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最近认为本病是一种退行性变,但对其病因仍有争论。Blackwood(1963,1966)在530个尸体中作过组织学、组织化学及显微射线学研究,发现在40岁以上的,40%有本病,但在临床上不一定出现。标本上的病变最初出现在髁
Recently, the disease is considered a degenerative change, but its cause is still controversial. Blackwood (1963, 1966) performed histological, histochemical and micro-ray studies in 530 bodies and found that 40% of patients over the age of 40 had this disease but not clinically. The lesions on the specimen first appeared on the condyle