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Bandscheibenendoprothese

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Publication number
DE4208115A1
DE4208115A1 DE19924208115 DE4208115A DE4208115A1 DE 4208115 A1 DE4208115 A1 DE 4208115A1 DE 19924208115 DE19924208115 DE 19924208115 DE 4208115 A DE4208115 A DE 4208115A DE 4208115 A1 DE4208115 A1 DE 4208115A1
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DE
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DE19924208115
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English (en)
Inventor
Karin Dr Buettner-Janz
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LINK WALDEMAR GmbH CO
Waldemar LINK GmbH and Co KG
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LINK WALDEMAR GMBH CO
Waldemar LINK GmbH and Co KG
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Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2/44Joints for the spine, e.g. vertebrae, spinal discs
    • A61F2/442Intervertebral or spinal discs, e.g. resilient
    • A61F2/4425Intervertebral or spinal discs, e.g. resilient made of articulated components
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86Threaded wires, pins or screws; Nuts therefor
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2002/30001Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30108Shapes
    • A61F2002/3011Cross-sections or two-dimensional shapes
    • A61F2002/30138Convex polygonal shapes
    • A61F2002/30156Convex polygonal shapes triangular
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2002/30001Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316The 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
    • A61F2002/30535Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30576Special structural features of bone or joint prostheses not otherwise provided for with extending fixation tabs
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2002/30001Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30621Features concering the anatomical functioning or articulation of the prosthetic joint
    • A61F2002/30639Features concering the anatomical functioning or articulation of the prosthetic joint having rolling elements between both articulating surfaces
    • A61F2002/30642Features concering the anatomical functioning or articulation of the prosthetic joint having rolling elements between both articulating surfaces having a single rolling (or sliding) ball articulating between two cups
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2002/30001Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30621Features concering the anatomical functioning or articulation of the prosthetic joint
    • A61F2002/30649Ball-and-socket joints
    • A61F2002/30663Ball-and-socket joints multiaxial, e.g. biaxial; multipolar, e.g. bipolar or having an intermediate shell articulating between the ball and the socket
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2/30767Special external and/or bone-contacting surfaces, e.g. coating for improving bone ingrowth
    • A61F2/30771Special external and/or bone-contacting surfaces, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes, grooves
    • A61F2002/3082Grooves
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2/30767Special external and/or bone-contacting surfaces, e.g. coating for improving bone ingrowth
    • A61F2/30771Special external and/or bone-contacting surfaces, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes, grooves
    • A61F2002/30841Sharp anchoring protrusions for impaction into the bone, e.g. sharp pins, spikes
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2/30767Special external and/or bone-contacting surfaces, e.g. coating for improving bone ingrowth
    • A61F2/30771Special external and/or bone-contacting surfaces, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes, grooves
    • A61F2002/30878Special external and/or bone-contacting surfaces, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes, grooves with non-sharp protrusions, for instance contacting the bone for anchoring, e.g. keels, pegs, pins, posts, shanks, stems, struts
    • A61F2002/30891Plurality of protrusions
    • A61F2002/30892Plurality of protrusions parallel
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2/44Joints for the spine, e.g. vertebrae, spinal discs
    • A61F2/442Intervertebral or spinal discs, e.g. resilient
    • A61F2/4425Intervertebral or spinal discs, e.g. resilient made of articulated components
    • A61F2002/443Intervertebral or spinal discs, e.g. resilient made of articulated components having two transversal endplates and at least one intermediate component
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2230/00Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2230/0002Two-dimensional shapes, e.g. cross-sections
    • A61F2230/0017Angular shapes
    • A61F2230/0023Angular shapes triangular

Description

Die Erfindung betrifft eine Bandscheibenendoprothese, die eine Grund- und eine Deckplatte umfaßt, die jeweils mit einem Wirbelkörper zu verbinden sind.

Bei bekannten Bandscheibenendoprothesen dieser Art (EP-OS 01 76 728; Prospekt "LINK Zwischenwirbelendoprothese Modell SB-Charit´" der Firma W. Link, 1988; FR-A-26 59 226), sind auf den den Wirbeln zugewendeten Außenseiten der Platten Zähne oder Vorsprünge vorgesehen, die in die Oberfläche der Wirbel­ körper eindringen und dadurch die Prothese im Zwischenwirbel­ raum festhalten. Dies reicht im allgemeinen selbst dann aus, wenn die Zwischenwirbelräume sich in infolge einer vermehrten Lordose nach vorne hin keilförmig verstärkt öffnen. Deshalb ist eine zusätzlich Fixierung der Prothese an den zugehörigen Wirbelkörpern bislang nicht für notwendig gehalten worden. Jedoch hat die Erfindung erkannt, daß es Fälle gibt, in denen die Wirksamkeit der Zähne beeinträchtigt ist, beispielsweise wenn Welligkeit oder Krümmung der Wirbelkörperendplatten die Zähne an hinreichendem Eindringen hindert.

Erfindungsgemäß wird die Haltesicherheit der Prothese dadurch erhöht, daß die Grund- und/oder die Deckplatte der Prothese mit Schraubbefestigungseinrichtungen versehen sind, die mit dem jeweils zugehörigen Wirbelkörper zusammenwirken.

Die Schraubfixation von Prothesen am Knochen ist an sich bekannt. Jedoch wird sie nur dann angewendet, wenn eine Fixation auf andere Weise nicht möglich erscheint. Bei Band­ scheibenendoprothesen schien die eingangs geschilderte Fixati­ on aufgrund der herrschenden Annahme über die Form der Wirbel­ körperendplatten auszureichen. Die Erfindung beruht demgemäß auf der Erkenntnis, daß diese Annahme nicht immer zutrifft.

Zweckmäßigerweise sind die Schraubbefestigungseinrichtungen am ventralen Rand der Prothese angeordnet. Zum einen ist dieser am besten zugänglich. Zum anderen steht hier in vielen Fällen mehr Platz für die Schraubenfixierung zur Verfügung, da man häufig das Gelenkzentrum der Prothese aus dem Zentrum des Zwi­ schenwirbelraums weiter nach hinten verlegt, um einen günsti­ geren Kraftverlauf zu erzielen. Die Schraubfixation und die Verschiebung des Gelenkzentrums nach hinten können auch insofern im Sinne der Prothesenfixation zusammenwirken, als die Lordosierung um so geringer ist, je weiter hinten das Gelenkzentrum der Prothese liegt. Um so geringer sind auch die Kräfte, die infolge keilförmiger Öffnung des Wirbelzwischen­ raums die Prothese nach vorne drängen.

Meist genügt es, die Schraubfixierung lediglich bei der Grundplatte oder der Deckplatte vorzunehmen.

Bei einer einfachen und deshalb zweckmäßigen Ausführungsform der Erfindung bestehen die Schraubbefestigungseinrichtungen aus wenigstens einer Bohrung zur Aufnahme einer Knochenschrau­ be. Diese Bohrung kann am Rand der eigentlichen Grund- bzw. Deckplatte angeordnet sein und demzufolge eine Richtung haben, die quer, ggf. ein wenig schräg, zur Plattenebene verläuft. Sie kann auch in einer laschenförmigen Verlängerung der Platte angeordnet sein, wobei die Lasche in der Plattenebene liegt. Mitunter genügt auch eine randoffene Ausnehmung an der Platte, die mit der Befestigungsschraube zusammenwirkt, wobei die Schraube im Zusammenwirken mit der Ausnehmung eine nach vorne oder nach schräg vorne gerichtet Verlagerung der Prothese verhindert. Eine Verlagerung nach hinten ist ohnehin in der Regel nicht zu erwarten. Schließlich können die Befestigungs­ einrichtungen auch von einer Lasche gebildet sein, die gegen­ über der Plattenebene abgekantet ist und an die Vorderseite des Wirbels angelegt wird, um eine von vorne nach hinten gerichtet Knochenschraube aufzunehmen. Die Lasche kann auch in die Vorderseite des Wirbel eingebettet sein, um eine etwaige Gefährdung der unmittelbar vor den Wirbeln verlaufenden Blutgefäße zu vermeiden.

Wenn in diesem Zusammenhang von der Schraubbefestigung, der Bohrung oder der Lasche in der Einzahl gesprochen wird, so bedeutet dies nicht, daß nur eine einzige Schraubbefestigung angewendet werden soll. Es können auch mehrere Schraubbefe­ stigungen, insbesondere in paarig symmetrischer Anordnung, vorgesehen werden.

Die Erfindung wird im folgenden näher unter Bezugnahme auf die Zeichnung erläutert, die vorteilhafte Ausführungsbeispiele veranschaulicht. Es zeigt

Fig. 1 einen Medianschnitt einer ersten Ausführungs­ form der Prothese zwischen zwei Wirbelkörpern,

Fig. 2 eine entsprechend Ansicht von vorne,

Fig. 3 eine Draufsicht auf die Deckplatte einer zweiten Ausführungsform der Prothese am Wirbelkörper und

Fig. 4 eine Ansicht von vorne von derselben Anordnung,

Fig. 5 eine Draufsicht auf eine dritte Ausführungsform der Prothesenplatte mit randoffenen Schraubenausneh­ mungen, und

Fig. 6 eine vierte Ausführungsform, bei welcher die Schrauböffnungen in Laschen angeordnet sind.

Die Prothese besteht aus einer Deckplatte 1 und einer Grund­ platte 2, die übereinstimmend spiegelbildlich ausgebildet sind und aus Metall bestehen und zwischen sich einen Prothesenkern 3 aus Polyethylen einschließen. Die Prothesenplatten 1, 2 und der Prothesenkern 3 wirken über sphärische Gelenkflächen 4 zusammen. Der Kern 3 weist einen Randwulst 5 auf, der seinen Bewegungsspielraum eingrenzt und auch unter Extrembedingungen für den Zusammenhalt der Prothese sorgt. Der Kern kann in einer anderen Ausführung mit einer der Platten fest verbunden sein.

Die etwa ebenen Endplatten 6 der Prothesenplatten 1, 2 liegen auf den Endflächen der Wirbelkörper auf. Sie sind mit einer Anzahl (beispielsweise sechs) Zähnen 7 versehen, die in die Wirbelkörper unter Belastung eindringen und dadurch die Prothese an Ort und Stelle sichern. Soweit kann die Prothese als bekannt betrachtet werden.

In der ersten Ausführungsform gemäß Fig. 1 und 2 sind am vorderen Rand 8 der Prothesenplatten 1, 2, der über die Vorderkanten der Wirbelkörper hinwegragt, Laschen 9 angeord­ net, die sich etwa parallel zur nach vorne gewendeten Wirbel­ körperoberfläche winklig zur Prothesenplatte 1, 2 erstrecken und an der Wirbelkörperoberfläche anliegen. Sie enthalten Bohrungen 10 zur Aufnahme von Schrauben 11, die dank der ventral offenen Lage der Laschen 9 leicht eingebracht werden können und mit der harten, vorderen Knochenrinde der Wirbel­ körper sicher zusammenwirken. Sie sind symmetrisch so angeord­ net, daß der ventrale Mittelbereich frei bleibt, so daß sich dort in der Nähe wichtiger Blutgefäße keine Schrauben befin­ den. Die Schrauben 11 verlaufen mit überwiegend parallel zu den Prothesenplatten 1, 2 verlaufender Hauptrichtung. Entspre­ chend können auch die Bohrungen 10 in den Laschen 9 verlaufen.

In einer Abwandlung dieser Ausführungsform werden die Laschen 9 in die Wirbelkörper vorderseitig eingebettet, so daß sie nicht vorstehen und weder ihre Kanten noch die Schraubenköpfe die vor den Wirbelkörpern befindlichen Organe gefährden, insbesondere die dort verlaufenden Blutgefäße.

Fig. 1 zeigt das Gelenkzentrum der Prothese etwa zentrisch im Verhältnis zu den beiden angrenzenden Wirbelkörpern. Wird dieselbe Prothese so implantiert, daß die Laschen 9 in die Vorderseite der Wirbelkörper eingebettet sind, verlagert sich das Bewegungszentrum ein wenig nach hinten, was im Sinne eines günstigen Kraftverlaufs mitunter bevorzugt wird.

Diese Verlagerung des Gelenkzentrums nach hinten erkennt man auch in der zweiten Ausführungsform der Darstellung der Fig. 3. Dabei sind die Bohrungen 12 für die Knochenschrauben 11 im Rand der Prothesenlatte 1, 2 untergebracht. Die Knochensch­ rauben 11 verlaufen daher im wesentlichen quer zur Ebene der Prothesenplatten.

In der Ausführung gemäß Fig. 5 sind die Bohrungen 13 für die Knochenschrauben derart in den Randbereich der Prothesenplatte 1, 2 verlagert, daß sie randoffen sind. Dadurch wird im Vergleich mit der Ausführung gemäß Fig. 3 Platz gespart, der demzufolge für eine größere, kraftübertragende Gelenkfläche zur Verfügung steht. Zur Fixation der Prothese reichen die randoffenen Ausnehmungen in der Regel aus, da in der Regel nicht mit Kräften zu rechnen ist, die die Prothese nach hinten verlagern könnten.

Schließlich können gemäß der Ausführungsform, die in Fig. 6 dargestellt ist, die Bohrungen 14 für die Knochenschrauben auch in besonderen Laschen 15 vorgesehen sein, die in der Ebene der Prothesenplatten 1, 2 nach vorne ragen. Diese Anordnung bietet sich insbesondere in den Fällen an, in denen eine starke Verlagerung des Gelenkzentrums 16 nach hinten beabsichtigt ist.

Claims (6)

1. Bandscheibenendoprothese, die zwischen zwei Wirbelkörper einzusetzen ist und eine Grundplatte (2) und eine Deck­ platte (1) aufweist, dadurch gekennzeichnet, daß die Grund- und/oder die Deckplatte der Prothese mit Schraubbe­ festigungseinrichtungen (9 bis 15) versehen sind.
2. Bandscheibenendoprothese nach Anspruch 1, dadurch gekenn­ zeichnet, daß die Schraubbefestigungseinrichtungen am vorderen Rand an wenigstens einer der Platten (1, 2) der Prothese angeordnet sind.
3. Bandscheibenendoprothese nach Anspruch 2, dadurch gekenn­ zeichnet, daß das Gelenkzentrum der Prothese gegenüber dem Zentrum der Wirbelkörperendplatten nach hinten verlagert ist.
4. Bandscheibenendoprothese nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Schraubbefestigungsein­ richtungen wenigstens eine Bohrung (10, 12, 13, 14) zur Aufnahme einer Knochenschraube (11) umfassen.
5. Bandscheibenendoprothese nach Anspruch 4, dadurch gekenn­ zeichnet, daß die Bohrung (12 bis 14) eine quer zur Plattenebene verlaufende Richtung aufweist.
6. Bandscheibenendoprothese nach Anspruch 5, dadurch gekenn­ zeichnet, daß die Bohrung (10) in einer Abkantung (9) der Platte (1, 2) vorgesehen ist und ihre Richtung parallel oder spitzwinklig zu der Plattenebene verläuft.
DE19924208115 1992-03-13 1992-03-13 Bandscheibenendoprothese Withdrawn DE4208115A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19924208115 DE4208115A1 (de) 1992-03-13 1992-03-13 Bandscheibenendoprothese

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
DE19924208115 DE4208115A1 (de) 1992-03-13 1992-03-13 Bandscheibenendoprothese
DE1993508489 DE59308489D1 (de) 1992-03-13 1993-02-25 Bandscheibenendoprothese
EP19930102992 EP0560140B1 (de) 1992-03-13 1993-02-25 Bandscheibenendoprothese
ES93102992T ES2117064T3 (es) 1992-03-13 1993-02-25 Endoprotesis de disco intervertebral.
JP5058393A JP3181131B2 (ja) 1992-03-13 1993-03-11 椎間板内部補綴具
US08287701 US5556431A (en) 1992-03-13 1994-08-09 Intervertebral disc endoprosthesis

Publications (1)

Publication Number Publication Date
DE4208115A1 true true DE4208115A1 (de) 1993-09-16

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DE19924208115 Withdrawn DE4208115A1 (de) 1992-03-13 1992-03-13 Bandscheibenendoprothese

Country Status (5)

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US (1) US5556431A (de)
JP (1) JP3181131B2 (de)
DE (1) DE4208115A1 (de)
EP (1) EP0560140B1 (de)
ES (1) ES2117064T3 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
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DE10145668A1 (de) * 2001-09-10 2003-04-03 Aesculap Ag & Co Kg Implantat
WO2005094734A1 (de) 2004-03-30 2005-10-13 Hjs Gelenk System Gmbh Künstliche zwischenwirbelscheibe

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DE10145668C2 (de) * 2001-09-10 2003-07-10 Aesculap Ag & Co Kg Implantat
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Also Published As

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JP3181131B2 (ja) 2001-07-03 grant
ES2117064T3 (es) 1998-08-01 grant
EP0560140B1 (de) 1998-05-06 grant
EP0560140A1 (de) 1993-09-15 application
US5556431A (en) 1996-09-17 grant
JPH067390A (ja) 1994-01-18 application

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