In studying cellular ultrastructure and microvascular density of the femoral head necrosis models, the slides were made after vascular infusion with Chinese ink on 4th, 8th, and 12th week of the experiment.

• 实验组每周皮下注射醋酸氢化泼尼松8mg/kg；对照组每周皮下注射生理盐水0.；32ml/kg。 在实验的第4、8和12周分别对实验组和对照组的股骨头行微血管墨汁灌注；研究股骨头MVD的变化;