DE19962324A1 - Stiffening for a human knee joint prosthesis has anchor screws for the connecting linkages at the femur and tibia shafts with an angled anchor screw between the linkages - Google Patents

Stiffening for a human knee joint prosthesis has anchor screws for the connecting linkages at the femur and tibia shafts with an angled anchor screw between the linkages

Info

Publication number
DE19962324A1
DE19962324A1 DE19962324A DE19962324A DE19962324A1 DE 19962324 A1 DE19962324 A1 DE 19962324A1 DE 19962324 A DE19962324 A DE 19962324A DE 19962324 A DE19962324 A DE 19962324A DE 19962324 A1 DE19962324 A1 DE 19962324A1
Authority
DE
Germany
Prior art keywords
tibia
screw
linkages
femur
shaft
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
DE19962324A
Other languages
German (de)
Other versions
DE19962324B4 (en
Inventor
Peter Brehm
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
PETER BREHM HOLDING GMBH & CO. KG, DE
Original Assignee
Peter Brehm
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Filing date
Publication date
Application filed by Peter Brehm filed Critical Peter Brehm
Priority to DE19962324A priority Critical patent/DE19962324B4/en
Publication of DE19962324A1 publication Critical patent/DE19962324A1/en
Application granted granted Critical
Publication of DE19962324B4 publication Critical patent/DE19962324B4/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • A61F2/38—Joints for elbows or knees
    • A61F2/3836—Special connection between upper and lower leg, e.g. constrained
    • 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
    • A61F2/38—Joints for elbows or knees
    • A61F2/3859—Femoral components
    • 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
    • A61F2/38—Joints for elbows or knees
    • A61F2/389—Tibial components
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30331—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit
    • A61F2002/30332—Conically- or frustoconically-shaped protrusion and recess
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30383—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by laterally inserting a protrusion, e.g. a rib into a complementarily-shaped groove
    • A61F2002/3039—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by laterally inserting a protrusion, e.g. a rib into a complementarily-shaped groove with possibility of relative movement of the rib within the groove
    • A61F2002/30392—Rotation
    • A61F2002/30395—Rotation with additional means for preventing or locking said rotation
    • 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
    • A61F2002/30433—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements using additional screws, bolts, dowels, rivets or washers e.g. connecting screws
    • 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
    • A61F2002/30604—Special structural features of bone or joint prostheses not otherwise provided for modular
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • 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
    • A61F2002/30774—Apertures or holes, 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
    • A61F2002/30772—Apertures or holes, e.g. of circular cross section
    • A61F2002/30784—Plurality of holes
    • A61F2002/30785—Plurality of holes parallel
    • 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
    • A61F2002/30787—Plurality of holes inclined obliquely 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
    • A61F2002/30772—Apertures or holes, e.g. of circular cross section
    • A61F2002/3079—Stepped or enlarged apertures, e.g. having discrete diameter changes
    • 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
    • A61F2002/30878—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
    • 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
    • A61F2220/00—Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2220/0025—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2220/0033—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementary-shaped recess, e.g. held by friction fit
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2220/00—Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2220/0025—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2220/0041—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements using additional screws, bolts, dowels or rivets, e.g. connecting screws

Abstract

The stiffening assembly for a human knee joint prosthesis has a tibia shaft (13) and a femur shaft (14), with a connecting linkage (2) at the tibia side and a connecting linkage (1) at the femur side. An anchor screw (11) locks the tibia linkage (2) to the tibia shaft (13) and an anchor screw (12) locks the femur linkage (1) to the femur shaft (14). An angled screw (34) holds the connecting linkages (1,2) together. The connecting linkages (1,2) are held together in a positive and a press fit, to lie together at their flat sections (3,4) and in a positive fit at their curved sections (5,6).

Description

Die Erfindung richtet sich auf eine Versteifungsanordnung für ein mensch­ liches Kniegelenk.The invention is directed to a stiffening arrangement for a human knee joint.

Eine derartige Versteifungsanordnung ist indiziert, wenn im Bereich des Kniegelenks das Einsetzen einer Kniegelenkprothese nicht oder nicht mehr möglich ist, weil Muskeln und Bänder nicht mehr vorhanden sind, eine Prothese nicht mehr haltbar zu befestigen ist oder z. B. aufgrund einer Mi­ nenexplosion große Teile des Kniebereichs ganz fehlen.Such a stiffening arrangement is indicated if in the area of Knee joint the insertion of a knee joint prosthesis or no longer is possible because muscles and ligaments are no longer present, one Prosthesis is no longer durable or z. B. due to a Mi Large parts of the knee area are completely missing.

Der Erfindung liegt die Aufgabe zugrunde, eine solche Versteifungsanord­ nung so auszugestalten, daß sie einfach implantierbar ist und im implan­ tierten Zustand fest sitzt sowie eine zuverlässige, belastbare Verbindung herstellt.The invention has for its object such a stiffening arrangement design in such a way that it is easy to implant and implan tied condition and a reliable, resilient connection manufactures.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Verstei­ fungsanordnung einen Tibiaschaft, einen Femurschaft, ein tibiaseitiges Verbindungsteil, ein femurseitiges Verbindungsteil, eine Verschraubung zwischen tibiaseitigem Verbindungsteil und Tibiaschaft, eine Verschrau­ bung zwischen femurseitigem Verbindungsteil und Femurschaft sowie eine schräg verlaufende, die Verbindungsteile verbindende Verschraubung um­ faßt.This object is achieved in that the reinforcement a tibial shaft, a femoral shaft, a tibial side Connecting part, a connecting part on the femur side, a screw connection between the connecting part on the tibia side and the tibia shaft, a screw connection Exercise between the femoral connection part and femoral shaft and a oblique screw connection connecting the connecting parts sums up.

Durch diese Ausgestaltung wird eine hohe Belastbarkeit und eine zuverläs­ sige Verbindung erreicht. This configuration ensures high resilience and reliability connection reached.  

In weiterer Ausgestaltung der Erfindung ist vorgesehen, daß die Verbin­ dungsteile form- und preßschlüssig miteinander verbunden sind, und zwar insbesondere einerseits abschnittsweise über plane Stirnflächen und ande­ rerseits über formschlüssig aneinander anliegende Kurvenabschnitte.In a further embodiment of the invention it is provided that the verb manure parts are positively and press-fitly connected to each other in particular on the one hand in sections over flat end faces and others on the other hand, by way of form-fitting curve sections.

Diese sind günstigerweise so ausgebildet, daß der eine Kurvenabschnitt konkav geformt ist und Begrenzungslinien aufweist, die kreisabschnittför­ mig, konzentrisch zu einem Mittelpunkt verlaufen, und daß der zweite Kurvenabschnitt kreisabschnittförmige, konzentrisch zu dem Schwenkmit­ telpunkt verlaufende Begrenzungslinien aufweist.These are advantageously designed so that the one curve section is concave in shape and has boundary lines which form a circular section mig, concentric to a center point, and that the second Curve section circular, concentric to the pivot with has point boundary lines.

Nachfolgend wird die Erfindung anhand bevorzugter Ausführungsbeispiele in Verbindung mit der Zeichnung näher beschrieben. Dabei zeigen:The invention is described below on the basis of preferred exemplary embodiments described in more detail in connection with the drawing. Show:

Fig. 1 eine teilweise aufgebrochene Seitenansicht einer erfindungsgemäßen Versteifungsanordnung, Fig. 1 is a partially broken side view of a strengthening assembly according to the invention,

Fig. 2 eine Aufsicht, Fig. 2 is a plan,

Fig. 3 bis 6 die beiden Teile der Versteifungsanordnung in unterschiedli­ chen Winkelstellungen zueinander und Fig. 3 to 6, the two parts of the stiffening arrangement in various angular Chen positions to each other and

Fig. 7 bis 9 vergrößert herausgezeichnet das Ineinandergreifen der Verbin­ dungsteile in verschiedenen Winkelpositionen. Fig. 7 to 9 enlarged drawn out the mesh of the connec tion parts in different angular positions.

Eine in der Zeichnung dargestellte Versteifungsanordnung umfaßt zwei Verbindungsteile 1, 2, welche in gestrecktem, verbundenen Zustand einer­ seits über ebene Stirnflächen 3, 4 und andererseits über Kurvenabschnitte 5, 6 form- und preßschlüssig aneinander anliegen.A stiffening arrangement shown in the drawing comprises two connecting parts 1 , 2 which, in the stretched, connected state, rest on one another via flat end faces 3 , 4 and on the other hand via curve sections 5 , 6 in a form-fitting and press-fit manner.

Jedes Verbindungsteil 1, 2 weist eine Bohrung 7, 8 mit einem verbreiterten Abschnitt 9, 10 zur versenkten Aufnahme eines Schraubenkopfes bzw. zum Durchführen einer Schraube 11, 12 auf.Each connecting part 1 , 2 has a bore 7 , 8 with a widened section 9 , 10 for the recessed reception of a screw head or for the passage of a screw 11 , 12 .

Die Gewindeschrauben 11, 12 werden verwendet, um die Verbindungsteile 1, 2 an Schäften 13, 14 anzuschrauben, welche in Femur bzw. Tibia einge­ trieben werden. Die Schäfte 13, 14 weisen konische, sich verjüngende An­ sätze 15, 16 auf, die in korrespondierende Ausnehmungen 17, 18 in den Verbindungsteilen 1 bzw. 2 eingreifen, wobei in den Ansätzen 15, 16 Ge­ windebohrungen 19, 20 ausgebildet sind, in die die Schrauben 11, 12 ein­ gedreht werden.The threaded screws 11 , 12 are used to screw the connecting parts 1 , 2 to shafts 13 , 14 , which are driven into the femur or tibia. The shafts 13 , 14 have conical, tapering sets 15 , 16 which engage in corresponding recesses 17 , 18 in the connecting parts 1 and 2 , wherein in the approaches 15 , 16 Ge threaded holes 19 , 20 are formed, in the the screws 11 , 12 are turned.

Operativ werden also zunächst die Schäfte 13, 14 in Tibia bzw. Femur ein­ getrieben, und wenn die Schäfte 13, 14 positioniert sind, wird an sie je ein Verbindungsteil 1 bzw. 2 angeschraubt. In dieser Phase sind die Verbin­ dungsteile 1, 2 noch entfernt voneinander und können relativ zueinander abgewinkelt sein.Operatively, the shafts 13 , 14 are first driven into the tibia or femur, and when the shafts 13 , 14 are positioned, a connecting part 1 or 2 is screwed onto them. In this phase, the connec tion parts 1 , 2 are still distant from each other and can be angled relative to each other.

Die nachfolgend beschriebenen Kurvenabschnitte der Verbindungsteile 1, 2 sind besonders gut in Fig. 7 und 9 erkennbar.The curve sections of the connecting parts 1 , 2 described below can be seen particularly well in FIGS. 7 and 9.

Der Kurvenabschnitt 5 ist konkav ausgebildet, wobei seine Begrenzungsli­ nien 21, 22 kreisabschnittförmig, konzentrisch zu einem Mittelpunkt 23 verlaufen und über einen abschließenden Bogenabschnitt 24 miteinander verbunden sind. The curve section 5 is concave, its limitation lines 21 , 22 extending in the form of a circular section, concentric with a center point 23 and being connected to one another via a final curved section 24 .

Die Begrenzungslinien 25, 26 des konvexen Kurvenabschnitts 6 sind eben­ falls konzentrisch zu dem Mittelpunkt 23 verlaufende Kreisbogenabschnit­ te, welche über einen zum Bogenabschnitt 24 korrespondierenden Bogen­ abschnitt 27 verbunden sind.The boundary lines 25, 26 of the convex curve portion 6 are flat, if th concentric to the center point 23 extending Kreisbogenabschnit which portion a corresponding to the arc portion 24 are connected to arc 27th

Aufgrund dieser Konfiguration ist es möglich, wie im Zusammenhang mit Fig. 4 bis 6 einerseits und Fig. 7 bis 9 andererseits veranschaulicht, die Verbindungsteile 1, 2 über eine Schwenkbewegung um den Schwenkmit­ telpunkt 23 miteinander formschlüssig in Eingriff zu bringen, wobei der Formschluß bei einem Winkel von 35° beginnt. In Fig. 1 ist die Position dargestellt, wo die Schäfte 13, 14 von Tibia und Femur parallel zueinander ausgerichtet und die Verbindungsteile 1, 2 form- und preßschlüssig mitein­ ander verbunden sind.Due to this configuration, it is possible, as illustrated in connection with FIGS. 4 to 6 on the one hand and FIGS. 7 to 9 on the other hand, to bring the connecting parts 1 , 2 into positive engagement with one another by means of a pivoting movement around the pivoting center point 23 , the positive locking being begins at an angle of 35 °. In Fig. 1 the position is shown where the shafts 13 , 14 of the tibia and femur aligned parallel to each other and the connecting parts 1 , 2 are positively and press-fitly connected to each other.

Zur Herstellung einer endgültigen, belastbaren und zuverlässigen Fixierung in dieser Position sind in den Verbindungsteilen 1, 2 miteinander fluchten­ de Bohrungen 28, 29 eingebracht.To produce a final, resilient and reliable fixation in this position, aligned bores 28 , 29 are made in the connecting parts 1 , 2 .

Die Bohrungen 29 weisen einen verbreiterten Abschnitt 30 zur Aufnahme eines Schraubenkopfes 31 auf. Die Bohrungen 28 sind mit einem Gewinde­ abschnitt 32 versehen, in welchen Gewindeabschnitte 33 von Verbindungs­ schrauben 34 eindrehbar ist. Die Verbindungsschrauben 34 verlaufen im eingedrehten Zustand in einem Winkel von etwa 45° zur Längsachse der Schäfte 13, 14.The bores 29 have a widened section 30 for receiving a screw head 31 . The bores 28 are provided with a threaded section 32 , in which threaded sections 33 of connecting screws 34 can be screwed. When screwed in, the connecting screws 34 extend at an angle of approximately 45 ° to the longitudinal axis of the shafts 13 , 14 .

Claims (5)

1. Versteifungsanordnung für den menschlichen Kniegelenkbereich, um­ fassend
  • - einen Tibiaschaft (13)
  • - einen Femurschaft (14)
  • - ein tibiaseitiges Verbindungsteil (2)
  • - ein femurseitiges Verbindungsteil (1)
  • - eine Verschraubung (Schraube 11) zwischen tibiaseitigem Verbin­ dungsteil (2) und Tibiaschaft (13)
  • - eine Verschraubung (Schraube 12) zwischen femurseitigem Verbin­ dungsteil (1) und Femurschaft (14) sowie
  • - eine schräg verlaufende, die Verbindungsteile (1, 2) verbindende Verschraubung (Schraube 34).
1. stiffening arrangement for the human knee joint area to encompass
  • - a tibia shaft ( 13 )
  • - a femoral shaft ( 14 )
  • - a connecting part on the Tibia side ( 2 )
  • - a femoral connection part ( 1 )
  • - A screw (screw 11 ) between the tibia-side connec tion part ( 2 ) and tibia shaft ( 13 )
  • - A screw (screw 12 ) between the femoral connec tion part ( 1 ) and femoral shaft ( 14 ) and
  • - An oblique screw connection (screw 34 ) connecting the connecting parts ( 1 , 2 ).
2. Versteifungsanordnung nach Anspruch 1, dadurch gekennzeichnet, daß die Verbindungsteile (1, 2) form- und preßschlüssig miteinander verbunden sind.2. stiffening arrangement according to claim 1, characterized in that the connecting parts ( 1 , 2 ) are positively and press-fitly connected to one another. 3. Versteifungsanordnung nach Anspruch 2, dadurch gekennzeichnet, daß die Verbindungsteile (1, 2) abschnittsweise über plane Stirnflächen (3, 4) aneinander anliegen.3. stiffening arrangement according to claim 2, characterized in that the connecting parts ( 1 , 2 ) abut each other in sections over flat end faces ( 3 , 4 ). 4. Versteifungsanordnung nach Anspruch 2, dadurch gekennzeichnet, daß die Verbindungsteile (1, 2) über Kurvenabschnitte (5, 6) formschlüssig ein­ ander anliegen. 4. stiffening arrangement according to claim 2, characterized in that the connecting parts ( 1 , 2 ) via curve sections ( 5 , 6 ) form-fitting one another. 5. Versteifungsanordnung nach Anspruch 4, dadurch gekennzeichnet, daß der eine Kurvenabschnitt (5) konkav ausgebildet ist und Begrenzungslinien (21, 22) aufweist, die kreisabschnittförmig, konzentrisch zu einem Mittel­ punkt (23) verlaufen, und daß der zweite Kurvenabschnitt (6) kreisab­ schnittförmige, konzentrisch zu dem Schwenkmittelpunkt (23) verlaufende Begrenzungslinien (25, 26) aufweist.5. stiffening arrangement according to claim 4, characterized in that the one curve section ( 5 ) is concave and has boundary lines ( 21 , 22 ) which are circular section-shaped, concentric to a center point ( 23 ), and that the second curve section ( 6 ) circular cut-shaped, concentric to the pivot center ( 23 ) extending boundary lines ( 25 , 26 ).
DE19962324A 1999-12-23 1999-12-23 Stiffening arrangement for a human knee joint Expired - Lifetime DE19962324B4 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2861577A1 (en) * 2003-11-05 2005-05-06 Ceravic IMPLANTABLE ORTHESIS AND SURGICAL KIT FOR ARTHRODESIS OF THE KNEE
DE102008045291A1 (en) * 2008-09-02 2010-03-04 Merete Medical Gmbh Knee arthrodesis implant
WO2012016002A1 (en) * 2010-07-30 2012-02-02 Howmedica Osteonics Corp. Stabilized knee prosthesis

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DE8306663U1 (en) * 1983-03-04 1986-07-31 Mecron Medizinische Produkte Gmbh, 1000 Berlin Implant
DE19722389A1 (en) * 1997-05-28 1998-12-10 Eska Implants Gmbh & Co Modular arthrodesic knee joint

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DE8306663U1 (en) * 1983-03-04 1986-07-31 Mecron Medizinische Produkte Gmbh, 1000 Berlin Implant
DE19722389A1 (en) * 1997-05-28 1998-12-10 Eska Implants Gmbh & Co Modular arthrodesic knee joint

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Title
ENGELBRECHT,E., u.a.: Interpositionsnagel bei diaphysären Knochendefekten und Arthrodesenagel bei gescheitertem Kniegelenksersatz. In: Chirurg 1985, 56, S.712-717 *

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2861577A1 (en) * 2003-11-05 2005-05-06 Ceravic IMPLANTABLE ORTHESIS AND SURGICAL KIT FOR ARTHRODESIS OF THE KNEE
EP1529493A1 (en) * 2003-11-05 2005-05-11 Ceravic Implantable orthese and surgical kit for the arthrodesis of knee
US7588603B2 (en) 2003-11-05 2009-09-15 Teknimed Implantable orthesis and surgical kit for knee arthrodesis
DE102008045291A1 (en) * 2008-09-02 2010-03-04 Merete Medical Gmbh Knee arthrodesis implant
DE102008045291B4 (en) * 2008-09-02 2013-05-02 Merete Medical Gmbh Knee arthrodesis implant
WO2012016002A1 (en) * 2010-07-30 2012-02-02 Howmedica Osteonics Corp. Stabilized knee prosthesis
US8545571B2 (en) 2010-07-30 2013-10-01 Howmedica Osteonics Corp. Stabilized knee prosthesis
US9452051B2 (en) 2010-07-30 2016-09-27 Howmedica Osteonics Corp. Stabilized knee prosthesis
US10376371B2 (en) 2010-07-30 2019-08-13 Howmedica Osteonics Corp. Stabilized knee prosthesis
US11229521B2 (en) 2010-07-30 2022-01-25 Howmedica Osteonics Corp. Stabilized knee prosthesis

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