对正畸牙模进行轻量化设计，是降低隐形正畸成本的重要途径。以实际牙模为研究对象，采用有限元方法，将压膜工艺等效为牙模外表面的法向载荷，采用相同变形量时正畸牙模的减重效果作为轻量化设计评价指标，对空心、蜂窝、正方体三种轻量化结构填充牙模进行变形仿真分析；最后，更换实际牙模，对分析结果进行验证。研究结果认为：在正畸牙模减重效果方面，蜂窝结构最优、正方体结构次之、空心结构最差。

Orthodontic dental casts lightweight research was very important to reduce the cost of invisible orthodontics. Actual dental casts deformation was analyzed by finite element method, which were successively filled by hollow, honeycomb, and cube structures. Film lamination was equivalent to the outer surface normal load of orthodontic dental casts, whose overall deformation was measured to evaluate lightweight design. At last the new dental cast was used to verify the research results. The results indicate that honeycomb structure is best for orthodontic dental casts lightweight design, which is followed by cubic and hollow structure successively.

TQ325.7

河南省高等教育教学改革研究与实践项目(研究生教育)(2021SJGLX069Y)；河南省研究生教育改革与质量提升工程项目(YJS2022JD50)。Postgraduate Education Reform Project of Henan Province (2021SJGLX069Y); Postgraduate Education Reform and Quality Improvement Project of Henan Province(YJS2022JD50).