颞下颌关节侧向咬合位与对刃位薄层塑化断面对照研究  

Comparative study of plastination section of the human temporomandibular joint in the position of mandibular lateral displacement and edge-to-edge of dental occlusion

作　　者：杨晓萍[1] 张绍祥[2] 马强华[1] 谭立文[2] 邱明国[2] 

机构地区：[1]甘肃兰州军区兰州总医院影像诊断中心,730050 [2]重庆第三军医大学基础部解剖教研室

出　　处：《实用口腔医学杂志》2006年第4期478-481,共4页Journal of Practical Stomatology

基　　金：国家自然科学基金资助项目(NO.30270698)

摘　　要：目的:对比分析下颌对刃位、侧向咬合位颞下颌关节的运动解剖形态,为颞下颌关节病变提供解剖依据。方法:将8例新鲜尸头摆置成对刃位5例、下颌侧向咬合位3例,以颞下颌关节为中心,切割成8cm×8cm×10cm的标本块,利用生物塑化技术,制成斜矢状位、斜冠状位、轴位塑化断层标本共16套。下颌侧向咬合位工作侧、非工作侧关节形态改变与对刃位相对照。结果:下颌侧向咬合位工作侧,髁突在关节窝内向后、向上、向外移位,关节盘位置无变化,关节盘双板及后带受压;非工作侧,髁突向下、向前、向内侧移位,关节盘后带位置向下移位,无前移位,关节盘中带外侧位居上下关节面之间,明显受压变薄。结论:关节盘并非随髁突作同步同向运动。关节盘在髁突作滑动运动时发生移位;当转动运动、滑动运动复合出现时,关节盘发生移位;而在关节窝内发生的转动运动,关节盘不发生移位。Objective：To analyse the anatomical change of the human temporomandibular joint（TMJ） in the position of mandibular lateral displacement and to provide the anatomical data for temporomandibular disorder. Methods.3 of the 8 samples of selected fresh cadavers were adjusted to mandibular lateral displacement position, and 5 to edge-to-edge occlusion position ,then samples were fixed and sectioned according to coronal and sagittal planes by using plastination technique. The feature of the thin plastination sections of the TMJ in the mandibular lateral displacement position and were compared with that in edge-to-edge occlusion position. Results：On the working side in mandibular lateral displacement position, condylar moved backwords, upwards and outside in the articular fossa. Articular discs of TMJ did not move following condylar movement, but posterior band of the articular disc was suppressed by the condylar and articular fossa. On the non-working side in mandibular lateral displacement position, condylar moved ahead, downwards and inwards along posterior incline of articular tuberculum, then articular discs did not move, and middle band of articular discs was suppressed by the condyle and articular tuberculum. Conclusions：The TMJ disc does not shift as TMJ condylar process turns in articular fossa. When the condylar turns and slides at the same time,the articular discs shift.

关 键 词：颞下颌关节 下颌侧向咬合位 下颌对刃位 生物塑化技术 

分 类 号：R322[医药卫生—人体解剖和组织胚胎学]