Knee joint prosthesis system and method for implantation
First Claim
1. A prosthesis system for replacing a knee joint between a femur and a tibia, the prosthesis comprising:
- a first femoral component including a first condylar portion, a second condylar portion, a first sidewall extending superiorly from the first condylar portion, a second sidewall offset from the first sidewall a first distance and extending superiorly from the second condylar portion;
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 surface and a superior femoral engaging surface, the bearing defining an opening and a bearing keyway;
a first yoke and a second yoke each having an inferior portion, a superior portion and a yoke keyway extending therethrough, the superior portion of the first yoke having an axle assembly that expands along its axis, the superior portion of the second yoke cooperating with a solid axle that spans a second distance greater than the first distance;
a first key that is removably inserted into the first yoke keyway and the bearing keyway and interfaces with the axle assembly; and
a second key that is removably inserted into the second yoke keyway and the bearing keyway and interfaces with the solid axle;
wherein the first or second yoke is selectively and alternatively connected between the first femoral component and the bearing in an assembled position;
wherein the axle assembly includes a pair of axle posts that expand outward towards the first and the second sidewalls of the first femoral component upon advancement of the first key into the yoke keyway.
3 Assignments
0 Petitions
Accused Products
Abstract
A prosthesis system for replacing a knee joint between a femur and a tibia can include a first femoral component including a first condylar portion, a second condylar portion, a first sidewall extending superiorly from the first condylar portion and a second sidewall offset from the first sidewall a first distance and extending superiorly from the second condylar portion. A tibial component can have a bone engaging inferior surface and a bearing engaging superior surface. A bearing can have an inferior surface that engages the bearing engaging surface and a superior femoral engaging surface. The bearing can define an opening and a bearing keyway. A first yoke and a second yoke can each have an inferior portion, a superior portion, and a yoke keyway extending therethrough.
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Citations
17 Claims
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1. A prosthesis system for replacing a knee joint between a femur and a tibia, the prosthesis comprising:
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a first femoral component including a first condylar portion, a second condylar portion, a first sidewall extending superiorly from the first condylar portion, a second sidewall offset from the first sidewall a first distance and extending superiorly from the second condylar portion; 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 surface and a superior femoral engaging surface, the bearing defining an opening and a bearing keyway; a first yoke and a second yoke each having an inferior portion, a superior portion and a yoke keyway extending therethrough, the superior portion of the first yoke having an axle assembly that expands along its axis, the superior portion of the second yoke cooperating with a solid axle that spans a second distance greater than the first distance; a first key that is removably inserted into the first yoke keyway and the bearing keyway and interfaces with the axle assembly; and a second key that is removably inserted into the second yoke keyway and the bearing keyway and interfaces with the solid axle; wherein the first or second yoke is selectively and alternatively connected between the first femoral component and the bearing in an assembled position; wherein the axle assembly includes a pair of axle posts that expand outward towards the first and the second sidewalls of the first femoral component upon advancement of the first key into the yoke keyway. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A prosthesis system for replacing a knee joint between a femur and a tibia, the prosthesis comprising:
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a first femoral component including a first condylar portion, a second condylar portion, a first sidewall extending superiorly from the first condylar portion, a second sidewall offset from the first sidewall a first distance and extending superiorly from the second condylar portion; 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 surface and a superior femoral engaging surface, the bearing defining an opening and a bearing keyway; a first yoke having a first yoke keyway extending therethrough, the first yoke having an axle assembly that expands along its axis; a second yoke having a second yoke keyway extending therethrough, the second yoke cooperating with a solid axle; a first key that is removably inserted into the first yoke keyway and the bearing keyway and interfaces with the axle assembly; and a second key that is removably inserted into the second yoke keyway and the bearing keyway and interfaces with the solid axle; wherein the first or second yoke is selectively and alternatively connected between the femoral component and the bearing in an assembled position; wherein the axle assembly includes a pair of axle posts that expand outward towards the first and the second sidewalls of the first femoral component upon advancement of the first key into the yoke keyway. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A prosthesis system for replacing a knee joint between a femur and a tibia, the prosthesis comprising:
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a first femoral component including a first condylar portion, a second condylar portion, a first pair of closed sidewalls extending superiorly from the first and second condylar portions, respectively; a second femoral component having a second pair of open sidewalls; 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 surface and a superior femoral engaging surface, the bearing defining an opening and a bearing keyway; a first yoke having a first yoke keyway extending therethrough, the first yoke having an axle assembly that expands along its axis; a second yoke having a second yoke keyway extending therethrough, the second yoke cooperating with a solid axle; a third yoke having a third yoke keyway, the third yoke configured to position between the first pair of closed sidewalls; a first key that is removably inserted into the first yoke keyway and the bearing keyway and interfaces with the axle assembly; and a second key that is removably inserted into the second yoke keyway and the bearing keyway and interfaces with the solid axle; wherein the first, second or third yoke is selectively and alternatively connected between a selected first or second femoral component and the bearing in an assembled position; wherein the axle assembly includes a pair of axle posts that expand outward towards the first and the second sidewalls of the first femoral component upon advancement of the first key into the yoke keyway.
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Specification