| 摘要 |
A prosthetic patello femoral joint includes a patellar and a femoral component designed to replace the articular surfaces of this joint in normal relationship with each other and with the patella and femur thus preserving the normal bio-mechanics of the joint. The patellar component is adapted to be secured to the remaining portion of the patella after resection of sufficient patella to permit the prosthetic surface for articulation to assume a relatively normal position in relationship to the remaining patella. The femoral component is adapted to be secured within a resection of the femur of sufficient width and depth to permit its insertion with its articulating surface as a replacement for the diseased surface in normal relationship with the remainder of the femur. The patellar component includes a slightly convex surface much smaller than but conforming to the concavity of the femoral conponent for the purpose of distributing the compressive forces evenly. The femoral component surface conforms to the slightly concave surface of the normal femur and is much wider than the patellar component, permitting the patella to move from side to side at will in it longitudinal progression.
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