School/Hospital of Stomatology, Zhejiang Chinese Medical University.
Stomatology Hospital of Zhejiang Chinese Medical University.
Dent Mater J. 2022 May 31;41(3):363-367. doi: 10.4012/dmj.2021-236. Epub 2022 Jan 29.
This study evaluated the 3-dimensional (3D) fit of self-glazed zirconia monolithic crowns fabricated by wet deposition, in comparison with milled zirconia and lithium disilicate monolithic crowns. Dual-scan protocol was used to assess the fit of crowns. Root mean squares (RMS) and uniformity index (UI) were calculated to describe the gap size and uniformity. The self-glazed zirconia crowns had significantly lower RMS values for the gaps at axial wall and transition regions than the milled zirconia crowns, and for the gaps at occlusal region than both milled crowns. All 3 types of crowns had comparable RMS values for the gaps at marginal and chamfer regions and comparable UI values for both marginal and internal gaps. The 3D fit of the self-glazed zirconia monolithic crowns was clinically acceptable and they exhibited better fit at occlusal region than the milled crowns.
本研究评估了通过湿沉积法制作的自上釉氧化锆整体冠的三维（3D）适合性，与铣削氧化锆和锂硅二硅酸锂整体冠进行比较。采用双扫描方案评估冠的适合性。均方根（RMS）和均匀性指数（UI）用于描述间隙大小和均匀性。自上釉氧化锆冠在轴壁和过渡区域的间隙的 RMS 值明显低于铣削氧化锆冠，在牙合面区域的间隙的 RMS 值也低于这两种铣削冠。所有 3 种类型的冠在边缘和倒角区域的间隙的 RMS 值相当，在边缘和内部间隙的 UI 值也相当。自上釉氧化锆整体冠的 3D 适合性临床可接受，并且在牙合面区域的适合性优于铣削冠。
