DE10361780B4 - Tibial plateau component for a knee endoprosthesis - Google Patents
Tibial plateau component for a knee endoprosthesis Download PDFInfo
- Publication number
- DE10361780B4 DE10361780B4 DE10361780A DE10361780A DE10361780B4 DE 10361780 B4 DE10361780 B4 DE 10361780B4 DE 10361780 A DE10361780 A DE 10361780A DE 10361780 A DE10361780 A DE 10361780A DE 10361780 B4 DE10361780 B4 DE 10361780B4
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- component
- tibial
- coupling
- radius
- sliding
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- 210000003127 knee Anatomy 0.000 title claims abstract description 13
- 230000008878 coupling Effects 0.000 claims abstract description 29
- 238000010168 coupling process Methods 0.000 claims abstract description 29
- 238000005859 coupling reaction Methods 0.000 claims abstract description 29
- 210000002303 tibia Anatomy 0.000 claims abstract description 13
- 210000000689 upper leg Anatomy 0.000 claims abstract description 8
- 230000003187 abdominal effect Effects 0.000 abstract description 5
- 229920003023 plastic Polymers 0.000 description 17
- 239000004033 plastic Substances 0.000 description 17
- 210000000629 knee joint Anatomy 0.000 description 8
- 210000000988 bone and bone Anatomy 0.000 description 4
- 238000002513 implantation Methods 0.000 description 4
- 210000003041 ligament Anatomy 0.000 description 4
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 230000002427 irreversible effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
- 230000008733 trauma Effects 0.000 description 1
Classifications
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- 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
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- 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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- 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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- 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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- 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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- 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
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- 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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- 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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- 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
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- 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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- 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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- 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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- 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)
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- Veterinary Medicine (AREA)
- Prostheses (AREA)
Abstract
Tibiaplateaukomponente
für eine Knieendoprothese,
umfassend eine Tibiagleitkomponente (10) mit einer mit einer Femurkomponente
(20) in gleitendem Kontakt stehenden Tibiagleitfläche (30)
und eine in der Tibia verankerte, die Tibiagleitkomponente tragende
Tibiabasiskomponente (40), wobei
– die Tibiagleitfläche (30)
mindestens entlang eines Sagittalebenenschnittes eine Form eines
Zylindermantelausschnittes aufweist, wobei der Gleitflächenradius
(RG) des Zylindermantelabschnittes gleich oder größer dem
größten Femurradius
(RF) der Femurkomponente (20) ist und
– eine Kopplungsfläche (50)
zwischen der Tibiagleitkomponente (10) und der Tibiabasiskomponente
(40) die Form eines Zylindermantelabschnittes hat und einen Kopplungsflächenradius
(RK) aufweist, dessen Größe mindestens gleich
der Größe des um
den Betrag der mittleren Dicke (D) der Tibiagleitkomponente erhöhten Gleitflächenradius
(RG) ist,
– die
Tibiagleitkomponente (10) und die Tibiabasiskomponente (40) über eine
an der Tibiagleitkomponente oder der Tibiabasiskomponente eingearbeitete
Kopplungsnut (60) in Verbindung mit an einer der jeweils anderen
Komponente befindlichen Kopplungsbahn (70) schubladenartig in den Spalt
zwischen Femur und Tibia eingeführt
ist, wobei...A tibial plateau component for a knee endoprosthesis comprising a tibial component (10) having a tibial guide surface (30) in sliding contact with a femoral component (20) and a tibial base component (40) anchored in the tibia and carrying the tibial component
- The Tibiagleitfläche (30) has at least along a Sagittalebenenschnittes a shape of a cylinder jacket cutout, wherein the Gleitflächenradius (RG) of the cylinder barrel portion is equal to or greater than the largest femur radius (RF) of the femoral component (20) and
- A coupling surface (50) between the Tibiagleitkomponente (10) and the Tibiabasiskomponente (40) has the shape of a cylinder jacket portion and a coupling surface radius (RK), the size of which increased at least equal to the size of the amount of the mean thickness (D) of Tibiagleitkomponente Sliding surface radius (RG) is,
The tibial guide component (10) and the tibial base component (40) are inserted into the gap between the femur and the tibia in a drawer-like manner via a coupling groove (60) incorporated in the tibial guide component or the tibial abdominal component in conjunction with a coupling track (70) located on one of the other components, in which...
Description
Die Erfindung betrifft eine Tibiaplateaukomponente für eine Knieendoprothese, umfassend eine Tibiagleitkomponente mit einer Tibiagleitfläche, die in gleitendem Kontakt mit einer Femurkomponente steht und eine in der Tibia verankerte, die Tibiagleitkomponente tragende Tibiabasiskomponente.The The invention relates to a tibial plateau component for a knee endoprosthesis comprising a tibial component having a tibial sliding surface in sliding contact with a femoral component and one anchored in the tibia, the tibial component bearing tibial base component.
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 Tibiabasiskomponente 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 base 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
Die
Lehre nach
Bei Einbringung der Tibiagleitkomponente während eines operativen Eingriffes müssen die Fermur- und Tibiabasiskomponente zeitweilig gespreizt werden, um die Gleitkomponente in den gewünschten Pressitz zu bringen.at Introduction of the tibial component during surgery have to the Fermur and Tibiabasis components are temporarily spread, to bring the sliding component into the desired interference fit.
In
der Patentschrift
Eine
weitere Ausführungsform
einer tibialen Komponente einer Knieprothese wird in der
Die
Lehre nach
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 Patentanspruchs gelöst.The The object is a tibial plateau component for a knee endoprosthesis according to the features of the claim.
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 Tibiagleitfläche, which is in sliding contact with a femoral component and a anchored in the tibia, the Tibiagleitkomponente bearing tibial base component and is characterized according to the invention by that the tibial guide surface at least along a sagittal plane section the shape of a Zylindermantelausschnittes, wherein the Gleitflächenradius of the cylinder barrel portion equal to or larger than the largest radius of the femoral component is. In conjunction with this, the tibial plateau component continues characterized in that the coupling surface between the Tibiagleitkomponente and the tibial base component takes the form of a cylinder barrel portion has and a coupling surface radius whose size is at least equal to the size of the order the amount of the mean thickness of the tibial component increased sliding surface radius is.
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. H. 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.
Zudem 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 schubladenartig in den Spalt zwischen Femur und Tibia eingeführt, wobei die Tibiagleitkomponente und die Tibiabasiskomponente im verbundenen Zustand miteinander durch eine Schnappkontur verrastet sind. Diese Anordnung gewährleistet eine präzise Verbindung der Tibiagleitkomponente mit der Tibiabasiskomponente und sichert eine verschiebungssichere Lagerung von Tibiagleit- und -basiskomponente.moreover 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 path like a drawer in the gap between Introduced femur and tibia, wherein the tibial-agglomerating component and the tibial base component in the connected Condition are locked together by a snap contour. These Arrangement guaranteed a precise one Connection of the tibial component with the tibial base component and ensures a shift-proof storage of Tibiagleit- and -basiskomponente.
Das Verrasten mittels einer Schnappkontur und/oder Verschrauben, verriegelt die Tibiagleitkomponente und die Tibiabasiskomponente miteinander gegen eine Relativbewegung. Dadurch wird eine stabile Lagerung der Tibiagleitkomponente auf der Tibiabasiskomponente erreicht.The Locking by means of a snap contour and / or screwing, locked the tibial component and the tibial base component against each other a relative movement. 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
Da
die Dicke der Tibiagleitkomponente
Die
Zylindermantelform der Tibiagleitkomponente
- 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 (1)
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 DE10361780A1 (en) | 2005-05-25 |
| DE10361780B4 true DE10361780B4 (en) | 2008-11-13 |
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ID=34484850
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| 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 |
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| Country | Link |
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| DE (1) | DE10361780B4 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007056141B4 (en) | 2007-11-19 | 2020-04-23 | Ohst Medizintechnik Ag | Tibia insert |
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 |
Also Published As
| Publication number | Publication date |
|---|---|
| DE10361780A1 (en) | 2005-05-25 |
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| 8364 | No opposition during term of opposition | ||
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