WO2007124607A1 - Shaft for a joint prosthesis - Google Patents

Shaft for a joint prosthesis Download PDF

Info

Publication number
WO2007124607A1
WO2007124607A1 PCT/CH2007/000198 CH2007000198W WO2007124607A1 WO 2007124607 A1 WO2007124607 A1 WO 2007124607A1 CH 2007000198 W CH2007000198 W CH 2007000198W WO 2007124607 A1 WO2007124607 A1 WO 2007124607A1
Authority
WO
WIPO (PCT)
Prior art keywords
shaft
longitudinal bore
joint prosthesis
retention
retention element
Prior art date
Application number
PCT/CH2007/000198
Other languages
German (de)
French (fr)
Inventor
Laszlo Prezmecky
Original Assignee
Laszlo Prezmecky
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 Laszlo Prezmecky filed Critical Laszlo Prezmecky
Publication of WO2007124607A1 publication Critical patent/WO2007124607A1/en

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
    • 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
    • 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
    • A61F2/40—Joints for shoulders
    • A61F2/4059—Humeral 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
    • A61F2002/30112—Rounded shapes, e.g. with rounded corners
    • A61F2002/30113—Rounded shapes, e.g. with rounded corners circular
    • 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
    • A61F2002/30143—Convex polygonal shapes hexagonal
    • 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
    • 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
    • A61F2002/30317—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
    • 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
    • A61F2002/30405—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by screwing complementary threads machined on the parts themselves
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30476—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism
    • A61F2002/30507—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism using a threaded locking member, e.g. a locking screw or a set screw
    • 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
    • A61F2002/30561—Special structural features of bone or joint prostheses not otherwise provided for breakable or frangible
    • 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
    • A61F2002/30579—Special structural features of bone or joint prostheses not otherwise provided for with mechanically expandable devices, e.g. fixation devices
    • 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
    • A61F2002/30772—Apertures or holes, e.g. of circular cross section
    • A61F2002/30784—Plurality of holes
    • A61F2002/30789—Plurality of holes perpendicular with respect to each other
    • 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
    • A61F2002/30797—Blind bores, e.g. of circular cross-section internally-threaded
    • 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
    • A61F2002/30822—Circumferential grooves
    • 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
    • A61F2/3094—Designing or manufacturing processes
    • A61F2002/30975—Designing or manufacturing processes made of two halves
    • 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
    • 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
    • A61F2002/3694—Geometrical features with longitudinal bores
    • 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
    • A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
    • A61F2/4637—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for connecting or disconnecting two parts of a prosthesis
    • A61F2002/4638—Tools for performing screwing, e.g. nut or screwdrivers, or particular adaptations therefor
    • 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
    • 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
    • A61F2230/0004—Rounded shapes, e.g. with rounded corners
    • A61F2230/0006—Rounded shapes, e.g. with rounded corners circular
    • 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
    • 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
    • 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
    • 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
    • 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
    • A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • 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
    • A61F2250/0037—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
    • 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
    • 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
    • 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
    • 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
    • A61F2310/00035—Other metals or alloys
    • A61F2310/00059—Chromium or Cr-based 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
    • 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
    • A61F2310/00179—Ceramics or ceramic-like structures
    • A61F2310/00185—Ceramics or ceramic-like structures based on metal oxides
    • A61F2310/00203—Ceramics or ceramic-like structures based on metal oxides containing alumina or aluminium oxide
    • 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
    • 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
    • A61F2310/00179—Ceramics or ceramic-like structures
    • A61F2310/00293—Ceramics or ceramic-like structures containing a phosphorus-containing compound, e.g. apatite
    • 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
    • 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
    • A61F2310/00329—Glasses, e.g. bioglass

Definitions

  • the present invention relates to a shaft for a joint prosthesis according to the preamble of claim 1.
  • joint prostheses and also shanks for joint prostheses such as hip joint prostheses, or shoulder or knee prostheses.
  • the prostheses can be roughly classified into two types, those implanted without bone cement and those implanted with bone cement.
  • a jaw implant which has retention elements, which are insertable into the implant and spreadable there. Important in this jaw implant is that the two-part retention element is held by a locking screw which is secured by a threaded shaft.
  • the embodiment relates to the shaft of a hip joint prosthesis, but it could just as well be a shaft for another prosthesis such as shoulder joint prosthesis or others.
  • FIG. 1 shows a longitudinal section of a shaft of a hip joint prosthesis during implantation
  • FIG. 2 shows the shaft of FIG. 1 in the fully implanted state
  • FIG. 5 is a section along the line VV in FIG. 2.
  • FIG. Fig. 1 shows the shaft 1 of a hip joint prosthesis, which has a shaft portion 2 and an angled neck 3, on which a joint ball 4 is attached.
  • the materials are known per se and may be known chromium-cobalt-steel alloys, while the ball joint may be either polyethylene or alumina ceramic.
  • the shaft 1 is inserted in a femur, the femur 5, which is not completely drawn and was also shown only schematically.
  • the shaft part 2 has a non-continuous longitudinal bore 6 with thread 7 in order to receive a threaded rod 8.
  • the threaded rod 8 see Fig. 3, has a conical tip 9 and on the opposite side a screw-10, which consists of a hexagon in the present example, but of course, other insertion means such as a slot or a Phillips be provided.
  • the threaded rod 8 is also made of a stainless material.
  • the shank part 2 has continuous transverse bores 11, 12, 13 and 14 as well as 22, 23 and 24 in order to receive retention elements 15 - 18, 25 - 27, see FIGS. 1, 2, 5 and 4.
  • the transverse bores 22-24 are here seen radially orthogonal to the other transverse bores, but all transverse bores can be arranged both radially and axially at an arbitrary angle to each other.
  • a retention element 15 consists of two parts 15A and 15B, which are separated by a groove 15C, which represents a predetermined breaking point.
  • the retention elements 15 - 18 and 25 - 27 have a different length and be executed symmetrically or asymmetrically with respect to the predetermined breaking point, depending on the type of shaft and depending on the location of the L-bore.
  • the retention elements are inserted into the transverse bores, then the shaft is inserted into the cavity 19 of the Fer ⁇ urs 5, whereupon the threaded rod 8 is screwed.
  • the tip 9 of the rod meets the predetermined breaking point of a
  • the length of the retention elements, or their individual parts and the diameter of the threaded rod are dimensioned such that after the screwing in of the threaded rod, the retention elements are driven into the bone. Of course not such that there is a risk that the bone can be blown up.
  • the spreading apart of the retention elements causes immediate stability of the joint shaft in the bone. In order to enable a better ingrowth of the bone, it is provided that the ends 20 of the retention elements are rounded.
  • a further measure to improve the growth of the bone can be achieved by attaching the bone tissue forming stimulating substances directly to the implant in order to achieve an improvement in the permanent anchoring of the retention elements.
  • the total length of the retention element is smaller than the length of the transverse bore receiving it, so that, see Fig. 1, on both sides the built-in retention elements, a cavity 21 is formed, which can be filled with the bone tissue formation stimulating substances.
  • any relevant substances such as hydroxyapatite or glass-ceramics or the like may be used as the bone tissue-forming stimulating substances.
  • substances based on ipriflavone are used, as are known from EP-B-638 321. Particularly good results were achieved with these substances.
  • stem for a hip joint prosthesis has been disclosed, but it will be readily apparent to one skilled in the art that another stem of another joint prosthesis will require different geometrical shapes and, in particular, the number of transverse holes noted here at seven. can vary. Likewise, the length and the ratio of the individual retention element parts to each other.

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

The shaft of a joint prosthesis features a longitudinal bore hole (6) with an internal screw thread (7) and through-going transverse bore holes (11 - 14) that traverse the longitudinal bore hole, in which retention elements (15 – 18), which are expandable by means of a threaded rod (8) that is positioned in the longitudinal bore hole (6), are arranged. Due to these expandable elements, the shaft can be cementlessly implanted and is still able to take weight bearing more rapidly than is the case with other known cementless implanted shafts.

Description

Schaft für GelenkprotheseShank for joint prosthesis
Die vorliegende Erfindung bezieht sich auf einen Schaft für eine Gelenkprothese gemäss Obergriff von Patentanspruch 1. Es gibt eine sehr grosse Anzahl von verschiedenenThe present invention relates to a shaft for a joint prosthesis according to the preamble of claim 1. There are a very large number of different
Gelenkprothesen und auch von Schäften für Gelenkprothesen, beispielsweise Hüftgelenkprothesen, oder Schulter- oder Knieprothesen. Im Allgemeinen lassen sich die Prothesen grob in zwei Arten klassieren, solche, die ohne Knochenzement implantiert werden und solche, die mit Knochenzement implantiert werden.Joint prostheses and also shanks for joint prostheses, such as hip joint prostheses, or shoulder or knee prostheses. In general, the prostheses can be roughly classified into two types, those implanted without bone cement and those implanted with bone cement.
Schäfte, die ohne Knochenzement implantiert werden, weisen entweder Tragrippen auf oder sind derart beschaffen, dass sie beim Hineinbringen in den Hohlraum sich durch ihre äussere Form bedingt verkeilen. Zementlos implantierbare Prothesen haben den Vorteil, dass nach dem Heranwachsen des Knochens die Prothese im Prinzip sehr lange halten kann, ohne Lockerungserscheinungen zu zeigen, während der Nachteil darin liegt, dass das Anwachsen des Knochens eine grosseShafts that are implanted without bone cement have either support ribs or are such that they wedge conditionally when brought into the cavity by their outer shape. Cementless implantable prostheses have the advantage that after the growth of the bone, the prosthesis in principle can last a very long time, without showing signs of loosening, while the disadvantage is that the growth of the bone a large
Zeit beansprucht, der Patient daher die Prothese lange nicht belasten kann. Prothesen, die sich auf Grund ihrer äusseren Geometrie verkeilen, haben den Nachteil, dass durch das Hineinbringen der Prothese der Knochen gesprengt werden kann .As a result, the patient can not stress the prosthesis for a long time. Prostheses that become wedged due to their external geometry have the disadvantage that the bone can be broken by inserting the prosthesis.
Während die mit Knochenzement implantierten Implantate den Vorteil haben, relativ rasch belastbar zu sein, haben diese den Nachteil, dass in vielen Fällen der Zementköcher bricht und die Prothese dadurch gelockert wird, wodurch eineWhile implanted with bone cement implants have the advantage of being relatively quickly resilient, they have the disadvantage that in many cases, the cement quiver breaks and the prosthesis is thereby loosened, creating a
Nachoperation notwendig wird.After surgery becomes necessary.
Aus der EP-A-I 018 319 des gleichen Anmelders ist ein Kieferimplantat bekannt, das Retentionselemente aufweist, die in das Implantat einführbar und dort spreizbar sind. Wichtig bei diesem Kieferimplantat ist, dass das aus zwei Teilen bestehende Retentionselement durch eine Verriegelungsschraube gehalten ist, die von einem Gewindeschaft gesichert wird.From EP-AI 018 319 of the same applicant, a jaw implant is known which has retention elements, which are insertable into the implant and spreadable there. Important in this jaw implant is that the two-part retention element is held by a locking screw which is secured by a threaded shaft.
Es ist von diesem Stand der Technik ausgehend Aufgabe der vorliegenden Erfindung, einen Schaft für eine Gelenkprothese anzugeben, der zwar zementlos implantiert werden kann, jedoch schon von Beginn weg eine gute Haftung aufweist. Diese Aufgabe wird mit dem Schaft gemäss Patentanspruch 1 gelöst. Es ist eine weitere Aufgabe der Erfindung, Mittel vorzusehen, die das Anwachsen des Knochens beschleunigen. Diese weitere Aufgabe wird mit dem Schaft gemäss Anspruch 4 gelöst.It is from this prior art starting task of the present invention to provide a shaft for a joint prosthesis, which may indeed be implanted without cement, but already from the beginning has a good adhesion. This object is achieved with the shaft according to claim 1. It is a further object of the invention to provide means for accelerating the growth of the bone. This further object is achieved with the shaft according to claim 4.
Die Erfindung wird im Folgenden anhand von Zeichnungen eines Ausführungsbeispiels näher erläutert. Dabei bezieht sich das Ausführungsbeispiel auf den Schaft einer Hüftgelenkprothese, doch könnte es ebensogut ein Schaft für eine andere Prothese wie Schultergelenkprothese oder andere sein.The invention will be explained in more detail below with reference to drawings of an embodiment. Here, the embodiment relates to the shaft of a hip joint prosthesis, but it could just as well be a shaft for another prosthesis such as shoulder joint prosthesis or others.
Fig. 1 zeigt in einem Längsschnitt einen Schaft einer Hüftgelenkprothese während dem Implantieren,1 shows a longitudinal section of a shaft of a hip joint prosthesis during implantation,
Fig. 2 zeigt den Schaft von Fig. 1 im vollständig implantierten Zustand,FIG. 2 shows the shaft of FIG. 1 in the fully implanted state, FIG.
Fig. 3 ist eine Ausschnittsvergrösserung des3 is a partial enlargement of the
Gewindestabes von Fig. 1,Threaded rod of Fig. 1,
Fig. 4 ist eine Ausschnittsvergrösserung eines Retentionselementes, und4 is an enlarged detail of a retention element, and
Fig. 5 ist ein Schnitt gemäss der Linie V-V in Fig. 2. Fig. 1 zeigt den Schaft 1 einer Hüftgelenkprothese, der einen Schaftteil 2 und einen dazu abgewinkelten Hals 3 aufweist, auf den eine Gelenkkugel 4 aufgesteckt ist. Die Materialien sind an sich bekannt und können bekannte Chrom- Kobalt-Stahl-Legierungen sein, während die Gelenkkugel entweder aus Polyäthylen oder Aluminiuiαoxyd-Keramik sein kann.FIG. 5 is a section along the line VV in FIG. 2. FIG. Fig. 1 shows the shaft 1 of a hip joint prosthesis, which has a shaft portion 2 and an angled neck 3, on which a joint ball 4 is attached. The materials are known per se and may be known chromium-cobalt-steel alloys, while the ball joint may be either polyethylene or alumina ceramic.
Der Schaft 1 steckt in einem Oberschenkelknochen, dem Femur 5, der nicht vollständig eingezeichnet ist und auch nur schematisch dargestellt wurde. Der Schaftteil 2 weist eine nicht durchgehende Längsbohrung 6 mit Gewinde 7 auf, um einen Gewindestab 8 aufzunehmen.The shaft 1 is inserted in a femur, the femur 5, which is not completely drawn and was also shown only schematically. The shaft part 2 has a non-continuous longitudinal bore 6 with thread 7 in order to receive a threaded rod 8.
Der Gewindestab 8, siehe Fig. 3, weist eine konische Spitze 9 und auf der entgegengesetzten Seite ein Eindrehmittel 10 auf, das in vorliegendem Beispiel aus einem Sechskant besteht, doch können selbstverständlich auch andere Eindrehmittel wie ein Schlitz oder ein Kreuzschlitz vorgesehen sein. Der Gewindestab 8 ist ebenfalls aus einem rostfreien Material gefertigt.The threaded rod 8, see Fig. 3, has a conical tip 9 and on the opposite side a screw-10, which consists of a hexagon in the present example, but of course, other insertion means such as a slot or a Phillips be provided. The threaded rod 8 is also made of a stainless material.
Der Schaftteil 2 weist gemäss den Figuren 1, 2 oder 5 durchgehende Querbohrungen 11, 12, 13 und 14 sowie 22, 23 und 24 auf, um Retentionselemente 15 - 18, 25 - 27 aufzunehmen, siehe Figuren 1, 2, 5 und 4. Die Querbohrungen 22 - 24 sind hier radial gesehen orthogonal zu den anderen Querbohrungen eingezeichnet, doch können sämtliche Querbohrungen jeweils sowohl radial als auch axial in einen beliebigen Winkel zueinander angeordnet sein.According to FIGS. 1, 2 or 5, the shank part 2 has continuous transverse bores 11, 12, 13 and 14 as well as 22, 23 and 24 in order to receive retention elements 15 - 18, 25 - 27, see FIGS. 1, 2, 5 and 4. The transverse bores 22-24 are here seen radially orthogonal to the other transverse bores, but all transverse bores can be arranged both radially and axially at an arbitrary angle to each other.
Wie aus Fig. 4 hervorgeht, besteht ein Retentionselement 15 aus zwei Teilen 15A und 15B, die durch eine Nut 15C getrennt sind, die eine Sollbruchstelle darstellt. Wie aus den Figuren 1, 2 und 5 hervorgeht, können die Retentionselemente 15 - 18 und 25 - 27 eine unterschiedliche Länge haben und bezüglich der Sollbruchstelle symmetrisch oder asymmetrisch ausgeführt sein, je nach Art des Schaftes und je nach Ort der L-ängsbohrung .As is apparent from Fig. 4, a retention element 15 consists of two parts 15A and 15B, which are separated by a groove 15C, which represents a predetermined breaking point. As can be seen from Figures 1, 2 and 5, the retention elements 15 - 18 and 25 - 27 have a different length and be executed symmetrically or asymmetrically with respect to the predetermined breaking point, depending on the type of shaft and depending on the location of the L-bore.
Vor dem Implantieren werden die Retentionselemente in die Querbohrungen gesteckt, dann wird der Schaft in den Hohlraum 19 des Ferαurs 5 eingebracht, woraufhin der Gewindestab 8 eingedreht wird. Beim Eindrehen des Gewindestabs trifft die Spitze 9 des Stabes auf die Sollbruchstelle einesBefore implantation, the retention elements are inserted into the transverse bores, then the shaft is inserted into the cavity 19 of the Ferαurs 5, whereupon the threaded rod 8 is screwed. When screwing the threaded rod, the tip 9 of the rod meets the predetermined breaking point of a
Retentionselementes und bewirkt beim weiteren Hineindrehen dort einen Bruch und damit das Spreizen derRetention element and causes the further screwing in there a break and thus the spreading of the
Retentionselement-Teile in den Knochen. Dies geht aus Fig. 1 hervor, wo der Gewindestab am fünften Retentionselement von oben angreift, um dieses zu spalten und zu spreizen.Retention element parts in the bones. This is apparent from Fig. 1, where the threaded rod on the fifth retention element engages from above, in order to split and spread.
Die Länge der Retentionselemente, bzw. deren Einzelteile sowie der Durchmesser des Gewindestabes sind derart bemessen, dass nach dem Hineindrehen des Gewindestabes die Retentionselemente in den Knochens hineingetrieben werden. Selbstverständlich nicht derart, dass Gefahr besteht, dass der Knochen gesprengt werden kann. Das Auseinanderspreizen der Retentionselemente bewirkt eine sofortige Stabilität des Gelenkschaftes im Knochen. Um ein besseres Hineinwachsen des Knochens zu ermöglichen ist es vorgesehen, dass die Enden 20 der Retentionselemente abgerundet sind.The length of the retention elements, or their individual parts and the diameter of the threaded rod are dimensioned such that after the screwing in of the threaded rod, the retention elements are driven into the bone. Of course not such that there is a risk that the bone can be blown up. The spreading apart of the retention elements causes immediate stability of the joint shaft in the bone. In order to enable a better ingrowth of the bone, it is provided that the ends 20 of the retention elements are rounded.
Eine weitere Massnahme zur Verbesserung des Anwachsens des Knochens kann dadurch erzielt werden, dass die Knochengewebebildung stimulierende Substanzen direkt am Implantat angebracht werden, um eine Verbesserung der dauerhaften Verankerung der Retentionselemente zu erzielen. Zu diesem Zwecke ist vorgesehen, dass die Gesamtlänge des Retentionselementes kleiner ist als die Länge der sie aufnehmenden Querbohrung, so dass, siehe Fig. 1, beiderseits der eingebauten Retentionselemente ein Hohlraum 21 entsteht, der mit die Knochengewebebildung stimulierenden Substanzen gefüllt werden kann.A further measure to improve the growth of the bone can be achieved by attaching the bone tissue forming stimulating substances directly to the implant in order to achieve an improvement in the permanent anchoring of the retention elements. For this purpose, it is provided that the total length of the retention element is smaller than the length of the transverse bore receiving it, so that, see Fig. 1, on both sides the built-in retention elements, a cavity 21 is formed, which can be filled with the bone tissue formation stimulating substances.
Als die Knochengewebebildung stimulierende Substanzen können im Prinzip alle einschlägig wirksamen Substanzen wie Hydroxylapatit oder Glaskeramiken oder dergleichen verwendet werden. Vorzugsweise sind jedoch Substanzen auf Ipriflavonbasis einzusetzen, wie sie aus der EP-B-638 321 bekannt sind. Mit diesen Substanzen wurden besonders gute Resultate erzielt.In principle, any relevant substances such as hydroxyapatite or glass-ceramics or the like may be used as the bone tissue-forming stimulating substances. Preferably, however, substances based on ipriflavone are used, as are known from EP-B-638 321. Particularly good results were achieved with these substances.
Wie eingangs ausgeführt, wurde ein Ausführungsbeispiel eines Schaftes für eine Hüftgelenkprothese offenbart, doch ist es für einen Fachmann ohne weiteres nachvollziehbar, dass für einen Schaft einer anderen Gelenkprothese andere geometrische Formen erforderlich sind und insbesondere die Anzahl der Querbohrungen, die hier mit sieben angegeben wurde, variieren kann. Desgleichen die Länge und das Verhältnis der einzelnen Retentionselement-Teile zueinander. As previously mentioned, one embodiment of a stem for a hip joint prosthesis has been disclosed, but it will be readily apparent to one skilled in the art that another stem of another joint prosthesis will require different geometrical shapes and, in particular, the number of transverse holes noted here at seven. can vary. Likewise, the length and the ratio of the individual retention element parts to each other.

Claims

Patentansprüche claims
1. Schaft einer Gelenkprothese, dadurch gekennzeichnet, dass er eine Längsbohrung (6) mit Innengewinde (7) und durchgehende, die Längsbohrung durchquerende Querbohrungen (11 - 14, 22 - 24) aufweist, in denen Retentionselemente (15 - 18, 25 - 27) angeordnet sind, die durch einen in der Längsbohrung (6) geführten Gewindestab (8) spreizbar sind.Shaft of a joint prosthesis, characterized in that it has a longitudinal bore (6) with internal thread (7) and continuous, the longitudinal bore traversing transverse bores (11 - 14, 22 - 24), in which retention elements (15 - 18, 25 - 27 ) are arranged, which can be spread by a in the longitudinal bore (6) guided threaded rod (8).
2. Schaft nach Anspruch 1, dadurch gekennzeichnet, dass das Retentionselement (15 - 18, 22 - 24) ein abgerundetes Ende (20) und eine Sollbruchstelle (15C) aufweist.2. Shank according to claim 1, characterized in that the retention element (15-18, 22-24) has a rounded end (20) and a predetermined breaking point (15C).
3. Schaft nach Anspruch 2, dadurch gekennzeichnet, dass die Retentionselemente für einen Schaft und die3. Shank according to claim 2, characterized in that the retention elements for a shaft and the
Retentionselement-Teile beiderseits der Sollbruchstelle unterschiedliche Längen aufweisen.Retention element parts on both sides of the predetermined breaking point have different lengths.
4. Schaft nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Länge eines Retentionselementes kleiner ist als die dieses Teil aufnehmende Querbohrung, um einen Hohlraum (21) zur Aufnahme einer die Knochengewebebildung begünstigende Substanz zu schaffen.4. Shank according to one of claims 1 to 3, characterized in that the length of a retention element is smaller than the part receiving this transverse bore to create a cavity (21) for receiving a substance promoting bone tissue formation.
5. Schaft nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Querbohrungen (11 - 14, 22 - 24) jeweils bezüglich der Längsmittelachse des Schaftes sowohl radial als auch axial beliebig zueinander ausgerichtet sind. 5. Shaft according to one of claims 1 to 4, characterized in that the transverse bores (11 - 14, 22 - 24) are each aligned with respect to the longitudinal center axis of the shaft both radially and axially arbitrarily to each other.
PCT/CH2007/000198 2006-04-28 2007-04-24 Shaft for a joint prosthesis WO2007124607A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH707/06 2006-04-28
CH7072006 2006-04-28

Publications (1)

Publication Number Publication Date
WO2007124607A1 true WO2007124607A1 (en) 2007-11-08

Family

ID=38266682

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CH2007/000198 WO2007124607A1 (en) 2006-04-28 2007-04-24 Shaft for a joint prosthesis

Country Status (1)

Country Link
WO (1) WO2007124607A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011055106B3 (en) * 2011-11-07 2013-04-11 Danijela Müller-Zivkovic Hip prosthesis for total hip replacement applications during e.g. orthopedics, has shank with anchorage element transferred from inactive position into active position, where element is formed as cam rotatably supported in recess of shank
WO2021103442A1 (en) * 2019-11-28 2021-06-03 佛山市逸合生物科技有限公司 Femoral stem
CN117257429A (en) * 2023-11-21 2023-12-22 苏州爱得科技发展股份有限公司 pedicle screw

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3024785A (en) * 1959-06-10 1962-03-13 Dobelle Martin Femoral head prosthesis
DE2305442A1 (en) * 1973-02-03 1974-08-08 Rosenthal Stemag Tech Keramik IMPLANT FOR FASTENING INSIDE TUBE BONES
WO1997048352A1 (en) * 1996-06-18 1997-12-24 Mehran Kasra Bone prosthesis fixation device and methods of using same
US5702481A (en) * 1995-05-16 1997-12-30 Lin; Chih-I Bone marrow cavity fixation device for treating a fractured bone
EP1018319A1 (en) * 1999-01-08 2000-07-12 Lászlo Dr. Prezmecky Jaw implant

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3024785A (en) * 1959-06-10 1962-03-13 Dobelle Martin Femoral head prosthesis
DE2305442A1 (en) * 1973-02-03 1974-08-08 Rosenthal Stemag Tech Keramik IMPLANT FOR FASTENING INSIDE TUBE BONES
US5702481A (en) * 1995-05-16 1997-12-30 Lin; Chih-I Bone marrow cavity fixation device for treating a fractured bone
WO1997048352A1 (en) * 1996-06-18 1997-12-24 Mehran Kasra Bone prosthesis fixation device and methods of using same
EP1018319A1 (en) * 1999-01-08 2000-07-12 Lászlo Dr. Prezmecky Jaw implant

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011055106B3 (en) * 2011-11-07 2013-04-11 Danijela Müller-Zivkovic Hip prosthesis for total hip replacement applications during e.g. orthopedics, has shank with anchorage element transferred from inactive position into active position, where element is formed as cam rotatably supported in recess of shank
WO2021103442A1 (en) * 2019-11-28 2021-06-03 佛山市逸合生物科技有限公司 Femoral stem
CN117257429A (en) * 2023-11-21 2023-12-22 苏州爱得科技发展股份有限公司 pedicle screw
CN117257429B (en) * 2023-11-21 2024-01-30 苏州爱得科技发展股份有限公司 Pedicle screw

Similar Documents

Publication Publication Date Title
DE2454181C3 (en) Ceramic implant
DE10260222B4 (en) Tubular element for an implant and implant to be used in spine or bone surgery with such an element
EP0283706B1 (en) Hip prosthesis
DE69729140T2 (en) Instrumentation for the implantation of a surgical implant
DE69637271T2 (en) Truncated conical spondylodesis implants
EP0792127B1 (en) Joint prosthesis
AT390183B (en) BONE IMPLANT FOR ENDOPROTHESIS
DE2854334C3 (en) Thigh-hip joint endoprosthesis
WO2009007803A2 (en) Prosthesis for part of a joint, with an expandable shaft
DE3340767A1 (en) KIT FOR A RESECTION PROSTHESIS
DE8611697U1 (en) Kit for a stem prosthesis
EP0792128A1 (en) Modular artificial hip joint
DE202011001474U1 (en) Self-tapping screw implant
DE3336005C2 (en)
EP1276440B1 (en) Femoral neck prosthesis
EP1572018B1 (en) Fracture pin
EP3193756A1 (en) Osteosynthesis aid for the care of subtrochanteric fractures and/or pertrochanteric fractures and/or femoral neck fractures
EP0669116A1 (en) Femoral part for a hip joint endoprosthesis
WO2007124607A1 (en) Shaft for a joint prosthesis
DE3737372A1 (en) IMPLANTABLE hip joint prosthesis
DD293485A5 (en) INTRAMEDULLAERE OSTEOSYNTHESESPINDEL
EP0339320A2 (en) Shaft for a prosthesis
EP1713411B1 (en) Dental implant
DE3819948C2 (en)
DE10130366A1 (en) Hip joint endoprothesis consists of a ball section with inner and outer sections and a shaft which is connected to it

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 07720095

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 07720095

Country of ref document: EP

Kind code of ref document: A1