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目的:利用螺旋CT扫描数据建立含骨缝的犬单侧牙槽突裂三维有限元模型,为研究牙槽突裂植骨后的治疗提供评价工具。方法:基于螺旋CT扫描Beagle犬全头颅的Dicom数据,综合应用Mimics医学影像系统、Geomagic Studio几何软件和Femap有限元前处理软件,建立含骨缝犬单侧牙槽突裂的有限元模型。模型设计按动物实验要求,模拟临床上的扩弓治疗方式,在双侧犬齿上加载扩弓力,观察植骨区的应力和位移变化。结果:建立了含骨缝犬单侧牙槽突裂的三维有限元模型,模型的单元数和节点数分别为3 871 464和790 092。有限元分析结果与动物实验结果一致。结论:基于螺旋CT和Mimics、Geomagic Studio、Femap等软件相结合的方法,对含骨缝犬单侧牙槽突裂进行的三维几何重建和有限元建模,可用于生物力学分析。
OBJECTIVE: To establish a three-dimensional finite element model of unilateral alveolar cleft with a canine fracture using helical CT scan data and to provide an evaluation tool for the study of treatment of alveolar cleft bone graft. Methods: Based on the Dicom data of all cranium of Beagle dogs with spiral CT, the finite element model of unilateral alveolar cleft was established by using the combination of Mimics medical imaging system, Geomagic Studio geometry software and Femap finite element software. Model design according to the requirements of animal experiments to simulate the clinical expansion of the bowel approach in the bilateral canine arch load expansion force to observe the bone graft area stress and displacement changes. Results: A three-dimensional finite element model of unilateral alveolar cleft was established. The number of units and nodes in the model were 3871 464 and 790 092, respectively. Finite element analysis results are consistent with animal experiments. Conclusion: Based on the combination of spiral CT, Mimics, Geomagic Studio and Femap, 3D geometric reconstruction and finite element modeling of unilateral alveolar cleft with suture can be used for biomechanical analysis.