Finite element simulation and biomechanical analysis of indirect injury of temporomandibular joint under lateral impact on the angle of human mandible

Junjie HUANG; Shuai XU; Yandan JI; Gang ZHANG; Yinghui TAN

doi:10.16016/j.1000-5404.202003344

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Finite element simulation and biomechanical analysis of indirect injury of temporomandibular joint under lateral impact on the angle of human mandible

Basic Medicine | 更新时间：2026-01-09

- Finite element simulation and biomechanical analysis of indirect injury of temporomandibular joint under lateral impact on the angle of human mandible
- Journal of Third Military Medical University Vol. 42, Issue 15, Pages: 1511-1518(2020)
- 作者机构：
  
  400037 重庆，陆军军医大学(第三军医大学)第二附属医院口腔科
- 作者简介：
- 基金信息：
  
  the Military Medical High-tech Training Project of Army Medical University(CX2019JS108);the Major Innovative Technology Development Program of Second Affiliated Hospital of Army Medical University(2018JSLC0022)
- DOI：10.16016/j.1000-5404.202003344
  CLC： R318.01;R642;R782.6
- Received：26 March 2020，
  
  Revised：2020-05-06，
  
  Published：15 August 2020
- 稿件说明：
移动端阅览
Junjie HUANG, Shuai XU, Yandan JI, et al. Finite element simulation and biomechanical analysis of indirect injury of temporomandibular joint under lateral impact on the angle of human mandible[J]. Journal of Third Military Medical University, 2020, 42(15): 1511-1518.
DOI：

Junjie HUANG, Shuai XU, Yandan JI, et al. Finite element simulation and biomechanical analysis of indirect injury of temporomandibular joint under lateral impact on the angle of human mandible[J]. Journal of Third Military Medical University, 2020, 42(15): 1511-1518. DOI： 10.16016/j.1000-5404.202003344.

摘要

目的

通过有限元法(finite element method，FEM)构建人颞下颌关节(temporomandibular joint，TMJ)骨肌系统三维有限元模型，模拟下颌角区撞击伤后TMJ骨肌系统间接损伤的生物力学响应。

方法

采用1名成年男性头部的CT和MRI数据组合，利用有限元软件完成TMJ骨肌系统三维模型的构建。模拟特定撞击物对下颌角撞击伤，获得TMJ各结构的Von Mises应力云图和下颌骨骨折动态图。

结果

撞击时高应力区分布于撞击侧髁突颈部。当碰撞速度为2.87 m/s时，下颌骨无骨折；速度为7.22 m/s时，左侧髁突刚好发生线性骨折，骨折无移位；速度为8.33 m/s时，左侧髁突完全离断性骨折；速度大于9.72 m/s时，双侧髁突及颏部均发生完全骨折。髁突颈部的高应力向关节窝传递，受关节盘的缓冲作用而迅速降低。本实验撞击条件下，关节盘、咬肌受力时产生压缩形变。

结论

利用FEM有效地模拟TMJ在下颌角侧方不同速度碰撞载荷下的致伤过程，验证了该模型可以更快捷、准确地预测TMJ各结构的损伤类型，并且指导临床防护。

Abstract

Objective

To analyze the biomechanical response of temporomandibular joint (TMJ) musculoskeletal system under lateral impact load through 3D finite element method (FEM).

Methods

The finite element model of TMJ system was built based on the combination of CT and MRI data of human head by finite element software. The Von Mises stress cloud maps of TMJ structures and the dynamic maps of mandibular fractures were obtained by the impact of impactor was simulated on the mandibular angle.

Results

The peak stress was found in the impacted condyle neck area. When the impacting velocity was at 2.87 m/s

there was no fracture; as the velocity increased to 7.22 m/s

the left condyle just happened to have a linear fracture without displacement; the left condyle completely fractured as the speed at 8.33 m/s; when the velocity was 9.72 m/s

then both 2 condyles and the mental region completely fractured. The high stress in the condyle neck was transmitted to the articular fossa

which was rapidly reduced by the cushioning effect of the articular disc. Under the impact condition of this experiment

the joint disc and the masseter muscle were compressed and deformed under the stress.

Conclusion

With the aid of FEM

the injury process of TMJ under the impact load of different velocities on the angle of mandibular simulate is stimulated. The model can quickly and accurately predict the injury types of TMJ structures and guide clinical protection.

关键词

Keywords

references

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