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Chondromalacic changes of the patella in rabbits.

Malalignments of the patellofemoral joints were artificially made in eleven rabbits using four different methods in order to generate chondromalacia of the patella. Chondromalacic changes and the location similar to the chondromalacia of the human body were generated in one joint of the patching group. According to the results of our investigation, the most reasonable etiological factor of the chondromalacia is thought to be the expansion of the medial retinaculum and capsule of the knee joint, and chondromalacia patellae may not be a precursor of osteoarthritic changes.