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Histopathologic characteristic of hip joint tissues in mechanical trauma

The effects of dosed-force shock on the femoral head and greater trochanter were studied in 24 rabbits. Histologic specimens were analyzed 3, 7, 14, 30 days and 3, 6, 9 months after trauma. Mechanical damage of articular cartilage of the femoral head and acetabulum was detected. That damage was combined with the necrosis of cartilaginous tissue and microfractures of spongy bone of the femoral head. Repair of the damaged cartilage was of abortive pattern and did not provide filling of the defect with hyaline cartilage.