WO2008003597A1 - Implant - Google Patents

Implant Download PDF

Info

Publication number
WO2008003597A1
WO2008003597A1 PCT/EP2007/056211 EP2007056211W WO2008003597A1 WO 2008003597 A1 WO2008003597 A1 WO 2008003597A1 EP 2007056211 W EP2007056211 W EP 2007056211W WO 2008003597 A1 WO2008003597 A1 WO 2008003597A1
Authority
WO
WIPO (PCT)
Prior art keywords
implant
wall portion
implant according
curvature
radius
Prior art date
Application number
PCT/EP2007/056211
Other languages
German (de)
English (en)
Inventor
Andreas Stern
Original Assignee
Aesculap Ag & Co. Kg
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Aesculap Ag & Co. Kg filed Critical Aesculap Ag & Co. Kg
Publication of WO2008003597A1 publication Critical patent/WO2008003597A1/fr

Links

Classifications

    • 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
    • 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
    • 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
    • A61F2/367—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
    • A61F2/32—Joints for the hip
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3662—Femoral shafts
    • A61F2/3676—Distal or diaphyseal 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
    • A61F2002/30108—Shapes
    • A61F2002/3011—Cross-sections or two-dimensional shapes
    • 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
    • A61F2002/3011—Cross-sections or two-dimensional shapes
    • A61F2002/30112—Rounded shapes, e.g. with rounded corners
    • 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
    • A61F2002/3011—Cross-sections or two-dimensional shapes
    • A61F2002/30138—Convex polygonal shapes
    • A61F2002/30158—Convex polygonal shapes trapezoidal
    • 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
    • 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
    • A61F2002/30334—Cone of elliptical or oval basis
    • 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
    • A61F2002/30339—Double cones, i.e. connecting element having two conical connections, one at each of its opposite ends
    • 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
    • A61F2002/3053—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements having additional means for preventing unwanted connections
    • 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
    • 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
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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
    • A61F2/3609—Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts
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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
    • A61F2/3662—Femoral shafts
    • A61F2002/3678—Geometrical features
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    • A—HUMAN NECESSITIES
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    • 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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    • 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
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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
    • A61F2230/0002—Two-dimensional shapes, e.g. cross-sections
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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
    • A61F2230/0002—Two-dimensional shapes, e.g. cross-sections
    • A61F2230/0004—Rounded shapes, e.g. with rounded corners
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    • 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
    • A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2230/0002—Two-dimensional shapes, e.g. cross-sections
    • A61F2230/0017—Angular shapes
    • A61F2230/0026—Angular shapes trapezoidal

Definitions

  • the present invention relates to an implant comprising at least a first implant part and a second implant part connectable to the first implant part by means of a conical connection, wherein the first implant part has a conically shaped recess and the second implant part has a correspondingly or substantially correspondingly shaped and insertable into the recess and has a conically shaped projection in a connection position clamped or held in a press fit.
  • Implants of the type described above are known, for example, in the form or as parts of hip joint endoprostheses in which the first implant part is formed, for example, by a prosthesis stem and the second implant part by a neck element.
  • a firm connection between the two implant parts is ensured by the usually frusto-conical, ie conical projection, which is arranged on one of the two implant parts, and a recess corresponding to the projection on the other implant part.
  • the development proposed according to the invention has the advantage that the cone connection has a larger contact surface in the region of the first wall section, as a result of which, in particular, abrasion under high loads can be reduced.
  • cross-sectional geometries of implant parts can be optimally utilized.
  • curvature radii of wall sections can be maximized, preferably where larger loads are expected, larger radii of curvature for the wall sections of the cone connection can be selected.
  • the choice of different radii of curvature of the wall sections has the advantage that a connection between the two implant parts is unique to each other.
  • the first wall section merges directly into the second wall section.
  • the projection on the second implant part can be made particularly compact.
  • the first wall section is opposite to the second wall section or substantially opposite. Furthermore, as well as a highly symmetrical configuration of the projection and the corresponding recess is possible. In order to be able to form the largest possible projection and a correspondingly large recess in the case of elongate cross sections in order to increase the stability of the connection, it is favorable if at least one planar or substantially planar wall surface section is formed between the first and the second wall section. Thus, an available space can be used optimally to produce as large a contact surface as possible between the recess and the projection.
  • a remaining, surrounding the recess wall of the first implant part can be formed with a constant thickness, whereby with constant stability of a connection of the at least two implant parts surface contact and thus a stability over known implant systems is increased.
  • the at least one wall surface section extends at least in sections parallel or substantially parallel to an outer boundary surface of the first implant part.
  • a cross-sectional area of the first implant part can be optimally utilized in order to form a recess with the largest possible cross section.
  • the thickness of the remaining wall surrounding the recess can thus be kept constant, whereby a stability of the cone connection of the two implant parts is increased by the enlarged contact area between the recess and the projection.
  • an outer cross-sectional area of the first implant portion decreases from a proximal end toward a distal end.
  • Such an implant part is, for example, outstandingly suitable for serving as a shaft of a hip joint endoprosthesis which can be inserted into a corresponding recess of a femur bone.
  • a recess may, for example, form an optionally treated medullary cavity of the femur, which likewise decreases somewhat in cross-section starting from the hip joint.
  • An optimal adaptation of an implant to a recess into which it is to be inserted and whose width decreases in one direction can be achieved, in particular, by a width of a cross section of the first implant part at least in the region of the recess transversely to a connecting line between the first and decreases toward the second wall portion.
  • curvatures of the first and / or second wall section curvatures of an outer boundary surface of the first implant part are at least partially similar or if the first or second wall section parallel or substantially parallel to the outer boundary surface.
  • the outer boundary surface of the first implant part is to be understood in particular also the complete outer surface of the first implant part, that is, the entire outwardly of the recess facing away surface of the first implant part, or even only a surface portion of this entire outer surface.
  • the first wall portion has a radius of curvature in a range of 4 mm to 10 mm.
  • the first wall section has a radius of curvature in a range of 5 mm to 8 mm.
  • Such a curved wall section is suitable as a wall section for a multiplicity of applications, for example for hip joint endoprostheses.
  • the second wall portion has a radius of curvature in the range of 3 mm to 7 mm, which, however, is always smaller than a radius of curvature of the first wall portion.
  • the second wall section has a radius of curvature in a range of 3 mm to 5 mm. This makes it possible to equip very slim and small implants with a stable cone connection.
  • an inner cross-sectional area of the recess decreases starting from a proximal end of the first implant part in the direction of a distal end of the first implant part.
  • the desired conical connection can be achieved in a simple manner.
  • the projection has at least a first and a second outer conical cone wall portion and that a radius of curvature of the first cone wall portion is greater than a radius of curvature of the second cone wall portion.
  • the radii of curvature correspond the adjoining cone wall sections or wall sections of the second or first implant part.
  • first cone wall section and the second cone wall section point away from one another or substantially away from one another.
  • the first cone wall portion has a radius of curvature in a range of 4 mm to 10 mm. It is favorable if the radius of curvature of the cone wall section corresponds to the radius of curvature of the wall section against which it rests in the connection position.
  • the first cone wall section has a radius of curvature in a range of 5 mm to 8 mm.
  • the second cone wall portion has a radius of curvature in a range of 3 mm to 7 mm.
  • the radius of curvature of the second cone wall section corresponds to the radius of curvature of the wall section on which the second cone wall section abuts in the connection position.
  • the second cone wall section has a radius of curvature in a range of 3 mm to 5 mm.
  • a cross-section of the projection decreases in the direction of a distal end of the second implant part.
  • the implant in principle, it would be conceivable to use the implant at various points in a human or animal body.
  • provision may in particular be made for the implant to be a hip joint endoprosthesis and for the first implant to be a hip joint endoprosthesis. plantatteil in the form of a shaft and that the second implant part are formed in the form of a modular neck of the hip joint endoprosthesis.
  • This embodiment makes it possible to provide modular hip joint endoprostheses with an improved connection between the shaft and the neck part.
  • the modular neck part has a neck portion, to which the conically shaped projection is integrally formed on the distal side.
  • the modular neck part further carries a head part or can be connected to a head part of the hip joint endoprosthesis.
  • the head part may in particular be of spherical design in order to be able to form a ball joint with a corresponding hollow spherical socket.
  • the hip joint endoprosthesis is a short stem prosthesis. This makes it possible in particular to anchor the shaft of the hip joint endoprosthesis without the use of bone cement in a femur bone.
  • a shaft length of the shaft is a maximum of 15 cm.
  • FIG. 1 is a perspective view of a portion of a modular hip joint endoprosthesis.
  • FIG. Implants according to the invention can be used, for example, in spine surgery. Conceivable here would be a cone connection in particular between a voltage applied to a vertebral body portion of an intervertebral disc implant and a fixable thereto by means of the conical joint part. It would also be conceivable to connect modular knee prostheses, which consist of two or more parts, by means of a further developed cone connection according to the invention. However, implants according to the invention can also be used in the form of hip joint endoprostheses or parts thereof, which will be explained in detail with reference to the embodiment described in more detail below.
  • the FIGURE shows an implant according to the invention, provided overall with the reference numeral 10, which forms one or a part of a hip joint endoprosthesis.
  • the implant 10 has a modular construction and comprises at least two implant parts, namely a first implant part in the form of a shaft 12 which can be inserted into a prepared medullary canal of a femur bone and a neck part 14 which can be connected to the shaft 12 and forms a second implant part it is preferably a modular implant, that is, it can be connected differently shaped neck parts with different shaped shanks.
  • those elements which are provided to form a conical connection between the two implant parts are preferably identical, that is, there is preferably only one shape of a recess or only one shape of a projection corresponding to the recess.
  • the shaft has at its proximal end a conical recess 16 which is open in the proximal direction and which has a first conical wall section 18 and a second conical wall section which is substantially opposite the first wall section 18.
  • section 20 has.
  • the shaft 12 is shaped such that an outer cross-sectional area thereof decreases from its proximal end, in which the recess 16 is formed, towards a distal end 28. Further, a width of a cross section of the shaft 12 in the region of the recess 16 decreases transversely to a connecting line 30 between the first wall section 18 and the second wall section 20 in the direction of the latter. Consequently, a distance of the two wall surface portions 22 and 24 in the direction of the second wall portion 20 decreases.
  • Curvature radii of the two wall sections 18 and 20 are not identical. Curvature radii of the first wall portion 18 may be in particular in a range of 4 mm to 10 mm. In the embodiment shown in the figure, the radius of curvature of the first wall portion is 5.5 mm. The radius of curvature of the second wall portion 22 is less than the radius of curvature of the first wall portion 18 and may be in a range of 3 mm to 7 mm. In the embodiment shown in the figure, the radius of curvature of the second wall portion is 5 mm.
  • the recess 16 makes optimal use of a cross section of a shaft 12, because in the region of the widening cross section of the shaft 12, the First wall portion 18 have a maximum large radius of curvature, which is greater than the radius of curvature of the second wall portion 20th
  • the neck portion 14 has a projection 32 substantially corresponding to the recess 16 in the form of a conical pin, which is also referred to as an oval cone.
  • the projection comprises a first cone wall portion 34 and a second cone wall portion 36 facing away therefrom.
  • first and second cone wall portions 34 and 36 can merge directly with each other, in the embodiment shown in the figure, two planar portions 34 and 36 between the two cone wall portions or substantially flat cone wall surface portions 38 and 40 are formed, which abut against the wall surface portions 22 and 24 in a connecting position in which the projection 32 is inserted into the recess 16.
  • Curvature radii of the cone wall sections 34 and 36 substantially correspond to those of the wall sections 18 and 20 of the recess 16.
  • the radius of curvature of the first cone wall section 34 is greater than the radius of curvature of the second cone wall section 36, which directly results in the two substantially facing away from each other Konuswanddonabroughe 38 and 40 toward each other in the direction of the second cone wall portion 36, that is, a distance of the two cone wall surface portions 38 and 40 decreases in the direction of the second cone wall portion 36 from.
  • the angles of inclination of the wall sections 18 and 20 are somewhat shallower relative to a longitudinal axis defined by the recess 16 than the angles of inclination of the cone wall sections 34 and 36 with respect to a longitudinal axis defined by the projection 32.
  • an optimal contact of the projection 32 on inner surfaces of the recess 16 in the region of an upper edge of the recess 16 can be achieved.
  • the neck portion 14 is integrally formed as a whole, that is, the projection 32 is integrally formed on a neck portion 42, which in turn carries a frustoconical, rotationally symmetric cone 44 for connection to a condyle, not shown. If a whole set of neck parts is provided, these differ essentially in their neck sections, that is to say their position and / or angle relative to the projection 32 and their length, ie their extent between the cone 44 and the projection 32.
  • a conical, corresponding to the cone 44 recess is provided on the condyle.
  • a load of the cone connection of the implant 10 is usually in the form of a spatial alternating load, that is, the direction of the force action line is time-dependent. Consequently, the contact area within the cone connection is not consistent. Therefore, a round contact surface formed by wall sections 18 and 20 and to these corresponding cone wall sections 34 and 36, respectively as large a curvature as possible an optimal connection geometry with the highest possible congruence under changing load.

Landscapes

  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Cardiology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Transplantation (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Prostheses (AREA)

Abstract

L'invention concerne un implant comprenant au moins une première partie d'implant et une seconde partie d'implant pouvant être reliée à la première partie d'implant par l'intermédiaire d'une liaison conique. La première partie d'implant comporte un creux de forme conique, tandis que la seconde partie d'implant comporte une saillie de forme correspondant ou correspondant sensiblement au creux, qui peut être insérée dans ledit creux et maintenue dans une position de liaison par serrage ou par pression. L'objectif de l'invention est de perfectionner l'implant de telle manière qu'il présente une résistance accrue. À cet effet, le creux comporte au moins une première et une seconde sections de paroi coniques, et un rayon de courbure de la première section de paroi est supérieur à un rayon de courbure de la seconde section de paroi.
PCT/EP2007/056211 2006-07-03 2007-06-21 Implant WO2008003597A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102006031573.1 2006-07-03
DE102006031573A DE102006031573A1 (de) 2006-07-03 2006-07-03 Implantat
DE202006010535U DE202006010535U1 (de) 2006-07-03 2006-07-03 Implantat

Publications (1)

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WO2008003597A1 true WO2008003597A1 (fr) 2008-01-10

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Application Number Title Priority Date Filing Date
PCT/EP2007/056211 WO2008003597A1 (fr) 2006-07-03 2007-06-21 Implant

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DE (2) DE202006010535U1 (fr)
WO (1) WO2008003597A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2473184B (en) * 2009-08-27 2014-09-03 Biomet Uk Ltd A femoral neck prosthesis
FR2957517B1 (fr) * 2010-03-22 2012-04-06 Ceram Concept Llc Element de prothese et famille de protheses a col modulaire

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2697996A1 (fr) * 1992-11-17 1994-05-20 Medinov Sa Ensemble modulaire pour prothèse de hanche.
EP0773007A1 (fr) * 1995-11-07 1997-05-14 Aesculap Ag Capule de hanche endoprothétique
EP0797964A1 (fr) * 1996-03-26 1997-10-01 Groupe Lepine Ensemble d'éléments pour la constitution d'une prothése totale de la hanche
EP1350486A1 (fr) * 2002-04-04 2003-10-08 Aesculap AG & Co. KG Endoprothèse
EP1566155A1 (fr) * 2004-02-10 2005-08-24 Biomet France Prothèse de hanche à col modulaire

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2697996A1 (fr) * 1992-11-17 1994-05-20 Medinov Sa Ensemble modulaire pour prothèse de hanche.
EP0773007A1 (fr) * 1995-11-07 1997-05-14 Aesculap Ag Capule de hanche endoprothétique
EP0797964A1 (fr) * 1996-03-26 1997-10-01 Groupe Lepine Ensemble d'éléments pour la constitution d'une prothése totale de la hanche
EP1350486A1 (fr) * 2002-04-04 2003-10-08 Aesculap AG & Co. KG Endoprothèse
EP1566155A1 (fr) * 2004-02-10 2005-08-24 Biomet France Prothèse de hanche à col modulaire

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DE102006031573A1 (de) 2008-01-10
DE202006010535U1 (de) 2006-08-31

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