外力方向对防护牙托性能影响的有限元分析

doi:10.19439/j.sjos.2018.06.003

上海口腔医学 ›› 2018, Vol. 27 ›› Issue (6): 574-578.doi: 10.19439/j.sjos.2018.06.003

外力方向对防护牙托性能影响的有限元分析

朱远兵, 赖光云, 汪俊

上海交通大学医学院附属第九人民医院·口腔医学院儿童口腔科,国家口腔疾病临床研究中心, 上海市口腔医学重点实验室,上海市口腔医学研究所,上海 200011

收稿日期:2018-10-09 出版日期:2018-12-25 发布日期:2019-01-11
通讯作者: 汪俊,E-mail：wangjun202@126.com
作者简介:朱远兵(1990-),男,硕士,住院医师,E-mail：649594283@qq.com

Effect of impact direction on the cushion property of mouthguards: a finite element analysis

ZHU Yuan-bing, LAI Guang-yun, WANG Jun

Department of Pediatric Dentistry, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine; National Clinical Research Center for Oral Diseases; Shanghai Key Laboratory of Stomatology and Shanghai Research Institute of Stomatology. Shanghai 200011, China

Received:2018-10-09 Online:2018-12-25 Published:2019-01-11
Supported by:
国家重点研发计划(2017YFC0840100,2017YFC0840110)

摘要/Abstract

摘要： 目的: 运用有限元分析评估外力方向对牙托缓冲能力的影响。方法: 采集仿真模型锥形束CT（CBCT）影像资料,利用MIMICS软件建立分析模型。运用ABAQUS软件模拟研究在牙托厚度不同的情况下（分别为0、1.5、3、4.5和6 mm）,经不同方向外力（撞击方向与牙长轴交角分别为30°、60°、90°和120°）撞击后,牙体表面的应力变化情况,进而评价牙托的缓冲能力。结果: 在研究实验条件下,当牙托厚度较薄时（1.5 mm和3 mm）,与其他方向相比,牙托缓冲效率在60°交角时最低,在120°交角时最高。而在牙托厚度增加后（4.5 mm和6 mm）,牙托缓冲效率在90°交角时最低,在30°交角时最高。外力方向不同时,牙托的应力缓冲效率随着牙托厚度的增加而提高。结论: 外力方向对防护牙托的缓冲能力有一定影响,但其易受牙托厚度的影响。

关键词: 防护牙托, 牙外伤, 有限元分析

Abstract: PURPOSE: The aim of this study was to evaluate the cushion property of mouthguards when the impact object came from different directions. METHODS: A 3D finite element model of upper central incisor, periodontal ligament and alveolar bone was developed based on cone-beam CT (CBCT) images of a plastic teeth model. The mouthguards were modeled in 5 different thickness (T: 0, 1.5, 3, 4.5 and 6 mm) and a nonlinear dynamic impact analysis, in which the finite element models were collided by a steel ball from different directions (D: angles between the impact direction and the long axis of tooth were 30°, 60°, 90°, 120°, respectively), was performed. The stress cushion efficiency was calculated. RESULTS: The stress cushion efficiency of the mouthguards varied with different thicknesses and impact directions. When T=1.5 mm and 3 mm, the stress cushion efficiency was minimal as D=60° and maximal as D=120°. However, when T=4.5 mm and 6 mm, the stress cushion efficiency was minimal as D=90° and maximal as D=30°. Moreover, the stress cushion efficiency of mouthguards improved with the increasing thickness in each impact direction. CONCLUSIONS: The impact direction affects the stress cushion efficiency of mouthguards, which however is influenced by the thickness of mouthguards.

Key words: Mouthguard, Dental trauma, Finite element analysis

中图分类号:

R788.4

朱远兵, 赖光云, 汪俊. 外力方向对防护牙托性能影响的有限元分析[J]. 上海口腔医学, 2018, 27(6): 574-578.

ZHU Yuan-bing, LAI Guang-yun, WANG Jun. Effect of impact direction on the cushion property of mouthguards: a finite element analysis[J]. Shanghai Journal of Stomatology, 2018, 27(6): 574-578.

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外力方向对防护牙托性能影响的有限元分析

Effect of impact direction on the cushion property of mouthguards: a finite element analysis

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