Figure 1.

(a) The femoral head was extracted and split in half, and the necrotic bone around the center of the femoral head (circle) was harvested. (b) Compared with the control group, the trauma, steroid, and alcohol groups all showed increased numbers of adipocytes and decreased trabecular bone (black arrows) in the H&E sections (100x). (c) The BV/TV of femoral heads in the osteonecrotic groups all showed significant decreases compared with those in the control group. (Data are presented as mean ± SD; t test, ^∗P < 0.05, compared with the control group; BV/TV, bone volume/total volume.)