Natural alignment knee instruments
First Claim
1. A tibial resection guide assembly, comprising:
- an elongate rod;
a tibial resection guide adjustably mounted to the elongate rod and having a resection guide surface; and
a femoral referencing member adjustably mounted to the elongate rod, and having a proximal facing surface for contacting a distal femur and a distal facing convexly shaped surface for contacting respective tibial condyles of a proximal tibia, the proximal facing surface including first and second peg members extending therefrom for receipt within respective openings in the distal femur.
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Accused Products
Abstract
A method for aligning an orthopedic implant in a joint replacement includes determining the bone and cartilage deficiency from an undegenerated state caused by wear of a joint. Then a resection of a bone in the joint is made based on the deficiency of bone and cartilage from the undegenerated state and the size of a joint implant so as to locate the joint surface of the implant in the undegenerated cartilage location. The condylar wear from the undegenerated states may be assessed at a distal and posterior location on each of a medial and a lateral femoral condyle. A distal cut is made on the femur at a location adjusting for the condylar wear from the undegenerated state. The distal cut varus-valgus angle is oriented parallel to a plane across the distal femur after adjusting for wear in the distal location on the medial and lateral condyle.
132 Citations
18 Claims
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1. A tibial resection guide assembly, comprising:
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an elongate rod; a tibial resection guide adjustably mounted to the elongate rod and having a resection guide surface; and a femoral referencing member adjustably mounted to the elongate rod, and having a proximal facing surface for contacting a distal femur and a distal facing convexly shaped surface for contacting respective tibial condyles of a proximal tibia, the proximal facing surface including first and second peg members extending therefrom for receipt within respective openings in the distal femur. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A tibial resection guide assembly, comprising:
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an elongate rod; a tibial resection guide mounted to the elongate rod between first and second ends thereof and having a resection guide surface; and a referencing member slidably mounted to the first end of the elongate rod, the referencing member having a proximal facing surface for contacting a distal femur and a distal facing surface having a first convex portion for contacting a proximal tibia, the proximal facing surface having a plurality of projections extending therefrom for receipt in respective openings within the distal femur. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A tibial resection guide assembly, comprising:
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an elongate rod; a tibial resection guide adjustably mounted to the elongate rod and having a resection guide surface; and a referencing member having a body adjustably mounted to the elongate rod, the body having a proximal surface and a distal convex surface defining a thickness of the referencing member, wherein the proximal surface is planar and includes a peg member extending therefrom for receipt within an opening of a distal femur. - View Dependent Claims (16, 17, 18)
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Specification