可摘局部义齿支架的计算机辅助设计与快速制造  

Computer aided design and rapid manufacturing of removable partial denture frameworks

作　　者：韩静[1] 吕培军[2] 王勇 

机构地区：[1]北京大学口腔医学院·口腔医院修复科,100081 [2]卫生部口腔医学计算机应用工程技术研究中心

出　　处：《中华口腔医学杂志》2010年第8期457-461,共5页Chinese Journal of Stomatology

基　　金：国家高技术研究发展计划（2006AA03Z446）

摘　　要：目的 自主开发可摘局部义齿支架三维设计软件及选择性激光熔融制造（selective laser melting,SLM）设备,探讨应用其进行可摘局部义齿支架设计并直接成形金属支架的方法 .方法 使用层析扫描仪获得两个牙列缺损模型的三维点云数据.使用自主开发的可摘局部义齿支架三维设计软件进行模型观测及可摘局部义齿支架（牙合）支托、卡环、舌杆、金属加强网、上颌大连接体等组件的设计.组件设计路线：首先确定组织面轮廓,利用轮廓线内的点云数据生成组织面.根据各个组件的特点,设定抛光面截面形态,结合轮廓线生成抛光面.各组件完成后,用小连接体连成完整支架.将完成的支架数据导入SLM设备中,直接成形金属支架.结果 应用自主开发的可摘局部义齿支架三维设计软件及SLM设备,成功进行了两个可摘局部义齿金属支架的计算机辅助设计及快速制造,在模型上试戴后目测金属支架适合性良好.结论 自主开发的具有完全自主知识产权的可摘局部义齿支架计算机辅助设计与辅助制作系统,可为可摘局部义齿金属支架的制作提供一种新的方法.Objective To introduce a method of digital modeling and fabricating removable partial denture（RPD） frameworks using self-developed software for RPD design and rapid manufacturing system.Methods The three-dimensional data of two partially dentate dental casts were obtained using a threedimensional crossing section scanner. Self-developed software package for RPD design was used to decide the path of insertion and to design different components of RPD frameworks. The components included occlusal rest, clasp, lingual bar, polymeric retention framework and maxillar y major connector. The design procedure for the components was as following： first, determine the outline of the component. Second, build the tissue surface of the component using the scanned data within the outline. Third, preset cross section was used to produce the polished surface. Finally, different RPD components were modeled respectively and connected by minor eonnectors to form an integrated RPD framework. The finished data were imported into a selfdeveloped selective laser melting （SLM） machine and metal frameworks were fabricated directly. Results RPD frameworks for the two scanned dental casts were modeled with this self-developed program and metal RPD frameworks were successfully fabricated using SLM method. The finished metal frameworks fit well on the plaster models. Conclusions The self-developed computer aided design and computer aided manufacture（ CAD-CAM ） system for RPD design and fabrication has completely independent intellectual property rights. It provides a new method of manufacturing metal RPD frameworks.

关 键 词：计算机辅助设计 义齿 局部 可摘 快速制造 

分 类 号：R783.6[医药卫生—口腔医学]