Hydroprednisone acetate was injected into the rabbits of the model group using intragluteal injection to produce necrosis models of bone cells of femoral head.

模型组采用臀肌注射醋酸氢化泼尼松(简称激素)建细胞坏死模型。

The primary etiology of avascular necrosis of the femoral head (AVN) appears to be circulating microemboli that block the microcirculation of the femoral head.

主要病因缺血性坏死（结）似乎是微循环，阻止微循环的。