摘要
目的:为口腔生物力学的研究和优化修复体及假体的设计提供研究手段,为下颌骨各种手术方案进行虚拟手术效果分析提供模型。方法:选择一名颞颌系统发育正常的中年男性,采用螺旋CT扫描机对其下颌骨螺旋扫描,获得123幅二维扫描断层图像;采用自研图像处理软件将二维断层图像处理为三维点云,在CATIA中进行曲面拟合,建立了形状精确的下颌骨CAD模型;采用MSC.Patran建立了下颌骨手术方案所需的有限元模型。结果:建立了全牙列下颌骨的CAD模型及三维有限元模型。结论:正常下颌骨三维有限元模型真实反应了下颌骨的几何形态,与实体下颌骨具有较好的相似性,可作为生物力学研究的工具;为针对下颌骨的各种手术提供了一种术前设计的定量方法。
Objective To provide research means for study of buccal cavity vitodynamics and design of optimized dental prosthetic restoration and prosthesis, give model for virtual surgery effectiveness analysis of the varied mandible surgery program. Methods A middle-aged man with normotrophic temporomandibular system was chosen and 123 widths of two- dimensional CT scan images were obtained through scanning his mandible by spiral CT scanner. The precise shaped mandible CAD mode was established through surface fitting by CATIA of three-dimensional spot-cloud transformed from two-dimensional CT images by image processing software, and the finite element model required for mandible surgery program was established by MSC. Patran. Results The full dentition mandible CAD models and three-dimensional finite element models were estabhshed. Conclusion The normal three-dimensional finite element mandible model can really reflect the geometrical feature of mandible and has good similarity to physical mandible and it can be used as a research means for biomechanical studies. The model can be also provided pre-operative designed quantitative method for the variety of mandible surgeries.
出处
《医疗卫生装备》
CAS
2009年第4期30-32,共3页
Chinese Medical Equipment Journal
