Besimo C, Jeger C, Guggenheim R
Department of Prosthodontics, School of Dentistry, University of Basle, Switzerland.
Int J Prosthodont. 1997 Nov-Dec;10(6):541-6.
This study evaluated the Digitizing Computer System (DCS Production) for computer-controlled fabrication of titanium copings. The three-dimensional shape of the crown preparations was acquired through micropalpation with a contact digitizer on the master cast. In this in vitro study the marginal fit of computer-machined titanium frameworks for veneered crowns was assessed using scanning electron microscopy. Measurement of the marginal gap between the framework and the tooth was performed along the entire length of the finish line. The evaluation was based on 1,475 individual measurements on 10 test specimens. The mean values of marginal fit for the individual crowns ranged from 21.2 +/- 14.6 microns to 81.6 +/- 25.1 microns. The mean value for all crowns was 47.0 +/- 31.5 microns.
本研究评估了用于计算机控制制作钛基底冠的数字化计算机系统（DCS 生产）。通过在工作模型上使用接触式数字化仪进行微触诊来获取牙冠预备体的三维形状。在这项体外研究中，使用扫描电子显微镜评估了用于贴面冠的计算机加工钛支架的边缘适合性。沿着完成线的全长测量支架与牙齿之间的边缘间隙。该评估基于对 10 个测试样本的 1475 次单独测量。各个牙冠边缘适合性的平均值范围为 21.2±14.6 微米至 81.6±25.1 微米。所有牙冠的平均值为 47.0±31.5 微米。
