Invention Grant
- Patent Title: Natural alignment knee instruments
- Patent Title (中): 自然对齐膝盖仪器
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Application No.: US13113414Application Date: 2011-05-23
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Publication No.: US08974459B1Publication Date: 2015-03-10
- Inventor: Stuart L. Axelson, Jr. , Mohamed Soliman , Michael C. Ferko , Robert F. Simes, Jr. , James H. Howell
- Applicant: Stuart L. Axelson, Jr. , Mohamed Soliman , Michael C. Ferko , Robert F. Simes, Jr. , James H. Howell
- Applicant Address: US NJ Mahwah
- Assignee: Howmedica Osteonics Corp.
- Current Assignee: Howmedica Osteonics Corp.
- Current Assignee Address: US NJ Mahwah
- Agency: Lerner, David, Littenberg, Krumholz & Mentlik, LLP
- Main IPC: A61B17/56
- IPC: A61B17/56 ; A61B17/15

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.
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