Digitalization and application of dental diagnosis and treatment record

我们已经开发了牙列研究模型的数字化系统，该系统采用直线激光和CCD相机，可在计算机图形上选择性地测量解剖特征点的距离，并可对扫描区域进行聚焦，提高测量精度，并为部分牙科CAD/CAM系统提供数据。然而，所公布的数据仅用于冠的设计，无法对牙槽嵴切下区域、近端区域等进行数字化处理。因此，我们开发了另一个原型系统，配备了两个线激光器，一个CCD摄像机，并增加了工作台的轴驱动。我们已经发现这个原型不能丢失任何牙齿模型的数据。此外，由于该系统可用于对镶嵌修复模型等可选小区域进行数字化，因此在本研究中，我们开发了用于牙科教育的自动叠加软件，并评估了主模型与学生准备模型之间不同准备模型的一致性。新开发的数字化软件可复制牙列研究模型，并自动叠加两种不同的数据来评估牙科准备实践。其他机构开发的其他系统在数字化模型之前需要使用固定夹具来保持坐标轴。而使用该软件，在不受坐标轴影响的情况下，可以自动识别和叠加各个模型的三维形态。因此，本软件能够减少模型数字化时的限制。

We already developed the digitizing system for the dentition study model using a line laser and CCD camera, which was available for measuring the distance of anatomical characteristic points on the computer graphics optionally and could focus the scanning area to progress the measuring accuracy and release data for a part of the dental CAD/CAM system. However, the released data was only available for the design of crowns, and not available for digitizing the under cut area of alveolar ridge, proximal area, and etc. Therefore, we have developed another prototype system, equipping two line lasers, one CCD camera, and additional axis drive of working stage. We already found this prototype could not lose any data for a dentition model. Moreover, since this system was available for digitizing the optionally small area like an inlay restoration model, in this study, we developed automatically superimposing software for dental education and evaluated the conformity of different preparation models between the master model and the student prepared model.Newly developed digitizing software was available to reproduce the dentition study models and automatically superimpose the two kinds of different data to evaluate the dental preparation practice. Other systems developed by other institutions were necessary to keep the axis of coordinates using a fixing jig before digitizing the model. However, using this software, three-dimensional form of each model was recognized and superimposed automatically without influenced by the axis of coordinates. Therefore, the present software was able to reduce the restrictions at the time of model digitizing.