means 3 is provided on this stem end 2.
- the coupling means according to the invention consists of a ball element 4 provided with a blind central bore 5 and with an adaptor element 6, which adaptor element is likewise provided with a blind central bore 7.
- a stem end cap 8 can optionally be provided on stem end 2 of the femur prosthesis.
- the ball element consists in its top part of a spherical ball head 9 which transposes into a substantially cylindrical ball collar 10.
- the blind bore 5 of ball element 4 is preferably cylindrical, whereby the sleeve of the adaptor element must have a corresponding cylindrical form so as to form a rotation bearing. Ball element 4 can hereby rotate freely on the central axis AA' when it is mounted over the adaptor element. Ball collar 10 will ensure an additional fitting seating of ball element 4 over the adaptor element, whereby the freedom of the ball element is reduced.
- Adaptor element 6 is preferably provided with a truncated cone-shaped central bore 7.
- the stem end cap 8 is likewise truncated cone-shaped or cylindrical, whereby a non-rotating coupling is obtained between stem end cap 8 and adaptor element 6 when this latter has been placed on stem end 2 or stem end cap 8.
- the bore 5 of ball element 4 extends through the whole ball collar 10 into a considerable part of ball head 9.
- the adaptor element 6 is rounded on its top side 11, preferably arched or as in fig. 1 spherical, with a central summit 12.
- a suitable alloy wherein wear is further minimized is a metal alloy, in particular a cobalt chrome molybdenum alloy.
- Other metal alloys are likewise suitable, although a cobalt chrome molybdenum alloy has a good resistance to wear and is suitable for use in rotating bearings.
- Nitrogen 2,000 ppm maximum.
- Figures 3-6 show alternative embodiments of the coupling means according to the invention, wherein the ball element will likewise be in continuous contact with the adaptor element only locally at one point.
- Fig. 6 shows an assembly of a plurality of adaptor elements 6 and one ball element 4.
- Fig. 6 shows an assembly of a plurality of adaptor elements 6 and one ball element 4.
- the embodiment of fig. 6 shows an assembly according to the invention and illustrates clearly the different height of the adaptor elements with the same bore 7.
- the clearance between the diameter of bore 5 of ball element 6 and the outer diameter of the adaptor element is generally very small. This is particularly smaller than 0.02 mm and more preferably smaller than 0.01 mm. In preferred embodiments the difference between these two diameters is only 0.001 mm. This provides an ideal rotation bearing.
- the coupling means according to the invention has been tested in a motion experiment, wherein the coupling means was adjusted to a moving member with a movement similar to a natural step progression. This test showed that after 40,000 km no wear of any significance between the elements had occurred. This is clear confirmation that the coupling means according to the invention offers advantageous properties compared to the already known couplings .
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU19589/00A AU1958900A (en) | 1999-01-07 | 2000-01-05 | Coupling means for femur prosthesis |
EP00900186A EP1139926A1 (en) | 1999-01-07 | 2000-01-05 | Coupling means for femur prosthesis |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE9900010A BE1012379A5 (en) | 1999-01-07 | 1999-01-07 | CLUTCH FOR femoral prosthesis. |
BE9900010 | 1999-01-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000040178A1 true WO2000040178A1 (en) | 2000-07-13 |
Family
ID=3891686
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/BE2000/000001 WO2000040178A1 (en) | 1999-01-07 | 2000-01-05 | Coupling means for femur prosthesis |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1139926A1 (en) |
AU (1) | AU1958900A (en) |
BE (1) | BE1012379A5 (en) |
WO (1) | WO2000040178A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1506751A2 (en) * | 2003-07-03 | 2005-02-16 | Centerpulse Orthopedics Inc. | Femoral head assembly with variable offset |
WO2008048195A2 (en) * | 2006-10-20 | 2008-04-24 | Mustafa Altan Kabalak | Post-reduction adjustable modular hip prosthesis |
US8764845B2 (en) | 2007-03-28 | 2014-07-01 | Depuy International Limited | Head component of an orthopaedic joint prosthesis |
JP2015024091A (en) * | 2013-07-29 | 2015-02-05 | 京セラメディカル株式会社 | Component unit for hip prosthesis |
Citations (12)
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FR2041767A1 (en) * | 1969-05-30 | 1971-02-05 | Tornier Sa | |
US3658056A (en) * | 1968-04-25 | 1972-04-25 | Arnold H Huggler | Hip joint prosthesis |
US4032994A (en) * | 1975-06-03 | 1977-07-05 | Sulzer Brothers Limited | Hip joint prosthesis |
DE3033227A1 (en) * | 1980-09-04 | 1982-04-01 | Hubert 2000 Hamburg Berendes | Resilient artificial hip joint - has head and neck in one piece and containing cylindrical opening |
EP0147339A2 (en) * | 1983-12-08 | 1985-07-03 | Jean-Louis Brunet | Apparatus for producing a hip prosthesis |
FR2584603A1 (en) * | 1985-07-09 | 1987-01-16 | Brunet Jean Louis | PERFECTED HIP PROSTHESIS |
EP0385572A1 (en) * | 1989-02-28 | 1990-09-05 | Osteonics Corp. | Femoral head adaptor for assembly during surgery |
US5080679A (en) * | 1990-01-29 | 1992-01-14 | Techmedica, Inc. | Orthopedic junction for dissimilar materials |
US5156624A (en) * | 1991-09-06 | 1992-10-20 | Zimmer, Inc. | Head adaptor for hip prosthesis |
FR2689390A1 (en) * | 1991-05-28 | 1993-10-08 | Desmarquest Ceramiques Tech | Intermediate fastening for femoral head of hip joint prosthesis - comprises hollow pin with tapered external configuration and longitudinal dimensions calculated in relation to sizes of shaft and head. |
US5362311A (en) * | 1990-01-05 | 1994-11-08 | Kyocera Corporation | Artificial hip joint |
US5725597A (en) * | 1995-11-09 | 1998-03-10 | Hwang; Sung Kwan | Artificial hip-joint |
-
1999
- 1999-01-07 BE BE9900010A patent/BE1012379A5/en not_active IP Right Cessation
-
2000
- 2000-01-05 AU AU19589/00A patent/AU1958900A/en not_active Abandoned
- 2000-01-05 WO PCT/BE2000/000001 patent/WO2000040178A1/en not_active Application Discontinuation
- 2000-01-05 EP EP00900186A patent/EP1139926A1/en not_active Withdrawn
Patent Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3658056A (en) * | 1968-04-25 | 1972-04-25 | Arnold H Huggler | Hip joint prosthesis |
FR2041767A1 (en) * | 1969-05-30 | 1971-02-05 | Tornier Sa | |
US4032994A (en) * | 1975-06-03 | 1977-07-05 | Sulzer Brothers Limited | Hip joint prosthesis |
DE3033227A1 (en) * | 1980-09-04 | 1982-04-01 | Hubert 2000 Hamburg Berendes | Resilient artificial hip joint - has head and neck in one piece and containing cylindrical opening |
EP0147339A2 (en) * | 1983-12-08 | 1985-07-03 | Jean-Louis Brunet | Apparatus for producing a hip prosthesis |
FR2584603A1 (en) * | 1985-07-09 | 1987-01-16 | Brunet Jean Louis | PERFECTED HIP PROSTHESIS |
EP0385572A1 (en) * | 1989-02-28 | 1990-09-05 | Osteonics Corp. | Femoral head adaptor for assembly during surgery |
US5362311A (en) * | 1990-01-05 | 1994-11-08 | Kyocera Corporation | Artificial hip joint |
US5080679A (en) * | 1990-01-29 | 1992-01-14 | Techmedica, Inc. | Orthopedic junction for dissimilar materials |
FR2689390A1 (en) * | 1991-05-28 | 1993-10-08 | Desmarquest Ceramiques Tech | Intermediate fastening for femoral head of hip joint prosthesis - comprises hollow pin with tapered external configuration and longitudinal dimensions calculated in relation to sizes of shaft and head. |
US5156624A (en) * | 1991-09-06 | 1992-10-20 | Zimmer, Inc. | Head adaptor for hip prosthesis |
US5725597A (en) * | 1995-11-09 | 1998-03-10 | Hwang; Sung Kwan | Artificial hip-joint |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1506751A2 (en) * | 2003-07-03 | 2005-02-16 | Centerpulse Orthopedics Inc. | Femoral head assembly with variable offset |
EP1506751A3 (en) * | 2003-07-03 | 2005-12-28 | Centerpulse Orthopedics Inc. | Femoral head assembly with variable offset |
US7306629B2 (en) | 2003-07-03 | 2007-12-11 | Zimmer, Inc. | Femoral head assembly with variable offset |
US7833277B2 (en) | 2003-07-03 | 2010-11-16 | Zimmer, Inc. | Femoral head assembly with variable offset |
WO2008048195A2 (en) * | 2006-10-20 | 2008-04-24 | Mustafa Altan Kabalak | Post-reduction adjustable modular hip prosthesis |
WO2008048195A3 (en) * | 2006-10-20 | 2008-06-19 | Mustafa Altan Kabalak | Post-reduction adjustable modular hip prosthesis |
US8764845B2 (en) | 2007-03-28 | 2014-07-01 | Depuy International Limited | Head component of an orthopaedic joint prosthesis |
JP2015024091A (en) * | 2013-07-29 | 2015-02-05 | 京セラメディカル株式会社 | Component unit for hip prosthesis |
Also Published As
Publication number | Publication date |
---|---|
AU1958900A (en) | 2000-07-24 |
BE1012379A5 (en) | 2000-10-03 |
EP1139926A1 (en) | 2001-10-10 |
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