摘要
目的 :改进颞下颌关节盘前移位动物模型的方法。方法 :手术暴露 8只兔右侧的颧突根部、眶下壁和眶后壁处组织 ,在颧突根部的前下方 ,用带有弹力橡皮筋的针自下向上垂直穿过关节盘的前伸部 ,将双股弹力橡皮筋从 7mm向前牵引至 16mm ,达 0 78N的牵引力 ,并将其固定于在颧弓上制备的小孔中。术后分期处死动物 ,做成石蜡切片 ,行HE染色。结果 :所有动物的下颌均不同程度地偏向对照侧并伴有前牙的斜向磨耗 ,关节盘均出现了前移位且前移的量亦基本一致。结论 :为建立颞下颌关节盘前移位动物模型提供了一种较好的方法。
Objective:To establishing model of anterior disc displacement(ADD) of temporomandibular joint(TMJ) by persistent inducement of traction through orbit. Methods:The inferior and posterior walls of orbit of right side in 8 rabbits were exposed. The anterior part of disc was vertically passed through using a suture needle with an elastic rubber. The double strands of the elastic rubber was stretched forward from 7 mm to 16 mm and fixed in the hole drilled in the zygomatic arch bellow inferior orbit. The rabbits were killed 1,2,4 and 8 weeks after operation respectively, then both TMJs of each were resected. The paraffin sections were made and stained with hematoxylin & eosin. Results:The mandible of the rabbits deviated to the left side with inclined attribution of incisors. The disc was displaced forward and the degree of ADD in the rabbits was similar. Conclusions:The disc anterior displacement of temporomandibular joint can be induced by persitent anterior traction of the disc.
出处
《实用口腔医学杂志》
CAS
CSCD
北大核心
2004年第4期418-421,共4页
Journal of Practical Stomatology
基金
浙江省科技计划项目 (G2 0 0 30 2 4 1 )
