Methods: The experimental rats included the young and aged.Potassium penicillin G, sodium penicillin G, benzyl alcohol and normal saline were injected to observe gluteal muscular fibrosis.

• 方法选择幼龄和成年大白鼠作为实验对象,分别用青霉素钠盐和钾盐溶液进行臀肌注射,同时设置单纯生理盐水组和单纯苯甲醇组,于20天处死动物,取臀肌作病理切片观察。