IMPLANTS FOR PARTIAL KNEE ARTHROPLASTY
First Claim
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1. An apparatus to partially replace articulating surfaces of a knee joint, the apparatus comprising:
- a femoral implant including an outer bearing surface and an inner surface structured for attachment to the femur, said femoral implant comprising a single component that resurfaces the femoral trochlea and one femoral condyle, said single component structured to extend from the top of the patellofemoral groove and over one femoral condyle; and
a tibial implant including an outer bearing surface structured to mimic and replace one plateau of a proximal tibia, said tibial implant positionable adjacent to said femoral implant; and
a patellar implant including an outer bearing surface structured to mimic and replace a portion of the posterior surface of a patella, said patellar implant positionable adjacent to said femoral implant,wherein the outer bearing surface of said femoral implant is structured to contact said tibial implant and said patellar implant and further wherein the resulting configuration of the femoral implant and the tibial implant and the patellar implant articulate in a predetermined manner to restore proper kinematics.
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Abstract
The present invention provides a method and device for restoring individual patient joint kinematic using minimally invasive surgical procedures. The instrumentation of the invention sculpts the articular surface of a first bone that normally articulates in a predetermined manner with a second bone. The implant system is comprised of implants that provide intraoperative surgical options for articular constraint and facilitate proper alignment and orientation of the joint to restore kinematics as defined by the individual patient anatomy.
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Citations
26 Claims
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1. An apparatus to partially replace articulating surfaces of a knee joint, the apparatus comprising:
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a femoral implant including an outer bearing surface and an inner surface structured for attachment to the femur, said femoral implant comprising a single component that resurfaces the femoral trochlea and one femoral condyle, said single component structured to extend from the top of the patellofemoral groove and over one femoral condyle; and a tibial implant including an outer bearing surface structured to mimic and replace one plateau of a proximal tibia, said tibial implant positionable adjacent to said femoral implant; and a patellar implant including an outer bearing surface structured to mimic and replace a portion of the posterior surface of a patella, said patellar implant positionable adjacent to said femoral implant, wherein the outer bearing surface of said femoral implant is structured to contact said tibial implant and said patellar implant and further wherein the resulting configuration of the femoral implant and the tibial implant and the patellar implant articulate in a predetermined manner to restore proper kinematics. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An apparatus to partially replace articulating surfaces of a knee joint, the apparatus comprising:
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a femoral implant including an outer bearing surface and an inner surface structured for attachment to the femur, said femoral implant comprising a single component that resurfaces the femoral trochlea and one femoral condyle, said single component structured to extend from the top of the patellofemoral groove and over one femoral condyle; and a patellar implant including an outer bearing surface structured to mimic and replace a portion of the posterior surface of a patella, said patellar implant positionable adjacent to said femoral implant, wherein the outer bearing surface of said femoral implant is structured to contact said patellar implant and further wherein the resulting configuration of the femoral implant and patellar implant articulate in a predetermined mariner to restore proper kinematics. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A system to partially replace articulating surfaces of a knee joint, the system comprising:
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a set of femoral implants of various sizes, each of said femoral implants including an outer bearing surface and an inner surface structured for attachment to the femur, each of said femoral implants comprising a single piece structured to extend from the top of the patellofemoral groove and over one femoral condyle; a set of tibial implants of various sizes, each of said tibial implants including an outer bearing surface structured to mimic and replace one plateau of a proximal tibia, each of said tibial implants positionable adjacent to one of said femoral implants; and a set of patellar implants of various sizes, each of said patellar implants including an outer bearing surface structured to mimic and replace a portion of the posterior surface of a patella, each of said patellar implants positionable adjacent to one of said femoral implants, wherein the outer bearing surface of one of said femoral implants is structured to contact one of said tibial implants and one of said patellar implants and further wherein the resulting configuration of the femoral implant, tibial implant and patellar implant articulate in a predetermined manner to restore proper kinematics. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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22. A system to partially replace articulating surfaces of a knee joint, the system comprising:
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a set of femoral implants of various sizes, each of said femoral implants including an outer bearing surface and an inner surface structured for attachment to the femur, each of said femoral implants comprising a single piece structured to extend from the top of the patellofemoral groove and over one femoral condyle; and a set of patellar implants of various sizes, each of said patellar implants including an outer bearing surface structured to mimic and replace a portion of the posterior surface of a patella, each of said patellar implants positionable adjacent to one of said femoral implants, wherein the outer bearing surface of one of said femoral implants is structured to contact one of said patellar implants and further wherein the resulting configuration of the femoral implant and patellar implant articulate in a predetermined manner to restore proper kinematics. - View Dependent Claims (23, 24, 25, 26)
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Specification