Abstract
The investigation reported in this paper is concerned with an experimental and theoretical study conducted to explain the changes of the knee joint mechanics in degenerative joint disease. The major thrust of the study is to determine the resultants of the pressure distribution on both lateral and medial plateaus in normal and abnormal knee joint configurations. Up to 5° of varus and valgus deformity is applied to a normal femorotibial angle of a strain-gaged test specimen which is connected through the femur and the tibia to the jaws of a specially designed loading apparatus. Strains are obtained for various loads and deviated femorotibial angles from the strain gages implanted on the femur and the tibia. Utilization of these strains as data for a three-dimensional theoretical analysis yielded the following results for the normal and abnormal knee joint configurations: (a) contact forces on both lateral and medial plateaus; (b) medial and lateral collateral ligament forces; (c) anteroposterior and lateral-medial moments.
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