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背景:国内建立了减阻牵张成骨快速牙移动的实验动物模型,主要以基础研究为主,尚未见探讨减阻牵张成骨快速牙移动生物力学机制的文献。目的:基于CT法结合Mimics医学图像处理系统建立几何相似性和力学相似性较高的减阻牵张成骨术快速移动尖牙的三维有限元模型,为减阻牵张成骨术快速移动尖牙的生物力学分析、优化设计、和手术方法的选择建立灵活的分析平台。方法:通过64排螺旋CT对拔除第一前磨牙的成人上颌骨进行扫描,获得上颌骨、上颌牙列截面影像的DICOM数据。采用Mimics软件、GeomagicStudio8.0软件、UnigraphicsNX软件、Ansys11.0软件相结合的方法,建立包括上颌骨、上颌牙齿及牙周膜的减阻牵张成骨术快速移动尖牙的三维有限元模型。结果与结论:建立了由43477个单元,83577个节点组成的上颌减阻牵张成骨术快速移动尖牙的三维有限元模型,还可根据不同的研究目的和要求添加或删除组件。所建立的三维有限元模型能较真实模拟实际情况,具有较好的力学和几何学相似性,可用于进行减阻牵张成骨术中尖牙快速移动的生物力学研究,进而为临床操作提供理论依据。
BACKGROUND: An experimental animal model of drag reduction and distraction osteogenesis with rapid tooth movement has been established in our country. The basic research is the main one. There is no literature on biomechanical mechanism of drag reduction and distraction osteogenesis with rapid tooth movement. OBJECTIVE: To establish a three-dimensional finite element model of fast-moving canine by drag reduction and distraction osteogenesis based on CT and Mimics medical image processing system. Biomechanical analysis of teeth, optimization of design, and selection of surgical methods to establish a flexible analysis platform. Methods: DMBM data of the maxillary and maxillary dentition cross sections were obtained by scanning the maxillary bone of the first premolar extracted by 64-slice spiral CT. A three-dimensional finite element model of fast-moving canine with drag-reducing distraction osteosynthesis including maxillary, maxillary and periodontal ligament was established by using Mimics software, Geomagic Studio 8.0 software, UnigraphicsNX software and Ansys11.0 software. RESULTS AND CONCLUSION: A three-dimensional finite element model of maxillary drag-distraction distraction osteotomy composed of 43477 units and 83577 nodes was established. Components could be added or deleted according to different research purposes and requirements. The established three-dimensional finite element model can more realistic simulation of the actual situation, has good mechanical and geometric similarity, can be used for drag reduction distraction osteotomy rapid movement of the canine biomechanical study, thus providing clinical practice Theoretical basis.