Ozdogan Alper, Kaya Nihan
Department of Prosthodontics, Faculty of Dentistry, Atatürk University, Erzurum, Turkey.
Department of Prosthodontics, Faculty of Dentistry, Giresun University, Giresun, Turkey.
J Dent Res Dent Clin Dent Prospects. 2022 Fall;16(4):251-257. doi: 10.34172/joddd.2022.040. Epub 2022 Dec 30.
Aesthetic expectations have increased the use of aesthetic materials in dentistry. Lithium disilicates are frequently used materials for these expectations. Bleaching is another method used to provide aesthetics. Bleaching processes on restorative materials are not fully known. This study investigated the effect of at-home and in-office bleaching methods on the color change, surface roughness, and topography of lithium disilicate glass-ceramic materials produced with two different techniques and subjected to different polishing procedures.
A total of 144 disc-shaped pressed and computer-aided design (CAD) lithium disilicate glass-ceramic specimens were randomly divided into four groups. Glazing and three different chair-side polishing procedures were performed. The specimens in each group were randomly divided into two groups and subjected to at-home and in-office bleaching processes (n=9). The home bleaching process was repeated with 16% carbamide peroxide agent for six hours for seven days, while the in-office bleaching process was applied with 40% hydrogen peroxide agent for two sessions of 20 minutes. After the bleaching processes, the final color and surface roughness experiments of the specimens were carried out, and the results were recorded. ANOVA and Tukey multiple comparison tests were used FOR the statistical analysis of the data (α=0.05).
The materialpolishbleaching, polishbleaching, materialbleaching, and material*polishing interactions were not statistically significant regarding color and roughness changes of both specimens (>0.05).
Both bleaching processes can be safely applied to lithium disilicate glass-ceramic materials.
美学期望增加了牙科美学材料的使用。二硅酸锂是常用于满足这些期望的材料。漂白是另一种用于实现美学效果的方法。关于修复材料上的漂白过程尚未完全了解。本研究调查了家庭和诊室漂白方法对采用两种不同技术生产并经过不同抛光程序的二硅酸锂玻璃陶瓷材料的颜色变化、表面粗糙度和形貌的影响。
总共144个圆盘形压制和计算机辅助设计（CAD）的二硅酸锂玻璃陶瓷试样被随机分为四组。进行了上釉和三种不同的椅旁抛光程序。每组中的试样被随机分为两组，并进行家庭和诊室漂白过程（n = 9）。家庭漂白过程使用16%的过氧化脲剂重复进行六小时，共七天，而诊室漂白过程使用40%的过氧化氢剂进行两 sessions，每次20分钟。漂白过程后，对试样进行最终颜色和表面粗糙度实验，并记录结果。使用方差分析和Tukey多重比较检验对数据进行统计分析（α = 0.05）。
对于两种试样的颜色和粗糙度变化，材料抛光漂白、抛光漂白、材料漂白和材料*抛光的相互作用在统计学上不显著（>0.05）。
两种漂白过程都可以安全地应用于二硅酸锂玻璃陶瓷材料。
