DE10361780A1 - Tibial plateau component for a knee endoprosthesis - Google Patents
Tibial plateau component for a knee endoprosthesis Download PDFInfo
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- DE10361780A1 DE10361780A1 DE10361780A DE10361780A DE10361780A1 DE 10361780 A1 DE10361780 A1 DE 10361780A1 DE 10361780 A DE10361780 A DE 10361780A DE 10361780 A DE10361780 A DE 10361780A DE 10361780 A1 DE10361780 A1 DE 10361780A1
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- sliding
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- 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
- A61F2/3868—Joints for elbows or knees with sliding tibial bearing
-
- 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
-
- 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
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30108—Shapes
- A61F2002/3011—Cross-sections or two-dimensional shapes
- A61F2002/30112—Rounded shapes, e.g. with rounded corners
- A61F2002/30131—Rounded shapes, e.g. with rounded corners horseshoe- or crescent- or C-shaped or U-shaped
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- 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
- A61F2002/30398—Sliding
- A61F2002/30401—Sliding with additional means for preventing or locking said sliding
-
- 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
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- 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
- A61F2002/30878—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
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
- A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
- A61F2002/30878—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves with non-sharp protrusions, for instance contacting the bone for anchoring, e.g. keels, pegs, pins, posts, shanks, stems, struts
- A61F2002/30891—Plurality of protrusions
- A61F2002/30892—Plurality of protrusions 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
- A61F2220/00—Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2220/0025—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2230/0002—Two-dimensional shapes, e.g. cross-sections
- A61F2230/0004—Rounded shapes, e.g. with rounded corners
- A61F2230/0013—Horseshoe-shaped, e.g. crescent-shaped, C-shaped, U-shaped
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- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Physical Education & Sports Medicine (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Prostheses (AREA)
Abstract
Die Erfindung betrifft eine Tibiaplateaukomponente für eine Knieendoprothese, umfassend eine Tibiagleitkomponente (10), die über die Tibiagleitfläche (30) mit einer Femurkomponente (20) in gleitendem Kontakt steht und eine in der Tibia verankerte, die Tibiagleitkomponente tragende Tibiabasiskomponente (40), wobei die Tibiagleitfläche (30) mindestens entlang eines Sagittalebenenschnittes die Form eines Zylindermantelabschnittes aufweist. Der Gleitflächenradius (RG) des Zylindermantelabschnittes ist dabei gleich oder größer einem größten Femurradius (RF) der Femurkomponente (20). Weiterhin weist eine Kopplungsfläche (50) zwischen der Tibiagleitkomponente (10) und der Tibiabasiskomponente (40), die die Form eines Zylindermantelabschnittes hat, einen Kopplungsflächenradius (RK) auf, dessen Größe mindestens gleich der Größe des um den Betrag der mittleren Dicke (D) der Tibiagleitkomponente erhöhten Gleitflächenradius (RG) ist.The invention relates to a tibial plateau component for a knee endoprosthesis, comprising a tibial gliding component (10) which is in sliding contact with a femoral component (20) via the tibial guide surface (30) and a tibial base component (40) anchored in the tibia and carrying the tibial gliding component Tibiagleitfläche (30) has at least along a Sagittalebenenschnittes the shape of a cylinder jacket portion. The sliding surface radius (RG) of the cylinder jacket section is equal to or greater than a largest femur radius (RF) of the femoral component (20). Furthermore, a coupling surface (50) between the tibial guide component (10) and the tibial base component (40), which has the shape of a cylinder jacket section, has a coupling surface radius (RK) at least equal to the size of the central thickness (D). the tibial component is increased sliding surface radius (RG).
Description
Die Erfindung betrifft eine Tibiaplateaukomponente für eine Knieendoprothese nach dem Oberbegriff des Anspruchs 1.The The invention relates to a tibial plateau component for a knee endoprosthesis the preamble of claim 1.
Für den Fall, dass Gleitflächen der Kniegelenke eines Patienten abgenutzt sind und endoprothetisch ersetzt werden müssen, werden vorzugsweise Knie-Endoprothesen angewendet, die sich aus einer oder zwei Femurkomponenten, der Tibiabasskomponente und den Tibiaplateau-Gleitkomponenten zusammensetzen. Hierbei werden die femuralen und tibialen Gleitflächen durch kufenartige Metallbauteile ersetzt. Die Tibiaplateaukomponente besteht aus einer in der Tibia verankerten Tibiabasiskomponente und mindestens einer und allgemeinen zwei auf diese Basiskomponente aufgeschobenen endoprothetischen Tibiagleitflächen. Die Tibiabasiskomponente besteht vorzugsweise aus einer gewebeverträglichen in den Knochen verankerten Metallkomponente, während die Tibiagleitkomponente aus einem Kunststoffmaterial ausgeführt ist und in der Tibiabasiskomponente verankert wird.In the case, that sliding surfaces The knee joints of a patient are worn and endoprosthesis have to be replaced It is preferable to use knee endoprostheses made up of one or two femoral components, the tibial obesity component and the Assemble the tibial plateau sliding components. Here are the femoral and tibial sliding surfaces replaced by skid-like metal components. The tibial plateau component consists of a tibial abdominal component anchored in the tibia and at least one and two generally to this base component deferred endoprosthetic tibial sliding surfaces. The tibial base component preferably consists of a tissue-compatible anchored in the bone Metal component while the Tibiagleitkomponente is made of a plastic material and anchored in the tibial base component.
Derartige
endoprothetische Elemente werden beispielsweise in der deutschen
Patentschrift
Eine
weitere Ausführungsform
einer derartigen Tibiaplateaukomponente ist in der
Eine
weitere Ausführungsform
wird in der
Bei allen genannten Ausführungsformen ist jedoch eine gewisse Dehnung des Bandapparates unvermeidlich. Diese resultiert daraus, dass die Tibiagleitkomponente spätestens beim Einrast- bzw. Verankerungsvorgang mit der im Knochen befestigten Basiskomponente um einen definierten Betrag angehoben werden muß, um anschließend in die Verrastungen eingreifen zu können. Ein Aufweiten des Gelenkspaltes des Knies und eine daraus hervorgehende irreversible Dehnung des Bandapparates ist daher unvermeidlich und stellt vor allem bei einem an sich vor der endoprothetischen Versorgung vollkommen intakten Bandapparat ein zusätzliches OP-Trauma bei der Implantation der Knieendoprothese dar, das unter allen Umständen vermieden werden sollte.at All mentioned embodiments However, a certain elongation of the ligaments is inevitable. This results from the fact that the Tibiagleitkomponente no later than during latching or anchoring process with the attached in the bone Base component must be raised by a defined amount, then in to intervene the locking. An expansion of the joint space of the knee and a resulting irreversible stretching of the ligamentous apparatus is therefore inevitable and Especially in a per se before the endoprosthetic care completely intact ligament an additional surgical trauma during implantation of the knee endoprosthesis, which are avoided at all costs should.
Es ist daher Aufgabe der Erfindung, eine Tibiaplateaukomponente anzugeben, die eine minimalinvasive und einfache Implantation erlaubt und insbesondere eine irreversible Dehnung des Bandapparates vermeidet.It It is therefore an object of the invention to provide a tibial plateau component, which allows a minimally invasive and simple implantation and in particular prevents irreversible stretching of the ligamentous apparatus.
Die Aufgabe wird mit einer Tibiaplateaukomponente für eine Knieendoprothese gemäß den Merkmalen des Anspruchs 1 gelöst.The The object is a tibial plateau component for a knee endoprosthesis according to the features of claim 1.
Die Tibiaplateaukomponente für eine Knieendoprothese umfasst eine Tibiagleitkomponente mit einer Tibiagleitfläche, die in gleitendem Kontakt mit einer Femurkomponente steht und eine in der Tibia verankerte, die Tibiagleitkomponente tragende Tibiabasiskomponente und ist erfindungsgemäß dadurch gekennzeichnet, dass die Tibiagleitfläche mindestens entlang eines Sagittalebenenschnittes die Form eines Zylindermantelausschnittes aufweist, wobei der Gleitflächenradius des Zylindermantelabschnittes gleich oder größer dem größten Radius der Femurkomponente ist. In Verbindung damit ist die Tibiaplateaukomponente weiterhin dadurch gekennzeichnet, dass die Kopplungsfläche zwischen der Tibiagleitkomponente und der Tibiabasiskomponente die Form eines Zylindermantelabschnittes hat und einen Kopplungsflächenradius aufweist, dessen Größe mindestens gleich der Größe des um den Betrag der mittleren Dicke der Tibiagleitkomponente erhöhten Gleitflächenradius ist.The tibial plateau component for a knee endoprosthesis comprises a tibial gliding component having a tibial sliding surface in sliding contact with a femoral component and a tibial abdominal component anchored in the tibia and bearing the tibial gliding component, and is characterized in that the tibial gliding surface is in the shape of a cylindrical skirt at least along a sagittal plane section; wherein the Gleitflächenradius the cylinder barrel portion is equal to or greater than the largest radius of the femoral component. In connection with this, the tibial plateau component is further characterized in that the coupling surface between the tibial component and the tibial base component is in the shape of a cylinder barrel portion, and ei NEN has a coupling surface radius whose size is at least equal to the size of the increased by the amount of the average thickness of the Tibiagleitkomponente Gleitflächenradius.
Vorstehendes bedeutet, dass die mit der Femurkomponente in Kontakt stehende Gleitfläche, d.h. die Oberfläche der Tibiagleitkomponente, die Form eines Teils eines Zylindermantels aufweist. Die Unterseite der Tibiagleitkomponente wird ebenfalls durch die Form eines Zylindermantels beschrieben.prominent means that the sliding surface in contact with the femoral component, i. the surface the tibial component, the shape of a part of a cylinder jacket having. The underside of the Tibiagleitkomponente is also by described the shape of a cylinder jacket.
Der innere Radius des Zylindermantels entspricht erfindungsgemäß einem größten Radius der Femurkomponente. Die Größe des äußeren Radius des Zylindermantels wird durch Summe des inneren Radius zuzüglich der Dicke der Tibiagleitkomponente gebildet.Of the inner radius of the cylinder jacket according to the invention corresponds to a largest radius the femoral component. The size of the outer radius of the Cylinder jacket is the sum of the inner radius plus the Thickness of tibial gliding component formed.
Weiterhin entspricht der äußere Radius des Zylindermantels dem Radius der Kopplungsfläche zwischen Tibiagleitkomponente und Tibiabasiskomponente. Bei der Implantation kann somit die Tibiagleitkomponente schubladenartig entlang des Radius der Kopplungsfläche der Tibiabasiskomponente in den Gelenkspalt zwischen Femur und Tibia hinein eingeführt werden. Dabei besteht zu keinem Zeitpunkt dieses Implantationsvorganges die Notwendigkeit, den Spalt zwischen Tibiabasiskomponente und Femurkomponente nennenswert aufzuweiten. Eine irreversible Dehnung des Bandapparates beim Einführen der Tibiagleitkomponente wird somit vermieden.Farther corresponds to the outer radius of the cylinder jacket the radius of the coupling surface between Tibiagleitkomponente and tibial base component. During implantation, therefore, the Tibiagleitkomponente Drawer-like along the radius of the coupling surface of the Tibial abdominal component in the joint space between the femur and tibia introduced into it become. There is no time for this implantation process the need to have the gap between tibial base component and femoral component to widen significantly. An irreversible stretch of the ligaments during insertion The Tibiagleitkomponente is thus avoided.
Zweckmäßigerweise sind die Tibiagleitkomponente und die Tibiabasiskomponente über eine an der Tibiagleitkomponente oder der Tibiabasiskomponente eingearbeitete Kopplungsnut in Verbindung mit einer an der jeweils anderen Komponente angeordneten Kopplungsbahn zusammengefügt. Eine solche zweckmäßige Ausgestaltung gewährleistet eine präzise Verbindung der Tibiagleitkomponente mit der Tibiabasiskomponente und sichert eine verschiebungssichere Lagerung von Tibiagleit- und -basiskomponente.Conveniently, For example, the tibial component and the tibial base component are one incorporated into the tibial component or the tibial base component Coupling groove in conjunction with one at the other component arranged coupling track joined together. Such a convenient embodiment guaranteed a precise one Connection of the tibial component with the tibial base component and ensures a shift-proof storage of Tibiagleit- and -basiskomponente.
Weiterhin sind die Tibiagleitkomponente und die Tibiabasiskomponente miteinander gegen Relativbewegung verriegelt, insbesondere verrastet und/oder verschraubt. Dadurch wird eine stabile Lagerung der Tibiagleitkomponente auf der Tibiabasiskomponente erreicht.Farther Both the tibial component and the tibial base component are interrelated locked against relative movement, in particular locked and / or screwed. This will provide stable storage of the tibial component reached on the tibial abase component.
Die
Erfindung soll nachfolgend anhand der
Hierbei zeigen:in this connection demonstrate:
Der
Gleitflächenradius
RG entspricht bei der in
Die
Zylindermantelform der Tibiagleitkomponente
Dabei
vergrößert sich
zu keinem Zeitpunkt nennenswert der Abstand zwischen Femur und Tibia und
der Bandapparat wird somit nicht irreversibel gedehnt. Beginnend
gemäß der Darstellung
nach
- 1010
- TibiagleitkomponenteTibiagleitkomponente
- 2020
- Femurkomponentefemoral component
- 3030
- TibiagleitflächeTibiagleitfläche
- 4040
- TibiabasiskomponenteTibiabasiskomponente
- 5050
- Kopplungsflächecoupling surface
- 6060
- Kopplungsnutcoupling groove
- 7070
- Kopplungsbahncoupling path
- 7575
- femurale Kondylefemoral condyle
- DD
- Dicke der Tibiagleitkomponentethickness the tibial component
- RFRF
- größter Femurradiuslargest femur radius
- RGRG
- GleitflächenradiusGleitflächenradius
- RKRK
- KopplungsflächenradiusCoupling surface radius
Claims (3)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10361780A DE10361780B4 (en) | 2003-10-21 | 2003-12-31 | Tibial plateau component for a knee endoprosthesis |
| EP04024984A EP1525862A3 (en) | 2003-10-21 | 2004-10-20 | Tibial baseplate for a knee endoprothesis. |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10348835.9 | 2003-10-21 | ||
| DE10348835 | 2003-10-21 | ||
| DE10361780A DE10361780B4 (en) | 2003-10-21 | 2003-12-31 | Tibial plateau component for a knee endoprosthesis |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE10361780A1 true DE10361780A1 (en) | 2005-05-25 |
| DE10361780B4 DE10361780B4 (en) | 2008-11-13 |
Family
ID=34484850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE10361780A Expired - Fee Related DE10361780B4 (en) | 2003-10-21 | 2003-12-31 | Tibial plateau component for a knee endoprosthesis |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE10361780B4 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007056141A1 (en) | 2007-11-19 | 2009-06-10 | Ohst Medizintechnik Ag | Tibia insert for use as sliding connector of knee joint sliding surface endoprosthesis, has sliding piece with lateral condyle formed as congruent counter form of distal lateral femur condyle, and medial condyle exhibiting surface regions |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3136636A1 (en) * | 1981-09-16 | 1983-03-31 | Waldemar Link (Gmbh & Co), 2000 Hamburg | Tibial plateau made of plastic with a baseplate of hard material |
| DE3535112A1 (en) * | 1985-10-02 | 1987-04-16 | Witzel Ulrich | TIBI PLATE PART OF A KNEE-KNEE ENDOPROTHESIS |
| DE4011216C1 (en) * | 1990-04-06 | 1991-05-23 | Eska Medical Luebeck Medizintechnik Gmbh & Co, 2400 Luebeck, De | Endo-prothesis esp. for knee joint surgery - has condyle bearing surface detachable from bone-attached baseplate to facilitate future replacement |
| US5358530A (en) * | 1993-03-29 | 1994-10-25 | Zimmer, Inc. | Mobile bearing knee |
| DE69216437T2 (en) * | 1991-02-04 | 1997-04-24 | Walker | Knee joint prosthesis |
| US6004351A (en) * | 1996-09-14 | 1999-12-21 | Mizuho Ika Kogyo Kabushiki Kaisha | Prosthetic knee joint |
-
2003
- 2003-12-31 DE DE10361780A patent/DE10361780B4/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3136636A1 (en) * | 1981-09-16 | 1983-03-31 | Waldemar Link (Gmbh & Co), 2000 Hamburg | Tibial plateau made of plastic with a baseplate of hard material |
| DE3535112A1 (en) * | 1985-10-02 | 1987-04-16 | Witzel Ulrich | TIBI PLATE PART OF A KNEE-KNEE ENDOPROTHESIS |
| DE4011216C1 (en) * | 1990-04-06 | 1991-05-23 | Eska Medical Luebeck Medizintechnik Gmbh & Co, 2400 Luebeck, De | Endo-prothesis esp. for knee joint surgery - has condyle bearing surface detachable from bone-attached baseplate to facilitate future replacement |
| DE69216437T2 (en) * | 1991-02-04 | 1997-04-24 | Walker | Knee joint prosthesis |
| DE69221162T2 (en) * | 1991-02-04 | 1997-11-27 | Walker | Prosthetic knee |
| US5358530A (en) * | 1993-03-29 | 1994-10-25 | Zimmer, Inc. | Mobile bearing knee |
| US6004351A (en) * | 1996-09-14 | 1999-12-21 | Mizuho Ika Kogyo Kabushiki Kaisha | Prosthetic knee joint |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007056141A1 (en) | 2007-11-19 | 2009-06-10 | Ohst Medizintechnik Ag | Tibia insert for use as sliding connector of knee joint sliding surface endoprosthesis, has sliding piece with lateral condyle formed as congruent counter form of distal lateral femur condyle, and medial condyle exhibiting surface regions |
| DE102007056141B4 (en) | 2007-11-19 | 2020-04-23 | Ohst Medizintechnik Ag | Tibia insert |
Also Published As
| Publication number | Publication date |
|---|---|
| DE10361780B4 (en) | 2008-11-13 |
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| OP8 | Request for examination as to paragraph 44 patent law | ||
| 8364 | No opposition during term of opposition | ||
| 8339 | Ceased/non-payment of the annual fee |