Methods 24 Wister male rats were randomly averagely divided into 4 groups. The right maxillary and mandibular molars of rats in experimental group were extracted to make unilateral mastication.

• 方法 2 4只Wister大鼠随机均分为 4组 ,拔除实验组动物右侧上、下颌磨牙 ,人为造成偏侧咀嚼 ,1个月和三个月后 ,取三叉神经节 ,分别进行免疫组化和原位杂交反应。