权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

CAD/CAM System for Dental Prostheses

牙科修复体 CAD/CAM 系统

基本信息

批准号：
01870082
负责人：
TSUTSUMI Sadami
金额：
$ 9.28万
依托单位：
Kyoto University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research (B).
财政年份：
1989
资助国家：
日本
起止时间：
1989 至 1990
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-01870082/
关键词：
Dental Prostheses CAD CAM System 3-D Surface Shape Measurement Design of Dental Crowns Voxel Modelling Boundary Problem Machinability Coded Pattern Projection Method CAD@CAMシステム歯冠形態設算

项目摘要

The purpose of this research project has been to develop a practical CAD/CAM (computer-aided-design/-manufacturing) for dental prostheses. The results obtained in these two years were as follows ;1. A rapid 3-D data acquisition system for teeth and alveolar ridges based on a coded pattern projection method was developed using 8 patterns through a liquid crystal screen regulated by a personal computer and high resolution CCD camera. And, another 3-D measuring system using multiple laser slits were developed for maxilo-facial shape measurements.2. The numerical data can be reorganized as 3-D images quickly by a voxel modeling. The software for automatic detection of margin lines between teeth and crowns and local shape modification were developed.3. The design of crown can be easily carried out through automatic adaptation process from our data base of standard teeth shapes within several regulations indicated by few characteristic points of adjacent teeth.4. In order to construct and search a big amount of the graphic data base such as patients' images and designs of prostheses efficiently, an optical-magnetic disc system was set up with a personal computer.5. A 3-axis micro-milling machine controlled by any personal computer was developed for small dental prostheses. The rigidity and accuracy of the machine was designed to be suitable for milling of titanium alloys, glass-ceramics and/or composite resins.6. As new dental prosthetic materials, titanium alloys, a calciummica glass-ceramic and a micro-filler composite resin which have good biocompatibility and poor castability were developed to improve in good machinability and toughness. A new machinability tester was also developed to know the best milling conditions of the materials.

本研究项目的目的是开发一种实用的牙修复体CAD/CAM(计算机辅助设计/制造)。1.研制了一套基于编码模式投影法的牙齿和牙槽骨三维数据快速采集系统，该系统采用8种模式，通过PC机和高分辨率CCD摄像机调节液晶屏，实现了牙齿和牙槽骨的快速三维数据采集。并研制了用于颌面部外形测量的多激光狭缝三维测量系统。通过体素建模可以将数值数据快速重组为3-D图像。开发了牙冠边缘线自动检测和局部修形的软件。在相邻牙齿特征点较少的几个规则范围内，通过我们的标准牙形数据库的自动适配过程，可以方便地进行牙冠的设计。为了高效地构建和检索患者图像、假体设计等海量图形数据库，建立了基于PC机的光磁盘系统。研制了一种适用于小型牙体修复体的三轴微型磨床，可由任意个人计算机控制。该机床的刚性和精度设计为适合钛合金、微晶玻璃和/或复合树脂的铣削。作为新型牙科修复材料，钛合金、钙云母微晶玻璃和微填充复合树脂具有良好的生物相容性和较差的铸造性能，以改善其良好的加工性和韧性。还开发了一种新的可加工性测试仪，以了解材料的最佳铣削条件。