DE19708375A1 - Fixation of a tibia part of a knee joint endoprosthesis on a tibial plateau - Google Patents

Fixation of a tibia part of a knee joint endoprosthesis on a tibial plateau

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Publication number
DE19708375A1
DE19708375A1 DE19708375A DE19708375A DE19708375A1 DE 19708375 A1 DE19708375 A1 DE 19708375A1 DE 19708375 A DE19708375 A DE 19708375A DE 19708375 A DE19708375 A DE 19708375A DE 19708375 A1 DE19708375 A1 DE 19708375A1
Authority
DE
Germany
Prior art keywords
tibial
knee joint
parts
joint endoprosthesis
tibia
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.)
Withdrawn
Application number
DE19708375A
Other languages
German (de)
Inventor
Dirk Baedorf
Hans-Georg Pfaff
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.)
CeramTec GmbH
Original Assignee
CeramTec GmbH
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 DE19701622 priority Critical
Application filed by CeramTec GmbH filed Critical CeramTec GmbH
Priority to DE19708375A priority patent/DE19708375A1/en
Priority claimed from CA002226240A external-priority patent/CA2226240A1/en
Priority claimed from DE1998506837 external-priority patent/DE59806837D1/en
Publication of DE19708375A1 publication Critical patent/DE19708375A1/en
Application status is Withdrawn legal-status Critical

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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
    • A61F2/38Joints for elbows or knees
    • A61F2/389Tibial components
    • 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
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    • A61F2002/30001Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30108Shapes
    • A61F2002/3011Cross-sections or two-dimensional shapes
    • A61F2002/30112Rounded shapes, e.g. with rounded corners
    • A61F2002/30131Rounded shapes, e.g. with rounded corners horseshoe- or crescent- or C-shaped or U-shaped
    • AHUMAN NECESSITIES
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    • 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
    • A61F2002/30329Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30331Connections 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
    • A61F2002/30332Conically- or frustoconically-shaped protrusion and recess
    • AHUMAN NECESSITIES
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    • 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
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    • 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
    • A61F2002/30329Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30383Connections 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
    • A61F2002/30387Dovetail connection
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    • 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
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    • A61F2002/30329Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30433Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements using additional screws, bolts, dowels or rivets, e.g. connecting screws
    • AHUMAN NECESSITIES
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    • 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
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    • 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
    • A61F2002/30329Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30476Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism
    • A61F2002/30507Connections 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
    • 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
    • A61F2002/30329Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30476Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism
    • A61F2002/30514Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism using a locking washer
    • 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
    • A61F2/46Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
    • A61F2/4637Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for connecting or disconnecting two parts of a prosthesis
    • A61F2002/4641Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for connecting or disconnecting two parts of a prosthesis for disconnecting
    • 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
    • A61F2220/00Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2220/0025Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • 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
    • A61F2220/00Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2220/0025Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2220/0033Connections 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
    • 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
    • A61F2220/00Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2220/0025Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2220/0041Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements using additional screws, bolts, dowels or rivets, e.g. connecting screws
    • 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
    • A61F2230/0004Rounded shapes, e.g. with rounded corners
    • A61F2230/0013Horseshoe-shaped, e.g. crescent-shaped, C-shaped, U-shaped
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
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    • A61F2310/00Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
    • A61F2310/00005The prosthesis being constructed from a particular material
    • A61F2310/00011Metals or alloys
    • A61F2310/00023Titanium or titanium-based alloys, e.g. Ti-Ni alloys
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    • 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
    • A61F2310/00Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
    • A61F2310/00005The prosthesis being constructed from a particular material
    • A61F2310/00179Ceramics or ceramic-like structures

Description

Die Erfindung befrifft eine Kniegelenkendoprothese nach dem Oberbegriff des An spruchs 1. The invention befrifft a knee joint endoprosthesis according to the preamble of claim 1.

Aus der EP 0 442 330 B1 ist eine Kniegelenkendoprothese mit einem Femurteil, ei nem Meniskuselement und einem Tibiateil bekannt, wobei das Femurteil und das Ti biateil mit Lagerflächen an zugeordneten Lagerflächen des Meniskuselements anlie gen. EP 0442330 B1 discloses a knee joint endoprosthesis with a femur part, egg nem meniscus element and a tibial component is known, wherein the femur part and the Ti gene biateil with bearing surfaces on the associated bearing surfaces of the meniscus element anlie.

Das Tibiateil ist mit einem Tibiaplateau fest verbunden, wobei das Tibiaplateau im tibialen Knochen verankert ist und mit diesem verwachsen soll. The tibial component is integral with a tibial plateau, the tibial plateau in the tibial bone anchored and to grow together with this. Femurteil, Tibiateil und Meniskuselement sind bevorzugt aus einem keramischen Werkstoff hergestellt. Femur part, the tibia part and meniscus element are preferably made of a ceramic material.

Der Erfindung liegt die Aufgabe zugrunde, eine mechanisch stabile Verankerung des Tibiateils auf dem Tibiaplateau zu schaffen, die gegebenenfalls auch am implantierten Gelenk nachträglich gelöst und damit das Tibiateil ausgetauscht werden kann. The invention has for its object to provide a mechanically stable anchoring of the tibial part on the tibia plateau, optionally also dissolved in arrears on implanted joint and the tibia part can be replaced.

Erfindungsgemäß wird diese Aufgabe dadurch gelöst, daß das oder die Tibiateile mit dem Tibiaplateau lösbar verklemmt, verschraubt und/oder verspannt sind. According to the invention this object is achieved in that the tibial plateau or the tibial parts with the clamped detachably screwed and / or are clamped.

Hierdurch sind die Tibiateile zwar fest auf dem Tibiaplateau verankert, jedoch ist die Verankerung gegebenenfalls auch am implantierten Gelenk nachträglich lösbar, wo durch das Tibiateil oder die Tibiateile leicht ausgetauscht werden können. In this way, the tibial parts are indeed firmly anchored on the tibial plateau, however, the anchoring is optionally also subsequently releasably to the implanted joint, which can be easily replaced by the tibial component or tibial parts.

In bevorzugter Ausführungsform ist auf dem Tibiaplateau ein Spannelement über eine Fixierschraube befestigt, welches die Tibiateile verklemmt und/oder verspannt. In a preferred embodiment a tensioning element is attached by a fixing screw on the tibial plateau, which clamped the tibial and / or clamped. Durch Lösen der Fixierschraube läßt sich das Spannelement entfernen und so die Tibiateile entnehmen. By loosening the fixing screw, the clamping element and thus remove the tibial parts can be found.

Vorzugsweise ist das Spannelement zwischen den Tibiateilen angeordnet und veran kert gleichzeitig beide Tibiateile auf dem Tibiaplateau. Preferably, the clamping element is disposed between the tibial parts and simultaneously veran kert both tibial parts on the tibial plateau.

Vorteilhafterweise weist die zum Spannelement gewandte Seitenfläche des Tibiateils und die angrenzende Seitenfläche des Spannelements eine zueinander passende Abschrägung auf, wobei die Abschrägung des Spannelements auf der Abschrägung des Tibiateils aufliegt. Advantageously, the facing to the clamping element side surface of the tibia and the adjacent side surface of the clamping member to a mating bevel, wherein the bevel of the tensioning element resting on the bevel of the tibia part. Hierdurch ist eine stabile Verankerung durch Klemmen bzw. Verankern erreicht. A stable anchoring is achieved by clamping or anchoring.

In vorteilhafter Ausgestaltung sind die Tibiateile in eine Einbuchtung des Tibiapla teaus eingelegt. In an advantageous embodiment, the tibial parts in an indentation of Tibiapla are inserted teaus. Dies vereinfacht die Verankerung, da die Tibiateile durch den Rand der Einbuchtung horizontal fixiert sind. This simplifies the anchorage because the tibial parts are fixed horizontally by the edge of the indentation.

Vorteilhafterweise ist zumindest eine der Seitenflächen der Einbuchtung mit einer Ein kerbung versehen, die auf dem Tibiateil aufliegt. Advantageously, one of the side surfaces of the recess is at least provided with a notch A, which rests on the tibia portion. Das Tibiateil weist hierzu eine an die Einkerbung angepaßte Schräge auf, die in die Einkerbung hineinreicht. this the tibia part has a shape adapted to the notch bevel which extends into the notch.

In bevorzugter Ausführungsform bestehen die Tibiateile aus einem keramischen Werkstoff, wie z. In a preferred embodiment, the tibial parts consist of a ceramic material, such. B. Aluminiumoxid, während das Tibiaplateau aus z. As alumina, while the tibial plateau from z. B. einer Titanle gierung besteht. B. a Titanle Government exists.

Weitere Merkmale der Erfindung ergeben sich aus den beiden Figuren, die nachfol gend beschrieben sind. Further features of the invention will become apparent from the two figures, which are described nachfol quietly.

Fig. 1 zeigt einen Schnitt durch einen tibialen Knochen 5 mit aufgesetztem Tibiapla teau 2 und eingesetzten Tibiateilen 1 . Fig. 1 shows a section through a tibial bone 5 with attached Tibiapla Château 2 and tibial parts 1 used. Nicht gezeigt ist der Rest der Kniegelenkendo prothese, nämlich das Femurteil und die Meniskuselemente. the rest of the Kniegelenkendo prosthesis is not shown, namely the femur and the meniscus elements.

Das Tibiaplateau 2 ist plattenförmig ausgebildet und weist eine Einbuchtung 7 auf der zum Femurteil gewandten Seite auf. The tibial plateau 2 is plate-shaped and has a recess 7 on the side facing the femur part side. In diese Einbuchtung 7 sind zwei Tibiateile 1 aus einem keramischen Werkstoff eingesetzt. In this recess 7, two tibial parts 1 are inserted from a ceramic material. Diese Tibiateile 1 berühren die Seitenflä chen der Einbuchtung 7 und sind über ein mittig angeordnetes Spannelement 3 ver ankert. This tibial 1 touch the Seitenflä surfaces of the recess 7 and are anchored ver about a centrally disposed clamping element. 3 Das Spannelement 3 ist über eine Fixierschraube 4 auf dem Tibiaplateau 2 befestigt. The clamping element 3 is fixed via a fixing screw 4 on the tibial plateau. 2 Das Spannelement 3 verklemmt und/oder verspannt gleichzeitig beide Tibia teile 1 . The clamping element 3 clamped and / or distorted at the same time both tibia parts. 1

Zur besseren Verankerung sind die aneinanderliegenden Seitenflächen des Tibiateils 1 und des Spannelements 3 mit einer zueinanderpassenden Abschrägung 6 verse hen, wobei die Abschrägung des Spannelements 3 auf der Abschrägung des Tibia teils 1 aufliegt. For better anchorage are the adjacent side surfaces of the tibia part 1 and the clamping element 3 with a mating bevel shipping 6 hen, the bevel of the clamping member 3 rests on the bevel of the tibia part 1.

Zur zusätzlichen Verankerung ist mindestens eine der Seitenflächen der Einbuchtung 7 mit einer Einkerbung 8 versehen, in die die angrenzende Seitenfläche des Tibiateils 1 hineinragt, so daß die Seitenfläche der Einkerbung 8 auf der Schräge des Tibiateils 1 aufliegt. For additional anchoring one of the side surfaces of the recess 7 is at least provided with a notch 8 in which the adjacent side surface of the tibia part 1 protrudes, so that the side surface 8 of the notch rests on the bevel of the tibia portion. 1 Diese Einkerbung 8 ist vorteilhafterweise auf allen Seitenflächen des Ti biaplateaus 2 angeordnet. This notch 8 is advantageously arranged on all side surfaces of the Ti biaplateaus. 2

Die Tibiateile 1 bestehen aus einem keramischen Werkstoff, während das Spannele ment 3 wie auch das Tibiaplateau 2 aus einer Titanlegierung hergestellt sind. The tibial 1 consist of a ceramic material, while the Spannele element 3 as well as the tibial plateau 2 are made of a titanium alloy.

Durch Lösen der Fixierschraube 4 und Entfernen des Spannelements 3 läßt sich das Tibiateil 1 bzw. die beiden Tibiateile 1 leicht aus dem Tibiaplateau 2 nach medial ent nehmen. By loosening the fixing screw 4 and removal of the clamping element 3, the tibial component 1 or the two tibial parts 1 can be easily removed from the tibial plateau 2 to take medial ent.

Fig. 2 zeigt eine Draufsicht auf ein Tibiaplateau 2 mit eingesetzten Tibiateilen 1 ge mäß der fig. Fig. 2 shows a plan view of a tibial tray of Figure 2 with inserted tibial parts 1 ge undue. 1 von der Femurseite. 1 of the femur. Gut zu erkennen ist, wie das Spannelement 3 auf der Abschrägung 6 (siehe Fig. 1) der Tibiateile 1 aufliegt und diese so festlegt. Can be clearly seen how the clamping element 3 on the chamfer 6 (see Fig. 1) of the tibial parts 1 rests and lays them down so on.

Die Tibiateile 1 können auch direkt mit dem Tibiaplateau 2 verschraubt sein. The tibial parts 1 can also be screwed directly to the tibial plateau. 2 Hierzu ist eine Bohrung in den Tibiateilen 1 erforderlich, in der eine Schraube eingelassen ist. To this end, a bore in the tibial parts 1 is required, is embedded in a bolt. Die Befestigung kann auf alle erdenklichen Arten erfolgen, sie muß jedoch lösbar ausgebildet sein. They can be mounted in every way possible, but it must be designed to be detachable.

Claims (7)

1. Kniegelenkendoprothese mit einem im Femur verankerten Femurteil und einem mit dem tibialen Knochen verbundenen Tibiaplateau ( 2 ) auf dem als Gleitflächen Tibiateile ( 1 ) angeordnet sind und vorzugsweise mit zwischen dem Femurteil und den Tibiateilen ( 1 ) angeordneten Meniskuselementen, dadurch gekennzeich net , daß das oder die Tibiateile ( 1 ) mit dem Tibiaplateau ( 2 ) lösbar verklemmt, verschraubt und/oder verspannt sind. 1. A knee joint endoprosthesis are provided with an anchored in the femur femur part and a part connected to the tibial bone tibial plateau (2) on the sliding surfaces of the tibial parts (1) and preferably wherein net gekennzeich with disposed between the femoral component and the tibial parts (1) meniscus elements that are the one or more tibial parts (1) clamped to the tibia plateau (2) is removably screwed and / or clamped.
2. Kniegelenkendoprothese nach Anspruch 1, dadurch gekennzeichnet, daß auf dem Tibiaplateau ( 2 ) ein Spannelement ( 3 ) über eine Fixierschraube ( 4 ) befe stigt ist, welches die Tibiateile ( 1 ) verklemmt und/oder verspannt. 2. A knee joint endoprosthesis according to claim 1, characterized in that on the tibial plateau (2) a clamping element (3) BEFE via a fixing screw (4) is Stigt which clamped the tibial parts (1) and / or clamped.
3. Kniegelenkendoprothese nach Anspruch 2, dadurch gekennzeichnet, daß das Spannelement ( 3 ) zwischen den Tibiateilen ( 1 ) angeordnet ist und gleichzeitig beide Tibiateile ( 1 ) auf dem Tibiaplateau ( 2 ) verankert. 3. A knee joint endoprosthesis according to claim 2, characterized in that the clamping element (3) is disposed between the tibial parts (1) and anchored to the tibia plateau (2) simultaneously both tibial parts (1).
4. Kniegelenkendoprothese nach Anspruch 2 oder 3, dadurch gekennzeichnet, daß die zum Spannelement ( 3 ) gewandte Seitenfläche des Tibiateils ( 1 ) und die angrenzende Seitenfläche des Spannelements ( 3 ) eine zueinanderpassende Abschrägung aufweisen, wobei die Abschrägung des Spannelements ( 3 ) auf der Abschrägung des Tibiateils ( 1 ) aufliegt. 4. A knee joint endoprosthesis according to claim 2 or 3, characterized in that the facing to the clamping element (3) side surface of the tibia part (1) and the adjacent side surface of the clamping element (3) have a mutually matching chamfer, wherein the bevel of the clamping element (3) on the bevel of the tibia part (1) rests.
5. Kniegelenkendoprothese nach einem der Ansprüche 1 bis 4, dadurch gekenn zeichnet, daß die Tibiateile ( 1 ) in eine Einbuchtung ( 7 ) des Tibiaplateaus ( 2 ) eingelegt sind. 5. Knee endoprosthesis is characterized according to one of claims 1 to 4, terized in that the tibial parts are inserted in an indentation (7) of the tibial plateau (2) (1).
6. Kniegelenkendoprothese nach Anspruch 5, dadurch gekennzeichnet, daß zu mindest eine der Seitenflächen der Einbuchtung ( 7 ) mit einer Einkerbung ( 8 ) versehen ist, die auf dem Tibiateil ( 1 ) aufliegt. 6. A knee joint endoprosthesis according to claim 5, characterized in that at least one of the side surfaces of the recess (7) is provided with a notch (8) which rests on the tibia part (1).
7. Kniegelenkendoprothese nach einem der Ansprüche 1 bis 6, dadurch gekenn zeichnet, daß die Tibiateile ( 1 ) aus einem keramischen Werkstoff bestehen. 7. A knee joint endoprosthesis according to one of claims 1 to 6, characterized in that the tibial (1) consist of a ceramic material.
DE19708375A 1997-01-17 1997-03-01 Fixation of a tibia part of a knee joint endoprosthesis on a tibial plateau Withdrawn DE19708375A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19701622 1997-01-17
DE19708375A DE19708375A1 (en) 1997-01-17 1997-03-01 Fixation of a tibia part of a knee joint endoprosthesis on a tibial plateau

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
DE19708375A DE19708375A1 (en) 1997-01-17 1997-03-01 Fixation of a tibia part of a knee joint endoprosthesis on a tibial plateau
CA002226240A CA2226240A1 (en) 1997-01-17 1998-01-06 Fixation of a tibial part on a tibial plate of a knee-joint endoprosthesis
EP98100245A EP0855172B1 (en) 1997-01-17 1998-01-09 Fastening of a tibial piece on a tibilal tray of a knee prosthesis
DE1998506837 DE59806837D1 (en) 1997-01-17 1998-01-09 Fixation of a tibia part on a tibia plateau of a knee joint endoprosthesis
JP10005914A JPH10201780A (en) 1997-01-17 1998-01-14 Intracorporeal protease for knee joint
US09/008,428 US5968099A (en) 1997-01-17 1998-01-16 Fixation of a tibial part on a tibial plate of a knee-joint endoprosthesis

Publications (1)

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DE19708375A1 true DE19708375A1 (en) 1998-07-23

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DE19708375A Withdrawn DE19708375A1 (en) 1997-01-17 1997-03-01 Fixation of a tibia part of a knee joint endoprosthesis on a tibial plateau

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DE10057675A1 (en) * 2000-11-21 2002-05-29 Andrej Nowakowski Knee endoprosthesis
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US7037341B2 (en) 2000-11-21 2006-05-02 Andrej Nowakowski Knee joint endoprosthesis system

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