人体第一磨牙牙冠的逆向设计  

Reverse Design of Human First Molar Crown

作　　者：李欢 龚海军[1] 周涛 钟厉[1] 杨杰 Li Huan;Gong Haijun;Zhou Tao

机构地区：[1]重庆交通大学机电与车辆工程学院,重庆400074 [2]重庆先临科技有限公司,重庆402247

出　　处：《机械制造》2020年第12期23-27,35,共6页Machinery

基　　金：重庆市科委基础研究与前沿探索项目(编号:cstc2017jcyjA1654);华中科技大学材料成形与模具技术国家重点实验室开放基金资助项目(编号:P2019-003)。

摘　　要：传统牙冠制备方法已无法满足当前口腔修复的需求,对此,提出了人体第一磨牙牙冠逆向设计方法。这一方法采用三维扫描仪、Geomagic Studio软件和Geomagic Control软件对表面复杂的人体第一磨牙牙冠进行扫描测量、逆向建模与质量评估,逆向建模完成后,应用Unigraphics软件对数据模型进行有限元分析,研究不同咬合力下牙冠的变形,确定牙冠各部位的厚度,进而对牙冠进行不锈钢粉选区激光熔化快速成形。这一方法将光学扫描、点云处理、曲面拟合、有限元分析、选区激光熔化技术相结合,完成牙冠模型重构和不锈钢粉末选区激光熔化快速成形,有效缩短了金属牙冠的制备周期,保证了义齿的精度。Traditional preparation methods for dental crown can no longer meet the current needs of oral restoration.For this reason,a reverse design method for human first molar crown was proposed.This method uses 3 D scanner,Geomagic Studio software and Geomagic Control software to scan and measure the human first molar crown with complex surface,and conduct reverse modeling and quality evaluation.After the reverse modeling is completed,Unigraphics software is used to carry out finite element analysis for the data model.The deformation of the crown under different occlusal forces is studied,the thickness of each part of the crown is defined,and the crown is quickly formed by selective laser melting of stainless steel powder.This method combines optical scanning,point cloud processing,surface fitting,finite element analysis,and selective laser melting technology to complete the reconstruction of the crown model and the rapid forming of stainless steel powder by selected laser melting.The preparation cycle of the metal crown is effectively shortened,and the accuracy of the denture is guaranteed.

关 键 词：磨牙 牙冠 逆向设计 

分 类 号：R782.12[医药卫生—口腔医学]