中国临床解剖学杂志 ›› 2017, Vol. 35 ›› Issue (4): 419-424.doi: 10.13418/j.issn.1001-165x.2017.04.013

• 临床生物力学 • 上一篇    下一篇

不同牙 合  位时翼外肌对颞下颌关节盘的生物力学影响

殷学民1, 张琰1, 李子文2, 刘啸3, 宋梦阳1, 王方圆1, 刘小豪1   

  1. 1.南方医科大学南方医院口腔颌面外科,  广州   510515; 2.厦门市口腔医院口腔颌面外科,  厦门   361000;
    3.上海交通大学医学院附属仁济医院口腔颌面外科,  上海   200127
  • 收稿日期:2017-03-06 出版日期:2017-07-25 发布日期:2017-08-30
  • 作者简介:殷学民(1965-),男,博士,教授,硕士生导师,主要从事口腔颌面外科的临床工作,Tel:020-61642022,E-mail: yinxm@smu.edu.cn
  • 基金资助:

    广东省科技计划项目(2014A020212397)

Effect of the lateral pterygoid muscle on the anterior disc displacement with reduction of temporomandibular joint under different occlusal position

YIN Xue-min1, ZHANG Yan1, LI Zi-wen2, LIU Xiao3, SONG Meng-yang1, WANG Fang-yuan1, LIU Xiao-hao1   

  1. 1. Department of Oral and Maxillofacial Surgery,NanfangHospital, Southern Medical University, Guangzhou 510515, China;  2. Department of Oral and Maxillofacial Surgery,Xiamen oral hospital, Xiamen 361000, China;  3. Renji Hospital of Shanghai Jiao Tong University School of Medicine, Shanghai 200127,  China
  • Received:2017-03-06 Online:2017-07-25 Published:2017-08-30

摘要:

目的 研究在牙尖交错位和最大张口位时可复性关节盘前移位中翼外肌对关节盘的生物力学影响及两牙合  位之间的差异。  方法 对已经建立的可复性关节盘前移位的颞下颌关节数字化仿真模型,在不同牙合  位时进行翼外肌加载,通过三维有限元的方法进行生物力学分析。 结果 最大张口位时,关节盘应力集中区较牙尖交错位时向前外侧移动,集中于关节盘中间带偏外侧区;关节盘中间带与关节盘后带之间存在明显位移差,形成位移撕裂带,而在牙尖交错位时则无类似位移差现象。 结论 在可复性关节盘前移位中,最大张口位时翼外肌可导致关节盘中间带偏外侧区的应力集中,在关节盘中间带形成位移撕裂带,导致此区域变薄、穿孔甚至撕裂。

关键词: 颞下颌关节盘,  翼外肌,  可复性关节盘前移位,  生物力学

Abstract:

Objective To analyze the effect of lateral pterygoid muscle on anterior disc displacement with reduction of temporomandibular joint (TMJ) under different occlusal position. Methods Lateral pterygoid muscle was loaded under different occlusal position to simulate and biomechanically analyze the TMJ anterior disc displacement with reduction by using the established digital simulation model. Results Under the maximum jaw opening status, the disc region with the highest stress concentration occurred in the lateral part of the intermediate zone; the tendency of displacement  appeared between the intermediate zone and the posterior band to form a tearing region. Under the intercuspal position, the disc region with the highest stress concentration occurred in the posteroir band and there was not a tearing region between the intermediate zone and the poster band. Conclusions The results indicate that the function of the lateral pterygoid muscles can lead to the stress concentration on intermediate zone of the articular disc under the maximum jaw opening status, resulting in a tearing region in the articular disc.

Key words: Temporomandibular joint disc,  Lateral pterygoid muscle,  Anterior discdisplacement with reduction,  Biomechanics