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非接触・高速・高精度3次元形状計測システムによる歯科矯正治療の客観的評価

使用非接触式、高速、高精度3D形状测量系统客观评估正畸治疗

基本信息

批准号：
07407061
负责人：
ISHIKAWA Haruo
金额：
$ 2.24万
依托单位：
The Nippon Dental University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1997
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07407061/
关键词：
computer computer aided design non-contact 3D shape measuring system blind region curve of Spee orthodontics dental occlusion 正常咬合者 FA point CAD 非接触3次元形状計測システム矯正用診断模型測定精度石膏試験球

项目摘要

The purpose of this study was to develop a quantitative and three-dimensional analyzing system for orthodontic diagnostic casts. From this research project, the following results were obtained.1. The optical three-dimensional measuring system consisted of an optical scanning unit with a semiconductor laser, two CCD cameras, and a processing workstation running CAD software on a local area network. The blind region was eliminated.2. This system was superior to other systems in processing speed and reliability of three-dimensional surface image reconstruction.3. The accuracy of the system was evaluated using a stone plate and spheres. Maximum error was approximately 100 microns.4. Thirty subjects with ideal Class I occlusions were selected from a total population of 3,500 Nippon Dental University students and staff. The vertical relationships of the FA points were computed and evaluated. The FA points in a dental arch do not fall on a common plane, therefore, they are not reliable reference points in assessing vertical dimensions in normal occlusions.5. The curves of Spee of these subjects were flatter than previous measurements in investigations of Japanese normal occlusions.6. The fourth order polynomial curve was found to be suitable for analyzing both upper and lower arches.7. The system exhibited clinically acceptable accuracy for obtaining orthodontic diagnostic CAD models in ICP.In conclusion, the results of this study indicated that the system utilized in this investigation demonstrated clinically acceptable reliability and may provide practical applicability for the field of orthodontics.

本研究的目的是为正畸诊断铸型建立一个定量的三维分析系统。从这个研究项目中，得到了以下结果：该光学三维测量系统由一个带半导体激光器的光学扫描单元、两个CCD摄像机和一个在局域网上运行CAD软件的处理工作站组成。消除了盲区。该系统在三维表面图像重建的处理速度和可靠性方面优于其他系统。用石板和球对系统的精度进行了评价。最大误差约为100微米。从日本牙科大学3500名学生和工作人员中选择30名具有理想I类咬合的受试者。计算并评价FA点的垂直关系。牙弓的FA点不在同一平面上，因此，在评估正常咬合的垂直尺寸时，它们不是可靠的参考点。这些受试者的Spee曲线比以往在日本正常咬合调查中测量的曲线更平坦。发现四阶多项式曲线对上拱和下拱均适用。该系统在获得ICP正畸诊断CAD模型方面具有临床可接受的准确性。综上所述，本研究的结果表明，本研究使用的系统具有临床可接受的可靠性，可以为正畸学领域提供实际应用。