基于ABAQUS的下颌骨生物力学分析

为解决游离腓骨瓣修复下颌骨缺损手术存在个体匹配差的问题，采用定制化修复钛板设计和制造方法.通过采集分析病人CT数据，利用可视化和CAD技术设计出符合病人生理结构的修复体模型.建立下颌骨的有限元模型，对比了修复前后的下颌骨的应力情况.利用快速原型技术制造出树脂模型用于手术指导，通过临床研究，该方法节省手术时间，提高手术成功率.下颌骨有限元分析结果表明:下颌骨应力集中区域主要分布于踝突区、下颌角、下颌骨修复处.随着加载力的增大，应力增加明显，特别是下颌骨修复处与踝突区应力分布增长明显.最大应力出现在下颌骨与腓骨的结合处，修复后的下颌骨高应力区泛化的现象得到明显的遏制，应力集中区域明显地减少.

Biomechanical Analysis of Mandible Based on ABAQUS

In order to improve the individual matching of free fibula flap for mandible defect reconstruction， a custom made titanium plate design and manufacture were presented. The visualization and CAD were adopted to design the repair model with biomimetic shape by CT data. A finite element model of the mandible was created. The stress of the mandible before and after repair was compared with each other. Rapid prototyping was employed to build the resin mold， which can save the surgery time and improve the success rate. The mandible finite element analysis results show that the mandible stress concentration area was broadly distributed in mandible ankle protrusion area， mandibular angle，and the mandible repair. With increase of the loading force， stress increased significantly， especially in mandible ankle protrusion area and the mandible repair. The maximum stress appeared at the junction of the mandible and fibula. The high stress generalization of the repaired mandible was checked. Areas of stress concentration decreased significantly.