Finite element analysis on different types of rigid internal fixation for preventing postoperative fractures in cystic lesions of the mandibular angle

Ping ZHENG; Jun LYU; Junjie HUANG; Shuai XU; Gang ZHANG

doi:10.16016/j.2097-0927.202304082

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Finite element analysis on different types of rigid internal fixation for preventing postoperative fractures in cystic lesions of the mandibular angle

Biomedical Engineering | 更新时间：2026-01-09

- Finite element analysis on different types of rigid internal fixation for preventing postoperative fractures in cystic lesions of the mandibular angle
- Journal of Army Medical University Vol. 45, Issue 19, Pages: 2092-封3(2023)
- 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.2097-0927.202304082
  CLC： R319;R687.32;R782.4
- Received：19 April 2023，
  
  Revised：2023-06-04，
  
  Published：15 October 2023
- 稿件说明：
移动端阅览
Ping ZHENG, Jun LYU, Junjie HUANG, et al. Finite element analysis on different types of rigid internal fixation for preventing postoperative fractures in cystic lesions of the mandibular angle[J]. Journal of Army Medical University, 2023, 45(19): 2092-封3.
DOI：

Ping ZHENG, Jun LYU, Junjie HUANG, et al. Finite element analysis on different types of rigid internal fixation for preventing postoperative fractures in cystic lesions of the mandibular angle[J]. Journal of Army Medical University, 2023, 45(19): 2092-封3. DOI： 10.16016/j.2097-0927.202304082.

摘要

目的

建立下颌角囊性病变病理性骨折的三维有限元模型，对比分析8种钛板内固定方式治疗后下颌骨的生物力学变化，探讨钛板固定方式预防大型下颌骨囊肿病理性骨折的可靠性。

方法

选取1名30岁正常成年男性下颌骨建立单侧下颌角区域的囊性病变模型，模拟咬合力加载造成病理性骨折，获取最大临界囊性病变尺寸大小，比较相同力学条件下不同钛板固定方式的下颌骨生物力学特点及变化情况。

结果

当下颌角囊性病变尺寸超过24 mm×30 mm×30 mm时存在病理性骨折的风险；上缘采用1 mm厚钛板加双侧3孔钛钉固定，下缘采用2 mm厚钛板加双侧4孔钛钉固定，下颌角囊性病变区域应力最低，未超过下颌骨最大屈服强度，未发生病理性骨折。

结论

下颌角大型囊性病变口外手术刮除后采用钛板固定术区上下缘可以降低病理性骨折发生。

Abstract

Objective

To build a model of postoperative pathological fracture of the mandibular angular cystic lesions through 3D finite element analysis (FEA)

to compare and analyze the biomechanical changes of the mandible after treatment with 8 types of titanium plates

and explore the reliability of titanium plate fixation in preventing pathological fracture of large mandibular cysts.

Methods

A 30-year-old healthy male was volunteered and the scans of cone beam computed tomography of his mandible were collected to establish a unilateral cystic lesion model of the mandibular angle region to mimic the pathological fracture caused by occlusal force loading. On the basis of the maximum critical cystic lesion size

the biomechanical characteristics and changes in the mandible with 8 different types of titanium plate fixation under the same mechanical conditions were compared.

Results

The risk of pathological fracture existed when the cystic lesion size in the mandibular angle exceeds 24 mm×30 mm×30 mm. The stress in the lesion area was the lowest when the upper edge was fixed with 1 mm thick titanium plate and bilateral 3 screws

and the lower edge was fixed with 2 mm thick titanium plate and bilateral 4 screws. At the same time the maximum yield strength of the mandible was not exceeded and no pathological fracture of the mandible occurred.

Conclusion

The incidence of pathological fracture can be reduced by using titanium plate fixation on the upper and lower margins of the mandibular angle after extraoral surgical curettage for large cystic lesions.

关键词

Keywords

references

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