DE19640745B4 - Hüftgelenk-Endoprothese mit Kopplungselement und biokompatibler Zwischenschicht - Google Patents

Hüftgelenk-Endoprothese mit Kopplungselement und biokompatibler Zwischenschicht Download PDF

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Publication number
DE19640745B4
DE19640745B4 DE19640745A DE19640745A DE19640745B4 DE 19640745 B4 DE19640745 B4 DE 19640745B4 DE 19640745 A DE19640745 A DE 19640745A DE 19640745 A DE19640745 A DE 19640745A DE 19640745 B4 DE19640745 B4 DE 19640745B4
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coupling element
hip joint
intermediate layer
joint endoprosthesis
ball head
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DE19640745A
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DE19640745A1 (de
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Hartmut Kälberer
Hans-Georg Pfaff
Gerd Dr. Willmann
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Cerasiv GmbH Innovatives Keramik Engineering
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Cerasiv GmbH Innovatives Keramik Engineering
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    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
    • A61L27/14—Macromolecular materials
    • A61L27/16—Macromolecular materials obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • 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
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    • A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
    • A61L27/02—Inorganic materials
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  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Veterinary Medicine (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Transplantation (AREA)
  • Public Health (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Epidemiology (AREA)
  • Dermatology (AREA)
  • Medicinal Chemistry (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Cardiology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Prostheses (AREA)

Abstract

Hüftgelenk-Endoprothese mit einem im Oberschenkelknochen verankerten Prothesenschaft (4) mit einem Anschlußzapfen (5) auf dem ein Kopplungselement (1) angeordnet ist, auf dem ein Kugelkopf (3) befestigt ist, der in einer Pfanne (6) oder einem Pfanneneinsatz gelagert ist, der wiederum im Beckenknochen verankert ist, dadurch gekennzeichnet, daß zwischen dem Kopplungselement (1) und dem Kugelkopf (3) eine biokompatible Zwischenschicht (2) zur form- und/oder kraftschlüssigen Verbindung angeordnet ist.

Description

  • Die Erfindung betrifft eine Hüftgelenk-Endoprothese nach dem Oberbegriff des Anspruchs 1.
  • Aus der DE 40 08 563 A1 ist eine Hüftgelenk-Endoprothese mit einem im Oberschenkelknochen verankerten Prothesenschaft mit einem Anschlußzapfen bekannt, auf dem ein Kopplungselement angeordnet ist. Auf diesem Kopplungselement ist dann der Kugelkopf aufgesetzt, der in einer Pfanne gelagert ist, die wiederum im Beckenknochen verankert ist. Ein Beispiel für das Einsatzgebiet eines derartigen Kopplungselements ist eine Prothese, deren Anschlußzapfen aus einem anderen Material als der Kugelkopf besteht. Außerdem kann dieses Kopplungselement in einem Modularsystem eingesetzt werden, bei dem das Kopplungselement die Anpassung von diversen prothetischen Kugelköpfen und Prothesenschäften ermöglicht.
  • Der Erfindung liegt die Aufgabe zugrunde, eine Hüftgelenk-Endoprothese nach dem Oberbegriff des Anspruchs 1 so zu verbessern, daß eine verbesserte Verbindung des Zwischenelements mit dem Kugelkopf erreicht ist.
  • Erfindungsgemäß wird diese Aufgabe dadurch gelöst, daß zwischen dem Kopplungselement und dem Kugelkopf eine biokompatible Zwischenschicht zur form- und/oder kraftschlüssigen Verbindung angeordnet ist.
  • Diese Zwischenschicht kann z.B. aus Knochenzement (PMMA = Polymethylmethacrylate), einem Edelmetall wie Gold oder aus Polyethylen bestehen. In vorteilhafter Ausführungsform besteht die Zwischenschicht aus einer durch Oberflächenoxidation erzeugten nicht leitenden Schicht. Mit dieser Zwischenschicht ist erreicht, daß eine op timale Kraftübertragung gegeben ist. Wenn die Zwischenschicht nicht leitend, d.h. elektrisch isolierend ist, so ist sie zur Unterbindung von Frettingkorrosion geeignet.
  • Vorteilhafterweise besteht das Kopplungselement aus dem Material des Prothesenschafts, damit keine Frettingkorrosion zwischen dem Anschlußzapfen und dem Kopplungselement auftreten kann.
  • In bevorzugter Ausführungsform ist der Kugelkopf als Schale ausgebildet und weist eine sphärische Innenkontur auf, wobei die Außenkontur des Kopplungselements eine hieran angepaßte sphärische Außenkontur aufweisen muß.
  • Der Kugelkopf besteht bevorzugt aus einem für die Gleitpaarung optimalen Werkstoff, also beispielsweise aus Aluminiumoxid, wenn der Gleitpartner, d.h. die Pfanne, aus Polyethylen oder Aluminiumoxid besteht oder aus einer Kobalt-Chrom-Legierung, wenn der Gleitpartner Polyethylen oder eine Kobalt-Chrom-Legierung ist.
  • Weitere Ausgestaltungen der Erfindung ergeben sich aus der Zeichnung, die nachfolgend beschrieben ist.
  • Mit dem Bezugszeichen 4 ist ein Prothesenschaft bezeichnet, der im Oberschenkelknochen verankert ist. An dem zum Beckenknochen gewandten Ende des Prothesenschaftes 4 weist dieser einen konisch geformten Anschlußzapfen 5 auf, auf dem ein Kopplungselement 1 mit einer angepaßten konischen Bohrung 7 aufgesetzt ist. Das Kopplungselement 1 hat eine sphärische Außenkontur auf die ein Kugelkopf 3 aufgesetzt ist. Der Kugelkopf 3 ist als Schale ausgebildet und weist eine sphärische Innenkontur auf, die an die Außenkontur des Kopplungselements 1 angepaßt ist.
  • Zwischen dem Kopplungselement 1 und dem Kugelkopf 3 ist eine biokompatible Zwischenschicht 2 zur form- und/oder kraftschlüssigen Verbindung angeordnet. Diese Zwischenschicht 2 kann z.B. aus Knochenzement, einem Edelmetall wie Gold oder aus Polyethylen bestehen. Auch kann diese Zwischenschicht aus einer durch Oberflächenoxidation erzeugten elektrisch nicht leitenden Schicht bestehen. Besonders wichtig ist die Kraftübertragung und gleichmäßige Verteilung der Kraft, so daß keine Spannungsspitzen auftreten.
  • Der Kugelkopf 3 ist in einer Pfanne 6 bzw. einem Pfanneneinsatz gelagert. Die Pfanne 6 kann direkt oder über eine weitere Schale im Beckenknochen verankert sein.

Claims (5)

  1. Hüftgelenk-Endoprothese mit einem im Oberschenkelknochen verankerten Prothesenschaft (4) mit einem Anschlußzapfen (5) auf dem ein Kopplungselement (1) angeordnet ist, auf dem ein Kugelkopf (3) befestigt ist, der in einer Pfanne (6) oder einem Pfanneneinsatz gelagert ist, der wiederum im Beckenknochen verankert ist, dadurch gekennzeichnet, daß zwischen dem Kopplungselement (1) und dem Kugelkopf (3) eine biokompatible Zwischenschicht (2) zur form- und/oder kraftschlüssigen Verbindung angeordnet ist.
  2. Hüftgelenk-Endoprothese nach Anspruch 1, dadurch gekennzeichnet, daß die Zwischenschicht (2) aus Knochenzement, Edelmetall wie Gold oder Polyethylen besteht.
  3. Hüftgelenk-Endoprothese nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Zwischenschicht (2) aus einer durch Oberflächenoxidation erzeugten nicht leitenden Schicht besteht.
  4. Hüftgelenk-Endoprothese nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß das Kopplungselement (1) aus dem Material des Prothesenschaftes (4) hergestellt ist.
  5. Hüftgelenk-Endoprothese nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß der Kugelkopf (3) als Schale ausgebildet ist und eine sphärische Innenkontur aufweist und die Außenkontur des Kopplungselementes (1) eine hieran angepaßte sphärische Außenkontur aufweist.
DE19640745A 1996-06-19 1996-10-02 Hüftgelenk-Endoprothese mit Kopplungselement und biokompatibler Zwischenschicht Expired - Fee Related DE19640745B4 (de)

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Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19813074A1 (de) 1998-03-25 1999-09-30 Ceram Tec Ag Innovative Cerami Klemmsitz-Verbindung zwischen Prothesenkomponenten von Gelenk-Prothesen
DE19904437A1 (de) 1999-02-04 2000-08-10 Ceramtec Ag Klemmsitz-Verbindung zwischen Prothesenkomponenten von Gelenk-Prothesen
FR2832309B1 (fr) * 2001-11-21 2004-08-13 Jean Claude Bouvet Tige femorale pour prothese de hanche
DE102005027427A1 (de) * 2005-06-14 2006-12-28 Mathys Ag Bettlach Hüftgelenk-Endoprothese mit modularer Gelenkpfanne
DE102008045291B4 (de) 2008-09-02 2013-05-02 Merete Medical Gmbh Kniearthrodese-Implantat
DE102009035259B4 (de) 2009-07-29 2013-03-07 Merete Medical Gmbh Gelenkprothesen-System
CN106580521B (zh) * 2017-01-10 2018-04-13 李国安 一种复合球头人工髋关节

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DE3802213A1 (de) * 1988-01-26 1989-07-27 Roland Man Druckmasch Gelenkprothese fuer ein hueft- oder kniegelenk
US4908034A (en) * 1983-12-01 1990-03-13 National Research Development Corporation Endoprosthetic bone joint components
EP0385572A1 (de) * 1989-02-28 1990-09-05 Osteonics Corp. Oberschenkelkopfanpasser zur Montage während der Operation
DE4008563A1 (de) * 1989-03-20 1990-09-27 Bristol Myers Squibb Co Prothetische zwischenlagerungs- bzw. kopplungsvorrichtung
EP0470778A1 (de) * 1990-08-08 1992-02-12 Howmedica International Inc. Femurprothese zum Totalersatz des Hüftgelenks
DE4035614C2 (de) * 1990-11-09 1993-01-28 Friedrichsfeld Ag Keramik- Und Kunststoffwerke, 6800 Mannheim, De
DE4337936A1 (de) * 1993-11-06 1995-05-11 Cerasiv Gmbh Sphärische Hüftgelenkpfanne
DE19517843A1 (de) * 1995-05-18 1996-11-21 Gerd Hoermansdoerfer Elastischer Kugelkopf für Hüftgelenkimplantate

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4908034A (en) * 1983-12-01 1990-03-13 National Research Development Corporation Endoprosthetic bone joint components
DE3802213A1 (de) * 1988-01-26 1989-07-27 Roland Man Druckmasch Gelenkprothese fuer ein hueft- oder kniegelenk
EP0385572A1 (de) * 1989-02-28 1990-09-05 Osteonics Corp. Oberschenkelkopfanpasser zur Montage während der Operation
DE4008563A1 (de) * 1989-03-20 1990-09-27 Bristol Myers Squibb Co Prothetische zwischenlagerungs- bzw. kopplungsvorrichtung
EP0470778A1 (de) * 1990-08-08 1992-02-12 Howmedica International Inc. Femurprothese zum Totalersatz des Hüftgelenks
DE4035614C2 (de) * 1990-11-09 1993-01-28 Friedrichsfeld Ag Keramik- Und Kunststoffwerke, 6800 Mannheim, De
DE4337936A1 (de) * 1993-11-06 1995-05-11 Cerasiv Gmbh Sphärische Hüftgelenkpfanne
DE19517843A1 (de) * 1995-05-18 1996-11-21 Gerd Hoermansdoerfer Elastischer Kugelkopf für Hüftgelenkimplantate

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