基于4种软件的牙周病患者牙齿建模和受力分析

发布时间：2018-09-14 18:15

【摘要】：目的根据牙周病患者的牙齿CT数据和石膏模型,基于4种软件进行建模分析,获得病人牙齿受力和应力分布状况,为牙周病患者的临床治疗提供参考。方法利用Mimics软件对CT图像进行初步处理,建立三维点云模型;把初步建立的模型利用逆向工程软件Geomagic对模型进行参数化建模和修整,建立三维曲面模型;将曲面模型导入三维绘图软件Solid Works中,通过实体转换输出三维实体模型;最后利用有限元分析软件ANSYS对牙齿的三维实体模型进行分析。结果获得了上牙的应力分布,确定了应力集中点的位置。并对应力集中点的牙齿进行单独分析,其最大应力为1 774.8 MPa,再根据应力分布对咬合关系进行调整,调整后的牙齿最大应力减小为1 529 MPa。结论所介绍的牙齿建模分析方法,可以模拟各种咬合关系的修正,并计算修正后的牙齿应力分布,为牙周病的临床治疗提供理论依据。
[Abstract]:Objective based on CT data and gypsum model of patients with periodontal disease, four kinds of software were used to model and analyze the tooth stress and stress distribution in order to provide reference for clinical treatment of periodontal disease patients. Methods the 3D point cloud model was established by using the Mimics software to process the CT image, and the model was parameterized and trimmed by the reverse engineering software Geomagic, and the 3D surface model was established. The surface model is imported into the 3D drawing software Solid Works, and the 3D solid model is output by entity transformation. Finally, the 3D solid model of the tooth is analyzed by using the finite element analysis software ANSYS. Results the stress distribution of upper teeth was obtained and the position of stress concentration point was determined. The teeth with stress concentration point were analyzed separately. The maximum stress was 1 774.8 MPa, and the occlusal relation was adjusted according to the stress distribution. The maximum stress of the adjusted tooth was reduced to 1 529 MPa.. Conclusion the method of tooth modeling and analysis can simulate the correction of various occlusal relationships and calculate the stress distribution of teeth after correction, which provides a theoretical basis for the clinical treatment of periodontal diseases.
【作者单位】：四川大学制造科学与工程学院;四川大学华西口腔医院牙周病科;
【基金】：四川省科技支撑计划项目(2015SZ0137)
【分类号】：R781.4;TP311.56

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