中国组织工程研究

中国组织工程研究 ›› 2016, Vol. 20 ›› Issue (30): 4413-4418.doi: 10.3969/j.issn.2095-4344.2016.30.001

• 组织工程口腔材料 tissue-engineered oral materials •    下一篇

钛板重建下颌骨体部缺损的生物力学变化

陈 彪，范戌辉，刘耀强，岳 磊，张 睿，屈鹏飞，贾志宇，赵云转，杨 威   

  1. 河北医科大学第二医院口腔颌面外科，河北省石家庄市 050005
  • 出版日期:2016-07-15 发布日期:2016-07-15
  • 通讯作者: 杨威，硕士，主任医师，教授，河北医科大学第二医院口腔颌面外科，河北省石家庄市 050005
  • 作者简介:陈彪，男，1981年生，河北省张家口市人，汉族，硕士，主治医师，主要从事颌面外科疾病方面的研究。
  • 基金资助:

    河北省卫生厅科研基金项目(20150256)

Biomechanical analysis of mandibular body reconstruction using titanium plate

Chen Biao, Fan Xu-hui, Liu Yao-qiang, Yue Lei, Zhang Rui, Qu Peng-fei, Jia Zhi-yu, Zhao Yun-zhuan, Yang Wei   

  1. Department of Oral and Maxillofacial Surgery, Second Hospital of Hebei Medical University, Shijiazhuang 050005, Hebei Province, China
  • Online:2016-07-15 Published:2016-07-15
  • Contact: Yang Wei, Master, Chief physician, Professor, Department of Oral and Maxillofacial Surgery, Second Hospital of Hebei Medical University, Shijiazhuang 050005, Hebei Province, China
  • About author:Chen Biao, Master, Attending physician, Department of Oral and Maxillofacial Surgery, Second Hospital of Hebei Medical University, Shijiazhuang 050005, Hebei Province, China
  • Supported by:

    the Scientific Research Fund of the Hebei Provincial Health Department, China, No. 20150256

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278

被引次数

2

摘要：

 文章快速阅读：

文题释义：

 

应力：物体由于外因(受力、湿度变化等)而变形时，在物体内各部分之间产生相互作用的内力，以抵抗这种外因的作用，并力图使物体从变形后的位置恢复到变形前的位置。在所考察的截面某一点单位面积上的内力称为应力。
下颌骨缺损重建：下颌骨缺损的修复方式主要有成型钛板修复重建、非血管化骨移植重建、血管化骨组织瓣移植重建，而成型钛板重建是最基本的修复方式。内固定钛板用于重建下颌骨体部缺损有诸多优点，如易于塑型、能有效恢复面部外形等。

 

背景：三维有限元在口腔领域应用广泛，但关于下颌骨体部缺损钛板重建的三维有限元研究不多。
目的：三维有限元分析钛板重建下颌骨体部缺损的生物力学特点。
方法：建立下颌骨体部缺损双皮质钛钉钛板重建的三维有限元模型，模拟正常咬合状态，在右侧下颌骨第一磨牙咬合面中央窝垂直加载200 N的载荷，分析下颌骨、钛钉、钛板的应力分布和最大位移。
结果与结论： ①模拟咀嚼运动加载后下颌骨的应力在下颌体和下颌支部比较集中，其中应力集中比较明显的部位是下颌支的前后缘和下颌骨的下缘，下颌骨后缘的应力小于下颌骨前缘的应力，钛板固定和骨质接触部位也出现应力集中；②双皮质钛钉近螺帽处应力值最大，钛钉和钛板接触部位出现应力集中现象；③下颌骨升支部钛钉的最大应力值大于缺损前端钛钉最大应力值；④钛板的应力集中部位主要为钛钉固定部位，钛板上缘和下缘的应力峰值主要集中在下颌骨缺损前端和钛钉接触区以及下颌骨升支的钛钉接触区；⑤钛板重建下颌骨体部缺损后位移比较容易发生在缺损前端下颌骨和钛板接触部位；⑥结果表明，下颌骨体部缺损双皮质钛钉钛板固定重建相对比较稳定，下颌角前端的钛板比较容易发生断裂。

ORCID: 0000-0002-8593-7729(杨威)

中国组织工程研究杂志出版内容重点：生物材料；骨生物材料; 口腔生物材料; 纳米材料; 缓释材料; 材料相容性；组织工程

关键词: 生物材料, 骨生物材料, 钛板, 重建, 下颌骨体部缺损, 三维有限元, 生物力学分析

Abstract:

BACKGROUND: Three-dimensional finite element has been widely used in the oral cavity field, but little is reported on the three-dimensional finite element reconstruction of the mandibular body using titanium plate.
OBJECTIVE: To study the biomechanical characteristics of reconstructing the mandibular body using titanium plate.
METHODS: We established a three-dimensional finite element model of mandibular body defect undergoing reconstruction using bicortical titanium screws and titanium plate. Under the simulated normal occlusion state, a 200 N vertical load was added to the central fossa of the occlusal surface of the right mandible first molar. Then, stress distribution and maximum displacement of the mandible, titanium screw, and titanium plate were analyzed.
RESULTS AND CONCLUSION: Under the simulated normal occlusion state, mandible stress was concentrated in the mandibular body and mandibular branch, especially in the anterior and posterior edges of the mandibular branch and the lower edge of the mandible. The stress in the posterior edge of the mandible was lower than that in the anterior edge of the mandible, and moreover, the contact site between the titanium plate and the mandible also presented a concentration of stress. The maximum stress of the bicortical titanium screws appeared near the screw cap, and the stress was also concentrated at the contact site between the titanium screw and the titanium plate. The maximum stress of the titanium screw at the ascending branch of the mandible was higher than that of the titanium screw at the anterior end of the defect. For the titanium plate, the stress was mainly concentrated at the fixed site of the titanium screws; the peak stress of the anterior and posterior edges of the titanium plate was found at the contact site between the anterior end of mandibular defect and the titanium stress as well as between the ascending branch of the mandible and the titanium screw. After mandibular body reconstruction using the titanium plate, a displacement was likely to occur at the contact site between the anterior end of mandibular defect and the titanium plate. In conclusion, these findings indicate that mandibular body reconstruction using bicortical titanium screws and titanium plate is relatively stable, but the titanium plate fixed at the anterior part of the mandibular angle is prone to breakage.

 

Key words: Mandible, Titanium, Internal Fixators, Finite Element Analysis, Biomechanics, Tissue Engineering

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