Makkeyah Fatma, Elsahn Nesrine A, Bakr Mahmoud M, Al Ankily Mahmoud
Fixed Prosthodontics Department, Faculty of Dentistry, The British University in Egypt, Cairo, Egypt.
Department of Clinical Sciences, College of Dentistry, Ajman University, Ajman, United Arab Emirates.
Eur J Dent. 2025 Feb;19(1):173-179. doi: 10.1055/s-0044-1786842. Epub 2024 May 22.
The aim of this study was to determine the effect of two acidic beverages (orange juice and HPO-containing fizzy drink) on the surface topography and color stability of two commonly used computer-aided design/computer-aided manufacturing (CAD/CAM) ceramic materials.
Sixty samples of two CAD/CAM ceramic materials, lithium disilicate (IPS e-max CAD) and zirconia reinforced lithium silicate (Vita Suprinity), were prepared according to the manufacturer's instructions. The samples were immersed in one of three media (artificial saliva, orange juice and HPO-containing fizzy drink) and then stored in an incubator at 37 °C for 24 hours). Before and after immersion in different media, the surface roughness (Ra) of the samples was assessed using profilometer (JITAI8101 Surface Roughness Tester-Beijing Jitai Tech Detection Device Co. Ltd, China) and the color parameters were measured using VITA Easyshade Advance 4.01 (VITA shade, VITA made, VITA). Surface topography was observed using scanning electron microscope (SEM) and surface mineral content was compared before and after immersion. Paired sample -test was used to determine the change in Ra before and after immersion. Two-way analysis of variance was used to determine the effect of different CAD/CAM materials and immersion media on the mean ∆Ra and mean ∆E of the studied groups. Tukey's honest significant difference posthoc test was used for multiple comparisons at a level of significance (α = 0.05).
A significant increase in Ra and a decrease in the color stability of the two investigated ceramic materials were detected after immersion in the acidic media than in artificial saliva. SEM and energy-dispersive X-ray results revealed the dissolution of the glassy matrix and the exposure of silicate crystals.
The surface topography and color stability of glass ceramics are affected by the pH of different acidic media.
本研究旨在确定两种酸性饮料（橙汁和含HPO的碳酸饮料）对两种常用的计算机辅助设计/计算机辅助制造（CAD/CAM）陶瓷材料的表面形貌和颜色稳定性的影响。
按照制造商的说明制备了两种CAD/CAM陶瓷材料（二硅酸锂（IPS e-max CAD）和氧化锆增强硅酸锂（Vita Suprinity））的60个样本。将样本浸入三种介质之一（人工唾液、橙汁和含HPO的碳酸饮料）中，然后在37°C的培养箱中储存24小时。在浸入不同介质之前和之后，使用轮廓仪（JITAI8101表面粗糙度测试仪 - 北京吉泰科技检测设备有限公司，中国）评估样本的表面粗糙度（Ra），并使用VITA Easyshade Advance 4.01（VITA色度，VITA制造，VITA）测量颜色参数。使用扫描电子显微镜（SEM）观察表面形貌，并比较浸入前后的表面矿物质含量。采用配对样本t检验确定浸入前后Ra的变化。使用双向方差分析确定不同CAD/CAM材料和浸入介质对研究组的平均∆Ra和平均∆E的影响。使用Tukey诚实显著差异事后检验在显著性水平（α = 0.05）下进行多重比较。
与人工唾液相比，两种被研究的陶瓷材料浸入酸性介质后，Ra显著增加，颜色稳定性降低。SEM和能量色散X射线结果显示玻璃基质溶解，硅酸盐晶体暴露。
玻璃陶瓷的表面形貌和颜色稳定性受不同酸性介质pH值的影响。
