( 4 ) specimens of the 10 femoral heads from patients suffering from osteonecrosis and osteoarthritis were studied histologically to observe the pathological changes of avascular necrosis of bone and the apoptosis of cartilage cells ( 4 )取缺血坏死型股骨头和骨关节炎股骨头常规作病理切片和细胞凋亡实验,观察其变化。