Prosthetic Department, College of Dentistry, King Khalid University, Abha, Kingdom of Saudi Arabia.
Applied Medical Sciences College, King Khalid University, Abha, Kingdom of Saudi Arabia.
BMC Oral Health. 2021 Aug 30;21(1):422. doi: 10.1186/s12903-021-01770-2.
The purpose of this study evaluates and compares the effect of surface roughness (Ra) and color stability on computer-aided design/computer-aided manufacturing (CAD/CAM) hybrid resin (Vita Enamic), feldspathic (Vitablocs® Mark II), and lithium disilicate Zirconia (Vita Suprinity) glazed or polished ceramics immersed in hot Arabic Qahwa and cold coffee.
A total of 96 standardized samples were prepared from CAD/CAM restorative materials. Half of the samples were polished as per the manufacturer's instructions using a porcelain polishing kit, and the other half were glazed. Samples were distributed and immersed in hot Arabian Qahwa and cold coffee followed by thermocycling. Ra measurements and color changes were conducted before and after immersion. SEM images were captured from each type of glazed or polished ceramic. One-way ANOVA paired Student's t-test, and Bonferroni test were conducted to detect significant difference between the groups. P > 0.05 was a significant level.
Of all the tested samples, Ra increased without any significant difference; however, mean color changes (ΔE*) showed significant differences. An increase in Ra was noted for all the glazed and polished samples after immersion and thermocycling. However, differences were significant only in VM II. In addition, ΔE* was significant only in Vita Suprinity (VS) samples. For immersion groups, significant Ra changes were noticed in glazed samples, only in Vita Enamic (VE) with no ΔE*. In polished samples, mean Ra changes were observed in VM II and VS samples. Significant differences were also noticed in polished VE and VS subgroups of ΔE*.
Ra affects all the tested samples, providing higher values on the polished specimens. The ΔE* caused by hot Arabic Qahwa and cold coffee on glazed or polished CAD/CAM restorative materials were clinically acceptable.
本研究旨在评估和比较表面粗糙度（Ra）和颜色稳定性对计算机辅助设计/计算机辅助制造（CAD/CAM）混合树脂（Vita Enamic）、长石质（Vitablocs® Mark II）和锂二硅酸锆（Vita Suprinity）上釉或抛光陶瓷在热阿拉伯 Qahwa 和冷咖啡中的影响。
从 CAD/CAM 修复材料中制备了 96 个标准化样本。一半的样本按照制造商的说明用瓷质抛光套件进行抛光，另一半进行上釉。将样本进行分组并浸入热阿拉伯 Qahwa 和冷咖啡中，然后进行热循环。在浸泡前后进行 Ra 测量和颜色变化。从每种上釉或抛光陶瓷中捕获 SEM 图像。采用单向方差分析配对学生 t 检验和 Bonferroni 检验检测组间差异。P>0.05 为显著水平。
在所测试的所有样本中，Ra 增加但无显著差异；然而，平均颜色变化（ΔE*）显示出显著差异。所有上釉和抛光样本在浸泡和热循环后 Ra 均增加。然而，差异仅在 VM II 中显著。此外，ΔE仅在 Vita Suprinity（VS）样本中显著。对于浸泡组，仅在 Vita Enamic（VE）上釉样本中观察到 Ra 显著变化，无 ΔE。在抛光样本中，VM II 和 VS 样本的平均 Ra 变化明显。在抛光 VE 和 VS 亚组中也观察到 ΔE*的显著差异。
Ra 影响所有测试样本，对抛光样本提供更高的值。热阿拉伯 Qahwa 和冷咖啡对 CAD/CAM 修复材料上釉或抛光的影响导致的 ΔE*在临床可接受范围内。
