CAD/CAM全瓷冠边缘及内部适合性的体外研究

In vitro study on marginal and internal fit of CAD/CAM all-ceramic crowns.

作者信息

Nakamura Takashi, Tanaka Hideaki, Kinuta Soichiro, Akao Takeshi, Okamoto Kei, Wakabayashi Kazumichi, Yatani Hirofumi

机构信息

Department of Fixed Prosthodontics, Osaka University Graduate School of Dentistry, 1-8 Yamadaoka, Suita, Osaka 565-0871, Japan.

出版信息

Dent Mater J. 2005 Sep;24(3):456-9. doi: 10.4012/dmj.24.456.

DOI:10.4012/dmj.24.456

PMID:16279739

Abstract

The purpose of this study was to evaluate the marginal and internal fit of all-ceramic crowns fabricated using the Decsy CAD/CAM system. A master die of maxillary first premolar was measured, and experimental crowns were fabricated. Four conditions were established by combining two convergence angles (4 degrees and 12 degrees) of the abutment with two different luting space settings (15 microm and 55 microm). The results showed that the experimental crowns had a marginal gap of 42 to 56 microm. When the luting space setting was 15 microm, the internal gap was 85-88 microm; when the setting was 55 microm, the internal gap was 126-138 microm. The marginal gap for each experimental crown met the clinically acceptable criterion.

摘要

本研究的目的是评估使用Decsy CAD/CAM系统制作的全瓷冠的边缘适合性和内部适合性。对上颌第一前磨牙的主模型进行测量，并制作实验性全瓷冠。通过将基牙的两个聚合角（4度和12度）与两种不同的粘结剂间隙设置（15微米和55微米）相结合，建立了四种情况。结果显示，实验性全瓷冠的边缘间隙为42至56微米。当粘结剂间隙设置为15微米时，内部间隙为85 - 88微米；当设置为55微米时，内部间隙为126 - 138微米。每个实验性全瓷冠的边缘间隙均符合临床可接受标准。