国产标准型人工颞下颌关节假体生物力学分析  

Biomechanical analysis of Chinese standard artificial temporomandibular joint

作　　者：张露珠 何冬梅[1] 杨磊[2] 朱华诞 常雨丝 章文玥 杨智[1] 詹伊宁 ZHANG Lu-zhu HE Dong- mei YANC Lei ZHU Hua -dan CHANG Yu -si ZHANG Wen -yue YANG Zhi ZHAN Yi -ning(Department of Oral Surgery, Shanghai Ninth People＇ s Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine ＆ Shanghai Key Laboratory of Stomatology ,Shanghai 200011, China)

机构地区：[1]上海交通大学医学院附属第九人民医院·口腔医学院口腔外科,上海市口腔医学重点实验室,上海200011 [2]上海交通大学材料科学与工程学院,上海200240 [3]上海格麟倍信息科技有限公司,上海201114

出　　处：《中国实用口腔科杂志》2017年第3期142-145,共4页Chinese Journal of Practical Stomatology

基　　金：国家自然科学基金(81472117);上海交通大学医工交叉基金(YG2014MS05);国家级大学生创新训练项目(2015502);上海市科学技术委员会科研计划项目(14DZ2294300)

摘　　要：目的探索国产标准型人工颞下颌关节假体的应力分布特点及形变情况。方法利用ANSA、Hypermesh、abaqus等软件建立人工颞下颌关节修复下颌骨髁突缺损的有限元模型,在模拟最大咬合力加载情况下,分析4种国产标准型人工颞下颌关节假体及颌骨的等效应力分布特点和形变情况,并与美国Biomet标准型假体进行比较。结果 4种国产标准型人工颞下颌关节假体的最大等效应力值分别为54、79、64、72 MPa,美国Biomet标准型假体最大等效应力值为78 MPa,各模型中颌骨的等效应力值均低于20 MPa,最大形变值均小于0.05 mm。4种国产标准型人工颞下颌关节假体的等效应力均集中于下颌支假体后缘最上方的钉孔后部,而美国Biomet标准型假体的等效应力则集中于下颌支假体颈部。结论 4种国产标准型人工颞下颌关节假体应力分布均匀,可避免过大应力导致的假体断裂及骨质吸收等情况发生。Objective To study the stress distribution and displacement of the Chinese standard artificial temporomandibular joint. Methods ANSA, Hypermesh and Abaqus softwares were used to establish finite element model of condylar defect, which was reconstructed separately by Chinese and Biomet standard artificial temporomandibular joint. The stress distribution and displacement of the jaw and Chinese and Biomet standard artificial temporomandibular joints were analyzed by loading maximal bite force on the model. Results The maximum stress of four kinds of Chinese standard prostheses were 54MPa, 79MPa, 64MPa and 72MPa, while maximum stress of Biomet standard prosthesis was 78MPa. The stress of the jaw was under 20MPa in each model, and the displacement of prosthesis and jaw was under 0.05ram. The maximum stress of Chinese standard prosthesis occurred at the first posterior screw hole, whereas for Biomet standard prosthesis it was located at the neck of the condyle. Conclusion The stress is distributed uniformly in Chinese standard prostheses, which can avoid prosthesis fracture and bone absorption caused by excessive stress.

关 键 词：人工颞下颌关节 生物力学分析 国产标准型 

分 类 号：R78[医药卫生—口腔医学]