口腔医学研究 ›› 2017, Vol. 33 ›› Issue (2): 194-198.DOI: 10.13701/j.cnki.kqyxyj.2017.02.019

• 临床研究论著 • 上一篇    下一篇

安氏Ⅱ1类患者颞下颌关节三维有限元分析

吕儒雅1, , 王婧1, 刘海霞1*, 韩蓓蕾1, , 王为2   

  1. 1. 新疆医科大学第二附属医院口腔科 新疆 乌鲁木齐 830000;
    2. 乌鲁木齐大为创新信息科技有限公司 新疆 乌鲁木齐 830000
  • 收稿日期:2016-08-23 出版日期:2017-02-20 发布日期:2017-02-22
  • 通讯作者: 刘海霞,E-mail:kqlhx@sina.com
  • 作者简介:吕儒雅(1988~ ),女,河南驻马店人,硕士在读,主要从事牙颌畸形诊断与治疗技术的研究。

Three-dimensional Finite Element Analysis of Temporomandibular Joint in Patients with Class Ⅱ Division 1.

LV Ru-ya1, WANG Jing1, LIU Hai-xia1*, HAN Bei-lei1, WANG Wei2.   

  1. 1. Department of Stomatology, The Second Affiliated Hospital of Xinjiang Medical University, Urumqi 830000, China;
    2. Urumqi Dawei Innovative Information Technology limited Company, Urumqi 830000, China
  • Received:2016-08-23 Online:2017-02-20 Published:2017-02-22

摘要: 目的:对比分析安氏Ⅱ1类错牙合与正常牙合在牙尖交错位紧咬牙时颞下颌关节的应力分布。方法:运用相关软件将志愿者的CT及MRI数据融合,构建个别正常牙合及安氏Ⅱ1类错牙合颞下颌关节有限元模型,分别对其进行边界约束和力学加载,分析描述两者颞下颌关节各个部位的应力分布。结果:正常牙合两侧颞下颌关节应力分布基本对称,安氏Ⅱ1类错牙合颞下颌关节的应力分布特征与正常牙合基本一致,但下颌骨、髁突及颞骨关节窝的等效应力值比正常牙合增大;关节盘的等效应力有所下降,但其上下表面的中间带应力值比正常牙合增大。结论:安氏Ⅱ1类错牙合患者在牙尖交错位时的应力分布增大了其罹患颞下颌关节紊乱病的危险性,应及时矫治为其颞下颌关节提供一良好的生物力学环境。

关键词: 安氏Ⅱ类1分类, 个别正常合, 颞下颌关节, 三维有限元

Abstract: Objective: To compare and analyze the stress distribution and biomechanic characters of temporomandibular joint (TMJ) by loading on the normal and ClassⅡ division1 occlusion using finite element models. Methods: The normal and ClassⅡdivision1 three-dimensional finite element models were constructed by integrating the data of CT and MRI. And then the stress distribution in the temporomandibular joint parts was conducted after mechanical loading and boundary constraint to two models, respectively. Results: The stress distribution of the TMJ was approximately symmetrical in normal occlusion. No significant difference was found in stress distribution between normal and. However, in ClassⅡdivision1 occlusion, the values on mandibular, condylar and glenoid fossa were higher, the values on joint disc were lower, and the values on top and bottom surface were higher than those in the normal occlusion. Conclusion: The stress distribution of ClassⅡdivision1 occlusion increases its risk of temporomandibular joint disorder syndrome. It should be promptly corrected to provide a good biomechanical environment for the temporomandibular joint.

Key words: ClassⅡdivision1 , Individual normal occlusion, Temporomandibular joint, Three-dimensional finite element

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