Prosthetic implant
First Claim
1. A prosthetic implant for attachment to a resected femur for total knee arthroplasty comprising:
- an outer bearing surface having a three dimensionally curved geometry and including a patellar groove;
an inner contact surface having a three dimensionally curved geometry, said geometry curved along a medio-lateral direction and an anterior-posterior direction;
said inner contact surface including an inner patellar groove area, said inner patellar groove area being of a three dimensionally curved geometry, said geometry curved along a medio-lateral direction and an anterior posterior direction; and
said inner contact surface geometrically corresponding to a geometry of a resected femur having a three dimensionally curved geometry, for full contact and attachment of said inner contact surface with a resected femur.
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Accused Products
Abstract
An implant is provided for which has an outer bearing surface and an inner attachment surface. The outer bearing surface functions as ajoint contact surface for a reconstructed bone joint. The inner attachment surface contacts a bone and is attached thereto. The inner attachment surface of the implant is curvilinear from the anterior to the posterior area of the femur, and is also curvilinear from the medial to the lateral areas of the femur to approximates the shape of natural femur. The resection of the femur for accommodating the implant can be properly performed by a milling device employing one or more curvilinear milling bits.
550 Citations
16 Claims
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1. A prosthetic implant for attachment to a resected femur for total knee arthroplasty comprising:
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an outer bearing surface having a three dimensionally curved geometry and including a patellar groove;
an inner contact surface having a three dimensionally curved geometry, said geometry curved along a medio-lateral direction and an anterior-posterior direction;
said inner contact surface including an inner patellar groove area, said inner patellar groove area being of a three dimensionally curved geometry, said geometry curved along a medio-lateral direction and an anterior posterior direction; and
said inner contact surface geometrically corresponding to a geometry of a resected femur having a three dimensionally curved geometry, for full contact and attachment of said inner contact surface with a resected femur. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A prosthetic implant for attachment to a resected bone comprising:
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an outer bearing surface;
an inner contact surface including inner medial and lateral condylar areas;
each of said inner medial and lateral condylar areas being of a three dimensionally curved concave geometry, said concave geometry curved along a medio-lateral direction and an anterior-posterior direction;
each of said inner medial and lateral condyle areas interconnected by an inner patellar groove area, said inner patellar groove area being of a three dimensionally curved convex geometry, said convex geometry curved along a medio-lateral direction and an anterior posterior direction; and
said inner contact surface geometrically corresponding to a geometry of a resected femur having a three dimensionally curved convex medial and lateral condylar geometry, and a three dimensionally curved concave patellar groove geometry, for full contact and attachment of said inner contact surface with a resected femur. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification