×

Prosthetic implant

  • US 5,755,803 A
  • Filed: 05/17/1996
  • Issued: 05/26/1998
  • Est. Priority Date: 09/02/1994
  • Status: Expired due to Term
First Claim
Patent Images

1. A prosthetic implant for attachment to a resected femur for total knee arthroplasty comprising:

  • an outer bearing surface having medial and lateral condyles formed thereon,said medial and lateral condyles being of three dimensionally curved convex geometry to serve an articular function;

    said medial and lateral condyles interconnected by a patellar groove, said patellar groove being of a three dimensionally curved concave geometry;

    an inner contact surface in back to back disposition with said outer bearing surface, said inner contact surface including inner medial and lateral condylar areas corresponding to the medial and lateral condyles formed on the outer bearing surface,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;

    said inner contact surface geometry further defined as a surface of revolution generated by sweeping a continuous non-collinear medio-lateral profile about a curved anterior-posterior path;

    said medio-lateral profile and said anterior-posterior path being planar geometries in orthogonal relation to each other; 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 all claims
  • 3 Assignments
Timeline View
Assignment View
    ×
    ×