作者研究从口外向后牵引下颌时颞颌关节的变化,用29只小狗(8～3.5月,开始换牙)作实验,其中有21只用颏兜向后牵引下颌,每侧牵引力450g.分7组,每组3只,分别在牵引3,7,15,30,60和90天以及停止牵引以后45天杀死动物,取出颞颌关节标本,福尔马林固定,脱钙,火棉胶包埋,制切片,(厚20～25μm),苏木紫和伊红染色,光镜检查。其余8只作为对照组。 The authors studied the changes in the temporomandibular joint when the mandibular was distracted from the mouth and used 29 puppies (8-3.5 months) to start the experiment. Among them, 21 had a chinchip to pull the mandibular backwards and each side had a traction of 450g 7 groups, 3 rats in each group. The animals were sacrificed 45 days after being pulled for 3, 7, 15, 30, 60 and 90 days respectively and the traction was stopped. The specimens of temporomandibular joint were removed, formalin fixed, decalcified, Plastic embedding, slicing, (thickness 20 ~ 25μm), hematoxylin and eosin staining, light microscopy. The remaining 8 as a control group.