Int J Prosthodont. 2021 Jan-Feb;34(1):61-69. doi: 10.11607/ijp.6443.
To compare the marginal and internal gap values of different types of ceramic crowns fabricated based on digital and conventional impression methods.
Ten noncarious extracted human teeth were prepared, and 60 restorations were made using six different impression and fabrication methods. Silicone replicas were obtained for marginal and internal gap evaluation. Statistical analyses were performed using Mann-Whitney U and Kruskal-Wallis tests (P < .05).
Statistically significant differences were found among various impression and fabrication methods. The smallest gap value was shown by the monolithic zirconia indirect digital scanning group (31.13 μm), and the largest for the lithium disilicate indirect digital scanning group (90.09 μm).
The marginal and internal gap values of the restorations in the present study were 31.13 to 90.09 μm. The marginal and internal discrepancies of the tested materials were considered clinically acceptable.
比较基于数字和传统印模方法制作的不同类型陶瓷冠的边缘和内部间隙值。
预备 10 颗无龋人离体牙，使用 6 种不同的印模和制作方法制作 60 个修复体。获取硅橡胶印模用于评估边缘和内部间隙。使用曼-惠特尼 U 检验和克鲁斯卡尔-沃利斯检验进行统计学分析（P＜0.05）。
各种印模和制作方法之间存在显著差异。整体氧化锆直接数字扫描组的间隙值最小（31.13μm），而硅酸锂间接数字扫描组的间隙值最大（90.09μm）。
本研究中修复体的边缘和内部间隙值为 31.13μm 至 90.09μm。测试材料的边缘和内部差异被认为是临床可接受的。
