A STUDY OF CLINICAL APPLICATION OF DENTAL CAD/CAM SYSTEM

应用CAD/CAM系统进行了临床应用，并对系统进行了评价。在对位牙的测量中，对位牙用唯一的黑色咬合材料描述。而设计皇冠的危险在于，当测量到这一点时，它从模型中略微突出，并高于实际情况。认为在此基础上，还必须考察直接拮抗牙齿模型的测量。该CAD软件越来越实用的加工数据，以及在短短10~20分钟内容易进行的细节设计，将在15~20分钟内自动完成。处理时间几乎在60分钟内完成。而且，这个问题在临床上也可能是非常有效的，而不需要识别特殊的基牙安装条件。利用基牙的测量数据，对牙冠厚度进行连续测量，并对牙冠厚度、牙冠厚度、中远中轴面倾斜角和颊舌侧轴面倾斜角进行测量，以应用于1998年的牙科教学。在CAD软件的菜单中，成形后有一个自动检查设计牙冠厚度的功能，首先输入牙冠厚度的参考值，这次应用该功能的基牙数据牙冠外表数据参考值屏幕，并将以前形成的三聚氰胺牙的数据登记为牙冠数据。通过与基牙数据的比较，测量牙冠厚度的缺失量。在宏观上，目前的评价方法判定结果为：缺失范围小、判定困难的缺失也自动成为可能，且超过半数的成形基牙缺失不足。

The clinical application was carried out using CAD/CAM systems for crown, and the evaluation of the system was examined. In the measurement of antagonistic tooth, the antagonistic tooth was described by the exclusive black occlusion material. And there was the danger which had designed the crown that it slightly stands out from the model and is higher than the practice, when this was measured. It is considered that on this, it must be also examined that the direct antagonistic tooth model is measured. The data for the processing in which that CAD software becomes more and more practical, and that moreover, the design in the detail easily does it in the short time of 10-20 minutes would be possible was automaticaliy made in 15〜20 minutes. The processing time finished within 60 minutes almost. And, the problem might be also clinically very effective without recognizing especialiy, abutment tooth mounting condition. Using measured data of the abutment tooth, thickness of the crown was continuously measured in addition to each facing tilt angle of meslal-distal axial surface and buccal-lingual side axial surface as an application to the dentistry education in 1998. In the menu of the CAD software, after the formation there is a function which automatically checks the thickness of designed crown, and first the reference value of the thickness of the crown is input, and this function is applied this time abutment tooth data crown external form data reference value screen, and the data of melamine tooth In the before formed as a crown data is registered. Deletion quantity of thickness of the crown was measured by the comparison with the abutment tooth data. In the macroscope, by present evaluation method, It was judged as the result, that the decision became also automatically possible on the deletion shortage of small range with the difficult decision and that the over half of formed abutment tooth is insufficient in the deletion.