Knee joint prosthesis system and method for implantation
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
A61F-002/38
A61F-002/30
출원번호
US-0796440
(2013-03-12)
등록번호
US-8936648
(2015-01-20)
발명자
/ 주소
Collard, Curt
Collins, Michael John
Metzger, Robert
May, Brian M.
Ryan, Larabeth G.
출원인 / 주소
Biomet Manufacturing, LLC
대리인 / 주소
Harness, Dickey
인용정보
피인용 횟수 :
2인용 특허 :
661
초록▼
A prosthesis for replacing a knee joint between a femur and a tibia can include a femoral component, a tibial component, a bearing and a yoke assembly. The yoke assembly can have a yoke disposed between the bearing and the femoral component and an axle having an axle axis. The axle can hingedly coup
A prosthesis for replacing a knee joint between a femur and a tibia can include a femoral component, a tibial component, a bearing and a yoke assembly. The yoke assembly can have a yoke disposed between the bearing and the femoral component and an axle having an axle axis. The axle can hingedly couple the yoke with the femoral component. Rotation of the femoral component about a rotation axis that is perpendicular to the axle axis causes concurrent rotation of the yoke about the rotation axis.
대표청구항▼
1. A prosthesis for replacing a knee joint between a femur and a tibia, the prosthesis comprising: a femoral component including a first condylar portion, a second condylar portion and an intercondylar portion having a first sidewall and a second sidewall;a tibial component having a bone engaging in
1. A prosthesis for replacing a knee joint between a femur and a tibia, the prosthesis comprising: a femoral component including a first condylar portion, a second condylar portion and an intercondylar portion having a first sidewall and a second sidewall;a tibial component having a bone engaging inferior surface and a bearing engaging superior surface;a bearing having an inferior surface that engages the bearing engaging superior surface of the tibial component and a superior femoral engaging surface, the bearing defines a pocket; anda yoke assembly having a yoke base seated in the pocket and a yoke disposed between the bearing and the femoral component, cooperation between the yoke base and the pocket restricts rotation of the yoke assembly relative to the bearing; andan axle having an axle axis and that hingedly couples the yoke with the femoral component;wherein rotation of the femoral component about a rotation axis that is perpendicular to the axle axis causes concurrent rotation of the yoke about the rotation axis while the first and second condylar portions rotate along the superior femoral engaging surface of the bearing. 2. The prosthesis system of claim 1 wherein rotation of the bearing is limited to a fixed angle of rotation. 3. The prosthesis system of claim 2 wherein the fixed angle is substantially twenty degrees. 4. The prosthesis system of claim 2 wherein the bearing defines at least one wall at the pocket. 5. The prosthesis of claim 1, wherein the yoke base defines a passage configured to receive a fastener therethrough for coupling the yoke and the bearing to the tibial component, a pin passage, and an axle passage configured to receive the axle therethrough. 6. The prosthesis of claim 5, further comprising a hyperextension stop including a pin configured for receipt in the pin passage to retain the hyperextension stop between the femoral component and the yoke base. 7. A prosthesis for replacing a knee joint between a femur and a tibia, the prosthesis comprising: a femoral component including a first condylar portion, a second condylar portion and an intercondylar portion having a first sidewall and a second sidewall;a tibial component having a bone engaging inferior surface and a bearing engaging superior surface;a bearing having an inferior surface that engages the bearing engaging superior surface of the tibial component and a superior femoral engaging surface, the bearing further having sidewalls that define a pocket on the superior femoral engaging surface; anda yoke assembly having a yoke disposed between the bearing and the femoral component and an axle having an axle axis and that hingedly couples the yoke with the femoral component, a portion of the yoke assembly is seated within the pocket such that the yoke is bound by the sidewalls defining the pocket and rotation of the yoke assembly is restricted by the sidewalls;wherein rotation of the femoral component about a rotation axis that is perpendicular to the axle axis causes concurrent rotation of the yoke and the bearing about the rotation axis while the first and second condylar portions rotate along the superior femoral engaging surface of the bearing. 8. The prosthesis of claim 7 wherein rotation of the yoke around the rotation axis is limited to a fixed angle of rotation. 9. The prosthesis of claim 8 wherein the fixed angle is substantially twenty degrees. 10. The prosthesis of claim 7, wherein the yoke assembly further comprises a yoke base defining a passage configured to receive a fastener therethrough for coupling the yoke and the bearing to the tibial component, a pin passage, and an axle passage configured to receive the axle therethrough. 11. The prosthesis of claim 10, further comprising a hyperextension stop including a pin configured for receipt in the pin passage to retain the hyperextension stop between the femoral component and the yoke base. 12. The prosthesis of claim 11, wherein the pin is configured for receipt in a groove of the axle to retain the axle in the axle passage. 13. A prosthesis for replacing a knee joint between a femur and a tibia, the prosthesis comprising: a femoral component including a first condylar portion, a second condylar portion and an intercondylar portion having a first sidewall and a second sidewall;a tibial component having a bone engaging inferior surface and a bearing engaging superior surface;a bearing having an inferior surface that fixedly engages the bearing engaging superior surface of the tibial component and a superior femoral engaging surface, the bearing including sidewalls defining a pocket;a yoke assembly including, a yoke base nestingly seated within the pocket such that rotation of the yoke assembly is restricted by the sidewalls, a yoke, a fastener, and an axle having an axle axis, the yoke comprising a yoke base defining a passage configured to receive the fastener therethrough, an axle passage configured to receive the axle for rotation about the axle axis, and a pin passage extending generally perpendicular to the axle passage; anda hyperextension stop disposed between the femoral component and the yoke, the hyperextension stop includes a pin configured to extend into the pin passage and couple the hyperextension stop to the yoke;wherein the yoke and yoke base are configured to collectively rotate about a rotation axis that is perpendicular to the axle axis relative to the tibial component, and cooperation between the yoke base and the sidewalls of the pocket prevents independent rotation of the yoke assembly relative to the bearing.
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이 특허에 인용된 특허 (661)
Albert Burstein ; C. Michael Mauldin ; Gary J. Miller, Acetabular bearing assembly for total hip joints.
Adrey Jos (43 ; Faubourg St. Jaumes 34000 Montpellier FRX) Berteaux Daniel (64bis ; rue des Fosss 45400 Fleury les Aubrais FRX) Goalard Christian (43 ; Faubourg St. Jaumes 34000 Montpellier FRX) Guer, Acetabular cup assembly.
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