Abstract
Preoperative evaluation consists of a series of radiographs and a careful analysis of the gait in order to estimate the amount of bone resection and soft-tissue release needed for successful arthroplasty. Graduated, surgical soft-tissue releases were used for realigning arthritic knees during arthroplasty. Medial, lateral, anterior, and posterior releases provide step-by-step correction for realigning markedly deformed joints. The procedure prevents "over-releasing" leading to ligamentous instability. At surgery the mechanical axis of the limb was used for knee realignment by use of a towel clip over the hip joint and palpation of the malleoli at the ankle; the center of the hip, knee, and ankle should be in a straight line. Elimination of abnormal moment (the tendency to produce motion about the normal axis) at the knee with weight-bearing was the goal for realignment. Proper alignment is the key to success and longevity in knee arthroplasty. Soft-tissue releases should be used with any type of instrumentation the surgeon desires. The patella must also be realigned.
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