WO1999012499A1 - Prosthetic member - Google Patents

Prosthetic member Download PDF

Info

Publication number
WO1999012499A1
WO1999012499A1 PCT/EP1997/004825 EP9704825W WO9912499A1 WO 1999012499 A1 WO1999012499 A1 WO 1999012499A1 EP 9704825 W EP9704825 W EP 9704825W WO 9912499 A1 WO9912499 A1 WO 9912499A1
Authority
WO
WIPO (PCT)
Prior art keywords
anchoring
shaft
prosthesis part
support plate
prosthesis
Prior art date
Application number
PCT/EP1997/004825
Other languages
German (de)
French (fr)
Inventor
Franz Copf
Srecko Herman
Wolfgang KÜSSWETTER
Original Assignee
Franz Copf
Srecko Herman
Kuesswetter Wolfgang
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
Priority to DE19610729A priority Critical patent/DE19610729A1/en
Application filed by Franz Copf, Srecko Herman, Kuesswetter Wolfgang filed Critical Franz Copf
Priority to PCT/EP1997/004825 priority patent/WO1999012499A1/en
Priority to EP97919038A priority patent/EP1028674A1/en
Publication of WO1999012499A1 publication Critical patent/WO1999012499A1/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
    • 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
    • A61F2/28—Bones
    • A61F2002/2835—Bone graft implants for filling a bony defect or an endoprosthesis cavity, e.g. by synthetic material or biological material
    • 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
    • A61F2002/30112—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
    • A61F2002/30158—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
    • A61F2002/30108—Shapes
    • A61F2002/30199—Three-dimensional shapes
    • A61F2002/30273—Three-dimensional shapes pyramidal
    • 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
    • A61F2002/30327—The prosthesis having different structural features at different locations within the same prosthesis differing in diameter
    • 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
    • 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
    • A61F2002/30593—Special structural features of bone or joint prostheses not otherwise provided for hollow
    • 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
    • A61F2002/30602—Shaft made of a bundle of anchoring rods or bristles, e.g. fasciculate shaft
    • 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
    • A61F2002/30878—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves with non-sharp protrusions, for instance contacting the bone for anchoring, e.g. keels, pegs, pins, posts, shanks, stems, struts
    • A61F2002/30879—Ribs
    • 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
    • A61F2002/30878—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves with non-sharp protrusions, for instance contacting the bone for anchoring, e.g. keels, pegs, pins, posts, shanks, stems, struts
    • A61F2002/30884—Fins or wings, e.g. longitudinal wings for preventing rotation within the bone cavity
    • 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
    • A61F2002/3625—Necks
    • A61F2002/3631—Necks with an integral complete or partial peripheral collar or bearing shoulder at its base
    • 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
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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
    • A61F2002/3698—Geometrical features twisted about the longitudinal axis of the shaft
    • 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
    • A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
    • A61F2002/4631—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor the prosthesis being specially adapted for being cemented
    • 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
    • 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
    • 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
    • A61F2230/0026—Angular 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
    • 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
    • A61F2230/0086—Pyramidal, tetrahedral, or wedge-shaped
    • 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
    • A61F2250/0039—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 diameter
    • 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
    • A61F2310/00389—The prosthesis being coated or covered with a particular material
    • A61F2310/00952—Coating, pre-coating or prosthesis-covering structure made of bone cement, e.g. pre-applied PMMA cement mantle

Definitions

  • the invention relates to a prosthesis part for implanting into the end of a femur adjacent to the hip joint according to the preamble of claim 1.
  • Such so-called stem prostheses essentially have the shape of a slim cone with a curved cone axis. They are glued to the corticalis of a previously prepared bone end using a cement.
  • cementless implantable prostheses including those with an anchoring cage formed by anchoring pillars, in which cancellous bone can grow after implantation (cf. DE 37 07 518 AI).
  • the conventional cemented stem prostheses can be rotated slightly in the circumferential direction due to their locally circular cross section. For some applications, it would be advantageous to have a certain form fit between the end of the bone
  • the invention provides a prosthesis part with the features specified in claim 1.
  • the prosthesis according to the invention has an essentially quadrangular cross-section in the anchoring shaft, and the recess in the bone end is prepared with a complementary quadrilateral. angular cross-section, you have a certain form fit between bone material and prosthesis part.
  • FIG. 1 a side view of a prosthesis part according to the invention
  • FIG. 2 shows a view of the prosthesis part shown in FIG. 1 from the left;
  • FIG. 3 a view of the prosthesis part shown in FIG. 1 from the right;
  • FIG. 4 a top view of the prosthesis part according to FIG. 1;
  • Figure 5 a plan view of the prosthesis part of Figure 1 from below;
  • FIG. 6 a view similar to FIG. 1 of a cement-free implantable prosthesis part that has the same outer contour.
  • 10 denotes a total of a prosthesis part which can be fastened in the upper end section of a femur 12 using cement.
  • the surgeon saws off the joint ball and the adjacent area of the femur (transversely), parts of the greater trochanter remain.
  • a recess 14 is obtained.
  • the prosthesis part 10 has a support plate 16 which closes the upper end of the femur 12 again after the prosthesis part 10 has been cemented in place.
  • a mounting pin 18 for a joint ball 20 is cast onto the support plate 16, which is only indicated by dashed lines.
  • An anchoring shaft 22 is cast onto the underside of the support plate 16. Roughly speaking, this has the shape of a curved and partially twisted pyramid with a substantially trapezoidal cross section in one section, a substantially rectangular cross section in another section and finally a circle-like cross section near the end.
  • Various axially spaced cross-sectional areas 24 are shown in the figures. As can be seen from the drawing, the cross-sectional areas 24 have rounded corners, the radius of the corners increasing towards the free end of the anchoring shaft 22, so that the lower end of the anchoring shaft has a substantially circular cross section.
  • the support plate 16 has a plate section 26 which rises at an angle of approximately 60, and this is connected to the side surface of the anchoring shaft 22 on the left in FIG. 1 by a material web 28, the edge contour of which follows the course of the trochanter minor is adjusted.
  • a bore 30 runs up to the support plate 16 and opens into this out. Liquid located in the recess 14 can escape through this bore when the prosthesis part 10 is pushed into the recess 14.
  • the side surface 36 of the anchoring shaft 22 on the right in FIG. 3 has a gentler concave indentation 38 which extends essentially over two thirds of the side surface 36. This takes good account of the standard geometry of the femur.
  • edges of the anchoring shaft 22 are broken by rounded bevels 40, the edges of the material web 28 by rounded bevels 42.
  • the implantation of the prosthesis part 10 described above is carried out in such a way that the femur 12 is prepared as described above, then the anchoring shaft 22 is coated with cement and the anchoring shaft 22 is then inserted into the recess 14 of the femur 12.
  • the prosthesis part 10 shown in FIGS. 1-5 has the same clear outer contour as a prosthesis part 44 shown in FIG. 6.
  • those parts which correspond to parts already described are again provided with the same reference numerals. These parts need not be described again in detail below.
  • the anchoring shaft 22 is now in the upper section formed as a cage structure 46.
  • the edges of the lower section of the anchoring shaft 22 continue into anchoring pillars 48, 50, 52, 54, the upper ends of which are cast onto the support plate 16.
  • the edges of the material web 28 are simulated by further anchoring pillars 56, 58.
  • further anchoring pillars are arranged transversely in the transverse direction, by means of which the various anchoring pillars are stiffened and the interior of the cage structure 46 is subdivided into subspaces of approximately the same size.
  • Three of these additional anchoring pillars are provided with the reference symbols 60, 62, 64.
  • the anchoring pillars 48-64 each have a core 66 which carries axially spaced anchoring collars 68.
  • the main anchoring posts 48-58 have approximately the following dimensions: core diameter approximately 2.0
  • the additional anchoring pillars 60, 62, 64 arranged in the interior of the space outlined by the main anchoring pillars can be somewhat smaller.
  • Typical dimensions for these secondary anchoring pillars are: core diameter about 1.5 - 3 mm, diameter of the anchoring collars about 0.6 - 1.2 mm larger than the core diameter, axial dimension of the anchoring collars about 0.5 - 1 mm, distance of Anchoring collars about 2 - 4 mm.
  • the prosthesis part shown in FIG. 6 is coated with cement during implantation in the lower, massive section of the anchoring shaft 22, in the upper cage Structure 46 of the anchor shaft 22 filled with ground cancellous material.
  • the latter grows in the healing process both against the cage structure 46 and against the recess 14, so that the prosthesis then both over an adhesive layer and over regrown
  • Cancellous material is securely attached to the bone end.
  • the lower section of the anchoring shaft 22, which is still massive in FIG. 6, can simply be designed as a continuation of the cage structure 46.
  • FIGS. 1 and 5 or FIG. 6 have the same outer contour, the surgeon can still decide after preparation of the end of the femur whether he wants a prosthesis that is to be implanted completely without cement, a partly cemented, partly waxing-in prosthesis 6 or a fully cemented prosthesis according to FIGS. 1-5.

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  • 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 present invention relates to a prosthetic member (10) which is intended for implantation in the upper end of the thighbone (12) and comprises an anchoring section having a geometrical shape corresponding to that of curved square-section pyramid.

Description

Prothesenteil Prosthesis part
Die Erfindung betrifft ein Prothesenteil zum Implantieren in das dem Hüftgelenk benachbarte Ende eines Oberschenkelknochens gemäß dem Oberbegriff des Anspruches 1.The invention relates to a prosthesis part for implanting into the end of a femur adjacent to the hip joint according to the preamble of claim 1.
Derartige sogenannte Schaftprothesen haben im wesentlichen die Form eines schlanken Kegels mit gekrümmter Kegelachse. Sie werden unter Verwendung eines Zementes mit der Cortica- lis eines zuvor entsprechend präparierten Knochenendes verklebt .Such so-called stem prostheses essentially have the shape of a slim cone with a curved cone axis. They are glued to the corticalis of a previously prepared bone end using a cement.
Umgekehrt sind zementfrei implantierbare Prothesen bekannt, darunter solche mit einem durch Verankerungspfeiler gebildeten Verankerungskäfig, in welchem nach dem Implantieren Spongiosa einwachsen kann (vgl. die DE 37 07 518 AI)Conversely, cementless implantable prostheses are known, including those with an anchoring cage formed by anchoring pillars, in which cancellous bone can grow after implantation (cf. DE 37 07 518 AI).
Die herkömmlichen zementierten Schaftprothesen sind in Umfangsrichtung auf Grund ihres lokal jeweils kreisförmigen Querschnittes geringfügig verdrehbar. Für manche Anwendungsfälle wäre es vorteilhaft, wenn man einen gewissen Formschluß zwischen der im Knochenende präpariertenThe conventional cemented stem prostheses can be rotated slightly in the circumferential direction due to their locally circular cross section. For some applications, it would be advantageous to have a certain form fit between the end of the bone
Ausnehmung und der Außenfläche des Verankerungsschaftes hätte .Recess and the outer surface of the anchoring shaft.
Zur Lösung dieser Aufgabe wird durch die Erfindung ein Prothesenteil mit den im Anspruch 1 angegebenen Merkmalen geschaffen.To achieve this object, the invention provides a prosthesis part with the features specified in claim 1.
Die erfindungsgemäße Prothese hat im Verankerungsschaft im wesentlichen viereckigen Querschnitt, und präpariert man die Ausnehmung im Knochenende mit komplementär vier- eckigem Querschnitt, hat man einen gewissen Formschluß zwischen Knochenmaterial und Prothesenteil.The prosthesis according to the invention has an essentially quadrangular cross-section in the anchoring shaft, and the recess in the bone end is prepared with a complementary quadrilateral. angular cross-section, you have a certain form fit between bone material and prosthesis part.
Vorteilhafte Weiterbildungen der Erfindung sind in Unter- ansprüchen angegeben.Advantageous developments of the invention are specified in subclaims.
Nachstehend wird die Erfindung anhand eines Ausführungs- beispieles unter Bezugnahme auf die Zeichnung näher erläutert. In dieser zeigen:The invention is explained in more detail below on the basis of an exemplary embodiment with reference to the drawing. In this show:
Figur 1: eine seitliche Ansicht eines erfindungsgemäßen Prothesenteiles ;FIG. 1: a side view of a prosthesis part according to the invention;
Figur 2 : eine Ansicht des in Figur 1 gezeigten Prothe- senteiles von links;FIG. 2 shows a view of the prosthesis part shown in FIG. 1 from the left;
Figur 3: eine Ansicht des in Figur 1 gezeigten Prothesenteils von rechts;FIG. 3: a view of the prosthesis part shown in FIG. 1 from the right;
Figur 4: eine Aufsicht auf das Prothesenteil nach Figur 1;FIG. 4: a top view of the prosthesis part according to FIG. 1;
Figur 5: eine Aufsicht auf das Prothesenteil nach Figur 1 von unten; undFigure 5: a plan view of the prosthesis part of Figure 1 from below; and
Figur 6: eine zu Figur 1 ähnliche Ansicht eines gleiche Außenkontur aufweisenden zementfrei implantierbaren Prothesenteiles.FIG. 6: a view similar to FIG. 1 of a cement-free implantable prosthesis part that has the same outer contour.
In Figur 1 ist mit 10 insgesamt ein Prothesenteil bezeichnet, welches unter Verwendung von Zement in dem oberen Endabschnitt eines Oberschenkelknochens 12 befestigbar ist. Zur entsprechenden Präparation des Knochenendes sägt der Operateur die Gelenkkugel und den benachbarten Bereich des Oberschenkelknochens (Femur) transversal ab, wobei Teile des Trochanter minor stehen bleiben. Durch Ausräumen der Spongiosa aus dem Oberschenkelknochen 12 erhält man eine Ausnehmung 14.In FIG. 1, 10 denotes a total of a prosthesis part which can be fastened in the upper end section of a femur 12 using cement. To prepare the end of the bone, the surgeon saws off the joint ball and the adjacent area of the femur (transversely), parts of the greater trochanter remain. By removing the cancellous bone from the femur 12, a recess 14 is obtained.
Das Prothesenteil 10 hat eine Tragplatte 16, welche nach dem Einzementieren des Prothesenteiles 10 das obere Ende des Oberschenkelknochens 12 wieder verschließt. An die Tragplatte 16 ist ein Befestigungszapfen 18 für eine Gelenkkugel 20 angegossen, welche nur gestrichelt angedeutet ist.The prosthesis part 10 has a support plate 16 which closes the upper end of the femur 12 again after the prosthesis part 10 has been cemented in place. A mounting pin 18 for a joint ball 20 is cast onto the support plate 16, which is only indicated by dashed lines.
An die Unterseite der Tragplatte 16 ist ein Verankerungsschaft 22 angegossen. Dieser hat grob gesprochen die Form einer gekrümmten und teilweise tordierten Pyramide mit in einem Abschnitt im wesentlichen trapezförmigen, in einem anderen Abschnitt im wesentlichen rechteckigen und schließlich in der Nähe des Endes kreisähnlichem Querschnitt . In den Figuren sind verschiedene axial beabstandete Querschnittsflächen 24 eingezeichnet. Wie aus der Zeichnung ersichtlich haben die Querschnittsflächen 24 abgerundete Ecken, wobei der Radius der Ecken zum freien Ende des Verankerungsschaftes 22 hin größer wird, so daß das untere Ende des Verankerungsschaftes im wesentlichen kreisförmigen Querschnitt hat .An anchoring shaft 22 is cast onto the underside of the support plate 16. Roughly speaking, this has the shape of a curved and partially twisted pyramid with a substantially trapezoidal cross section in one section, a substantially rectangular cross section in another section and finally a circle-like cross section near the end. Various axially spaced cross-sectional areas 24 are shown in the figures. As can be seen from the drawing, the cross-sectional areas 24 have rounded corners, the radius of the corners increasing towards the free end of the anchoring shaft 22, so that the lower end of the anchoring shaft has a substantially circular cross section.
Wie aus der Zeichnung ersichtlich, hat die Tragplatte 16 einen unter einem Winkel von etwa 60 schräg ansteigenden Plattenabschnitt 26, und dieser ist mit der in Figur 1 links gelegenen Seitenfläche des Verankerungs- schaftes 22 durch einen Materialsteg 28 verbunden, dessen Randkontur dem Verlauf des Trochanter minor angepaßt ist.As can be seen from the drawing, the support plate 16 has a plate section 26 which rises at an angle of approximately 60, and this is connected to the side surface of the anchoring shaft 22 on the left in FIG. 1 by a material web 28, the edge contour of which follows the course of the trochanter minor is adjusted.
Vom unteren Ende des Verankerungsschaftes 22 läuft eine Bohrung 30 nach oben zur Tragplatte 16 und mündet in diese aus . Durch diese Bohrung kann in der Ausnehmung 14 befindliche Flüssigkeit entweichen, wenn das Prothesenteil 10 in die Ausnehmung 14 hineingeschoben wird.From the lower end of the anchoring shaft 22, a bore 30 runs up to the support plate 16 and opens into this out. Liquid located in the recess 14 can escape through this bore when the prosthesis part 10 is pushed into the recess 14.
Wie insbesondere aus Figur 3 ersichtlich, hat die dort links gelegene Seitenfläche 32 des gekrümmt pyramidenförmigen Verankerungsschaftes 22 eine konkave Einziehung 34, die im wesentlichen auf das obere Drittel des Verankerungsschaftes 22 begrenzt ist. Ähnlich hat die in Figur 3 rechts gelegene Seitenfläche 36 des Verankerungsschaftes 22 eine sanftere konkave Einziehung 38, welche sich im wesentlichen über zwei Drittel der Seitenfläche 36 erstreckt. Hierdurch wird der Standard-Geometrie des Oberschenkelknochens gut Rechnung getragen.As can be seen in particular from FIG. 3, the side surface 32 of the curved pyramid-shaped anchoring shaft 22 on the left there has a concave indentation 34, which is essentially limited to the upper third of the anchoring shaft 22. Similarly, the side surface 36 of the anchoring shaft 22 on the right in FIG. 3 has a gentler concave indentation 38 which extends essentially over two thirds of the side surface 36. This takes good account of the standard geometry of the femur.
Die Kanten des Verankerungsschaftes 22 sind durch abgerundete Fasen 40, die Kanten des Materialsteges 28 durch abgerundete Fasen 42 gebrochen.The edges of the anchoring shaft 22 are broken by rounded bevels 40, the edges of the material web 28 by rounded bevels 42.
Das Implantieren des oben beschriebenen Prothesenteiles 10 erfolgt so, daß der Oberschenkelknochen 12 wie oben beschrieben präpariert wird, dann der Verankerungsschaft 22 mit Zement bestrichen wird und der Verankerungsschaft 22 anschließend in die Ausnehmung 14 des Oberschenkel- knochens 12 eingesetzt wird.The implantation of the prosthesis part 10 described above is carried out in such a way that the femur 12 is prepared as described above, then the anchoring shaft 22 is coated with cement and the anchoring shaft 22 is then inserted into the recess 14 of the femur 12.
Das in den Figuren 1-5 dargestellte Prothesenteil 10 hat dieselbe lichte Außenkontur wie ein Figur 6 dargestelltes Prothesenteil 44. Bei diesem sind solche Teile, welche oben schon beschriebenen Teilen entsprechen, wieder mit denselben Bezugszeichen versehen. Diese Teile brauchen nachstehend nicht nochmals im einzelnen beschrieben zu werden.The prosthesis part 10 shown in FIGS. 1-5 has the same clear outer contour as a prosthesis part 44 shown in FIG. 6. In this part, those parts which correspond to parts already described are again provided with the same reference numerals. These parts need not be described again in detail below.
Im oberen Abschnitt ist der Verankerungsschaft 22 nun als Käfigstruktur 46 ausgebildet. Die Kanten des unteren Abschnittes des Verankerungsschaftes 22 setzen sich in Verankerungspfeiler 48, 50, 52, 54 fort, deren obere Enden an die Tragplatte 16 angegossen sind. Die Kanten des Materialsteges 28 werden durch weitere Verankerungspfeiler 56, 58 nachgebildet. Im Inneren des durch die vorgenannten Verankerungspfeiler umrissenen Raumes sind weitere Verankerungspfeiler transversaler Richtung schräg verlaufend angeordnet, durch welche die verschiedenen Verankerungspfeiler versteift werden und das Innere der Käfigstruktur 46 in etwa gleich große Unterräume unterteilt wird. Drei dieser zusätzlichen Verankerungspfeiler sind mit dem Bezugszeichen 60, 62, 64 versehen.The anchoring shaft 22 is now in the upper section formed as a cage structure 46. The edges of the lower section of the anchoring shaft 22 continue into anchoring pillars 48, 50, 52, 54, the upper ends of which are cast onto the support plate 16. The edges of the material web 28 are simulated by further anchoring pillars 56, 58. In the interior of the space outlined by the aforementioned anchoring pillars, further anchoring pillars are arranged transversely in the transverse direction, by means of which the various anchoring pillars are stiffened and the interior of the cage structure 46 is subdivided into subspaces of approximately the same size. Three of these additional anchoring pillars are provided with the reference symbols 60, 62, 64.
Die Verankerungspfeiler 48 - 64 haben jeweils einen Kern 66 , welcher axial beabstandete Verankerungsbunde 68 trägt. Die Haupt-Verankerungspfeiler 48 - 58 haben etwa folgende Abmessungen: Kerndurchmesser etwa 2,0The anchoring pillars 48-64 each have a core 66 which carries axially spaced anchoring collars 68. The main anchoring posts 48-58 have approximately the following dimensions: core diameter approximately 2.0
- 4,5 mm, Durchmesser der Verankerungsbunde 68 etwa 0,8 - 1,5 mm größer als der Kerndurchmesser, axiale- 4.5 mm, diameter of the anchoring collars 68 about 0.8 - 1.5 mm larger than the core diameter, axial
Erstreckung der Verankerungsbunde 68 etwa 0,6 - 1,2 mm, Abstand der Verankerungsbunde 68 voneinander etwa 3Extension of the anchoring collars 68 about 0.6-1.2 mm, distance of the anchoring collars 68 from each other about 3
- 6 mm. Die im Inneren des durch die Haupt-Verankerungs- pfeiler umrissenen Raumes angeordneten zusätzlichen Verankerungspfeiler 60, 62, 64 können etwas kleiner sein. Typische Maße für diese sekundären Verankerungspfeiler sind: Kerndurchmesser etwa 1,5 - 3 mm, Durchmesser der Verankerungsbunde etwa 0,6 - 1,2 mm größer als der Kerndurchmesser, axiale Abmessung der Veran- kerungsbunde etwa 0,5 - 1 mm, Abstand der Verankerungsbunde etwa 2 - 4 mm.- 6 mm. The additional anchoring pillars 60, 62, 64 arranged in the interior of the space outlined by the main anchoring pillars can be somewhat smaller. Typical dimensions for these secondary anchoring pillars are: core diameter about 1.5 - 3 mm, diameter of the anchoring collars about 0.6 - 1.2 mm larger than the core diameter, axial dimension of the anchoring collars about 0.5 - 1 mm, distance of Anchoring collars about 2 - 4 mm.
Das in Figur 6 gezeigte Prothesenteil wird beim Implantieren im unteren, massiven Abschnitt des Verankerungs- Schaftes 22 mit Zement bestrichen, in der oberen Käfig- Struktur 46 des Verankerungsschaftes 22 mit gemahlenem Spongiosamaterial gefüllt. Letzteres wächst im Heilungs- prozess sowohl gegen die Käfigstruktur 46 als auch gegen die Ausnehmung 14 , so daß die Prothese dann sowohl über eine KlebstoffSchicht als auch über nachgewachsenesThe prosthesis part shown in FIG. 6 is coated with cement during implantation in the lower, massive section of the anchoring shaft 22, in the upper cage Structure 46 of the anchor shaft 22 filled with ground cancellous material. The latter grows in the healing process both against the cage structure 46 and against the recess 14, so that the prosthesis then both over an adhesive layer and over regrown
Spongiosamaterial mit dem Knochenende sicher verbunden ist .Cancellous material is securely attached to the bone end.
Bei einem weiter abgewandelten Ausführungsbeispiel für ein Prothesenteil 10 kann man den in Figur 6 noch massiven unteren Abschnitt des Verankerungsschaftes 22 einfach als Fortsetzung der Käfigstruktur 46 ausbilden.In a further modified exemplary embodiment for a prosthesis part 10, the lower section of the anchoring shaft 22, which is still massive in FIG. 6, can simply be designed as a continuation of the cage structure 46.
Da die in den Figuren 1 und 5 bzw. Figur 6 gezeigten beiden Prothesenteile gleiche Außenkontur haben, kann sich der Operateur noch nach Präparation des Endes des Oberschenkelknochens entscheiden, ob er eine vollständig zementfrei zu implantierende Prothese, eine zum Teil einzementierte, zum Teil einwachsende Prothese gemäß Figur 6 oder eine vollständig einzementierte Prothese gemäß den Figuren 1-5 verwenden will. Since the two prosthesis parts shown in FIGS. 1 and 5 or FIG. 6 have the same outer contour, the surgeon can still decide after preparation of the end of the femur whether he wants a prosthesis that is to be implanted completely without cement, a partly cemented, partly waxing-in prosthesis 6 or a fully cemented prosthesis according to FIGS. 1-5.

Claims

Ansprüche Expectations
1. Prothesenteil zum Implantieren in das dem Hüftgelenk benachbarte Ende eines Oberschenkelknochens, mit einer Tragplatte (16), welche nach Implantierung des Prothesenteiles (10) das Ende des Oberschenkelkno- chens (12) überdeckt und ein Befestigungsteil (18) für eine Gelenkkugel (20) trägt, und mit einem mit der Tragplatte (16) verbundenen, vorzugsweise mit dieser einstückigen Verankerungsschaft (22) mit gekrümmter Schaft- achse, dadurch gekennzeichnet, daß der Verankerungsschaft (22) im wesentlichen viereckigen, zum freien Schaftende hin abnehmenden transversalen Querschnitt aufweist .1. A prosthesis part for implantation into the end of a femur adjacent to the hip joint, with a support plate (16) which, after implantation of the prosthesis part (10), covers the end of the femur (12) and a fastening part (18) for a joint ball (20 ) carries, and with a with the support plate (16), preferably with this one-piece anchoring shaft (22) with a curved shaft axis, characterized in that the anchoring shaft (22) has a substantially square, decreasing towards the free shaft end transverse cross-section.
2. Prothesenteil nach Anspruch 1, dadurch gekennzeichnet, daß die in unterschiedlicher longitudinaler Stellung genommenen Schaftquerschnitte im wesentlichen trapezförmig oder rechteckförmig sind.2. Prosthesis part according to claim 1, characterized in that the shaft cross sections taken in different longitudinal positions are substantially trapezoidal or rectangular.
3. Prothesenteil nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Ecken der transversalen Quer- schnittsflächen abgerundet sind.3. Prosthesis part according to claim 1 or 2, characterized in that the corners of the transverse cross-sectional surfaces are rounded.
4. Prothesenteil nach Anspruch 3 , dadurch gekennzeichnet , daß der Radius der Ecken zum freien Ende des4. prosthesis part according to claim 3, characterized in that the radius of the corners to the free end of
Verankerungsschaftes (22) hin zunimmt.Anchorage shaft (22) increases.
5. Prothesenteil nach einem der Ansprüche 1-4, dadurch gekennzeichnet, daß mindestens eine der zu einer5. prosthesis part according to any one of claims 1-4, characterized in that at least one of the one
Längsachse der Tragplatte (16) im wesentlichen parallelen Seitenflächen (32, 36) des Verankerungsschaftes (22) eine konkave Einziehung (34, 38) aufweist. The longitudinal axis of the support plate (16) has essentially parallel side surfaces (32, 36) of the anchoring shaft (22) with a concave indentation (34, 38).
6. Prothesenteil nach Anspruch 5, dadurch gekennzeichnet, daß beide der im wesentlichen zur Längsachse der Tragplatte (16) parallelen Seitenflächen (32, 36) des Verankerungsschaftes (22) eine konkave Einziehung6. prosthesis part according to claim 5, characterized in that both of the substantially parallel to the longitudinal axis of the support plate (16) side surfaces (32, 36) of the anchoring shaft (22) a concave recess
(34, 38) aufweisen, wobei die Einziehung (34) der einen Seitenfläche (32) im wesentlichen in deren oberem Drittel liegt, während die Einziehung (38) der anderen Seitenfläche (36) sich etwa über zwei Drittel der Längserstreckung dieser Seitenfläche erstreckt.(34, 38), the indentation (34) of one side surface (32) lying essentially in the upper third, while the indentation (38) of the other side surface (36) extends over approximately two thirds of the longitudinal extent of this side surface.
7. Prothesenteil nach einem der Ansprüche 1-6, gekennzeichnet durch einen die Tragplatte (16) mit dem7. prosthesis part according to one of claims 1-6, characterized by a the support plate (16) with the
Verankerungsschaft (22) verbindenden Materialsteg (28), dessen Randkontur konvex ist .Anchoring shaft (22) connecting material web (28), the edge contour of which is convex.
8. Prothesenteil nach einem der Ansprüche 1-7, gekennzeichnet durch einen Kanal (30) , der sich vom unteren8. prosthesis part according to one of claims 1-7, characterized by a channel (30) which extends from the lower
Ende des Verankerungsschaftes (22) durch den Verankerungs- schaft hindurch erstreckt und in der Oberseite der Tragplatte (16) ausmündet.End of the anchoring shaft (22) extends through the anchoring shaft and opens into the top of the support plate (16).
9. Prothesenteil nach einem der Ansprüche 1-8, dadurch gekennzeichnet, daß die Außenfläche des Verankerungs- Schaftes (22) der lichten Außenkontur eines zementfrei implantierbaren Prothesenteiles (44) entspricht, welches eine Tragplatte (16) und einen mit dieser verbundenen Verankerungskäfig (46) aufweist, der in longitudinaler Richtung verlaufende Verankerungspfeiler (48-54) aufweist, welche die Längskanten des Verankerungsschaftes (22) nachbilden, und vorzugsweise sekundäre Verankerungspfeiler (60, 62, 64) aufweist, die sich durch den durch die Verankerungspfeiler (48-54) begrenzten Raum erstrek- ken. 9. A prosthesis part according to any one of claims 1-8, characterized in that the outer surface of the anchoring shaft (22) corresponds to the clear outer contour of a cementless implantable prosthetic part (44) which has a support plate (16) and an anchoring cage (46) connected thereto ) which has longitudinally extending anchoring pillars (48-54) which simulate the longitudinal edges of the anchoring shaft (22), and preferably has secondary anchoring pillars (60, 62, 64) which are defined by the anchoring pillars (48-54 ) extend limited space.
10. Satz von Prothesenteilen bestehend aus mindestens einem Prothethesenteil (10) gemäß einem der Ansprüche 1 bis 8 und mindestens einem Prothesenteil (44) gleicher Außenkontur gemäß Anspruch 9. 10. Set of prosthesis parts consisting of at least one prosthetic part (10) according to one of claims 1 to 8 and at least one prosthetic part (44) of the same outer contour according to claim 9.
PCT/EP1997/004825 1996-03-19 1997-09-05 Prosthetic member WO1999012499A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE19610729A DE19610729A1 (en) 1996-03-19 1996-03-19 Medullary nail for hip prosthesis
PCT/EP1997/004825 WO1999012499A1 (en) 1996-03-19 1997-09-05 Prosthetic member
EP97919038A EP1028674A1 (en) 1997-09-05 1997-09-05 Prosthetic member

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19610729A DE19610729A1 (en) 1996-03-19 1996-03-19 Medullary nail for hip prosthesis
PCT/EP1997/004825 WO1999012499A1 (en) 1996-03-19 1997-09-05 Prosthetic member

Publications (1)

Publication Number Publication Date
WO1999012499A1 true WO1999012499A1 (en) 1999-03-18

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PCT/EP1997/004825 WO1999012499A1 (en) 1996-03-19 1997-09-05 Prosthetic member

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DE (1) DE19610729A1 (en)
WO (1) WO1999012499A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19740689A1 (en) * 1997-09-16 1999-03-18 Franz Prof Dr Med Copf Thigh prothesis
DE10037345A1 (en) * 2000-07-29 2002-02-07 Juergen Buchholz Surgical element
EP3954333B1 (en) * 2020-08-13 2023-05-03 Alessandro Melozzi Hip prosthesis with improved stem

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8213101U1 (en) * 1982-08-26 Howmedica International, Inc. Zweigniederlassung Kiel, 2300 Kiel Femoral component of a hip joint prosthesis
FR2528307A1 (en) * 1982-06-14 1983-12-16 Tornier Sa Prosthetic joint section for femur - has plate with rounded convex support face towards free end of femur
DE3707518A1 (en) * 1986-05-16 1987-11-26 Copf Franz PROSTHESE PART AND METHOD FOR THE PRODUCTION THEREOF
EP0289922A1 (en) * 1987-05-06 1988-11-09 Fried. Krupp Gesellschaft mit beschränkter Haftung Joint prosthesis and process for its manufacture
US5152799A (en) * 1991-10-04 1992-10-06 Exactech, Inc. Prosthetic femoral stem
EP0790045A1 (en) * 1996-02-08 1997-08-20 André Georges Deckner Anchoring shaft, especially for use in prostheses

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8213101U1 (en) * 1982-08-26 Howmedica International, Inc. Zweigniederlassung Kiel, 2300 Kiel Femoral component of a hip joint prosthesis
FR2528307A1 (en) * 1982-06-14 1983-12-16 Tornier Sa Prosthetic joint section for femur - has plate with rounded convex support face towards free end of femur
DE3707518A1 (en) * 1986-05-16 1987-11-26 Copf Franz PROSTHESE PART AND METHOD FOR THE PRODUCTION THEREOF
EP0289922A1 (en) * 1987-05-06 1988-11-09 Fried. Krupp Gesellschaft mit beschränkter Haftung Joint prosthesis and process for its manufacture
US5152799A (en) * 1991-10-04 1992-10-06 Exactech, Inc. Prosthetic femoral stem
EP0790045A1 (en) * 1996-02-08 1997-08-20 André Georges Deckner Anchoring shaft, especially for use in prostheses

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