口腔医学研究

口腔医学研究 ›› 2019, Vol. 35 ›› Issue (1): 75-79.DOI: 10.13701/j.cnki.kqyxyj.2019.01.018

• 口腔种植修复学研究 • 上一篇    下一篇

不同厚度的3D打印个性化钛网的三维有限元分析

白丽云, 季平, 李显, 李林林, 高慧, 王超*   

  1. 重庆医科大学附属口腔医院,口腔疾病与生物医学重庆市重点实验室, 重庆市高校市级口腔生物医学工程重点实验室 重庆 401147
  • 收稿日期:2018-07-03 出版日期:2019-01-18 发布日期:2019-01-28
  • 通讯作者: 王超,E-mail:wangchao_buaa@163.com
  • 作者简介:白丽云(1993~ ),女,重庆人,硕士在读,主要从事口腔种植的临床治疗工作。
  • 基金资助:
    国家自然科学基金面上项目(编号:11872135);重庆市科委社会民生一般项目(编号: cstc2015shmszx10008);重庆市渝北区科委重点项目[2015(社)01号];重庆市卫生计生委面上项目(编号: 2017MSXMD73);重庆高校创新团队建设计划资助项目(编号: CXTDG201602006); 重庆市高校市级口腔生物医学工程重点实验室资助项目(编号:渝教科【2015】55号);重庆医科大学附属口腔医院科研培育项目(编号:PYM201605)

Three Dimensional Finite Element Analysis of Customized Titanium Mesh with Different Thicknesses

BAI Li-yun, JI Ping, LI Xian, LI Lin-lin, GAO Hui, WANG Chao*   

  1. Department of Oral and Maxillofacial Surgery, Chongqing Key Laboratory of Oral Diseases and Biomedical Science, Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Affiliated Stomatological Hospital Chongqing Medical University, Chongqing 401147, China
  • Received:2018-07-03 Online:2019-01-18 Published:2019-01-28

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摘要： 目的:基于三维有限元的方法,分析不同厚度的个性化钛网在承力时其应力形变分布,为颌骨大面积缺损个性化钛网的设计提供生物力学指导。方法:选择1例32-42牙列缺损并且伴大面积颌骨缺损的患者,提取其颌骨数据并进行三维重建,设计不同厚度的个性化钛网并建立三维有限元模型,然后通过有限元方法分析0.3、0.4、0.5 mm三种不同厚度钛网的在承力时其应力形变分布。结果:随着钛网厚度的增加,钛网的应力形变均呈下降趋势,钛钉所受到的应力与钛网厚度无关,最大应力值均为260 MPa。结论:0.3 mm厚度的钛网所能够承受的力量较小,对于较大面积的骨组织缺损特别是在后牙区域可能无法满足临床需求。0.4、0.5 mm的钛网应力值在安全等效应力范围内,强度足够,可满足临床需要。考虑到厚度越厚对黏膜的刺激性越大,因此,0.4 mm厚度的钛网更适用于临床需求。

关键词: 有限元分析, 三维重建, 个性化钛网

Abstract: Objective: To explore the stress distribution of customized titanium mesh for large bone defect under the loading of 100 N by finite element analysis so as to provide biomechanical guidance for the design of personalized titanium mesh. Methods: The three-dimensional reconstruction of the mandible was reconstructed based on the CBCT scanning data and the individualized titanium mesh with different thicknesses were designed. Then, three-dimensional finite element modeling and finite element mechanical analysis were carried out. Results: Under the loading of 100 N, the stress distribution of titanium mesh was uniform and without stress concentration. With the increase of thickness, the maximum Von Mises stresses of titanium mesh were in a downward trend, the stress of titanium screw was not related to the thickness of titanium mesh. Conclusion: Titanium mesh with 0.3 mm thickness can withstand less power, which may not meet the clinical needs for larger bone tissue defects, especially in posterior teeth. The stress values of the titanium mesh with thickness of 0.4 mm and 0.5 mm are all within the safe equivalent stress range of titanium mesh. They have enough strength and are suitable for clinical needs. Considering that the titanium mesh may result in mucosal irritation that leads to exposure of the membrane, the titanium mesh with a thickness of 0.4 mm is more appropriate for clinical need.

Key words: Three dimensional finite element, Three dimensional reconstruction, Customized titanium mesh