AlHabdan AlHanouf, Alsuhaibani Amal, Alomran Lama, Almutib Lulwah
Department of Restorative Dental Sciences, King Saud University, Riyadh, Saudi Arabia.
College of Dentistry, King Saud University, Riyadh, Saudi Arabia.
Clin Cosmet Investig Dent. 2025 Jan 6;17:1-12. doi: 10.2147/CCIDE.S494320. eCollection 2025.
This study evaluated the color stability and surface roughness of two universal-shade compared to two nanohybrid composites after staining and external bleaching with 40% hydrogen peroxide.
Two universal shade resin-based composites and two nanohybrid composites were tested. Twenty disc-shaped specimens from each material were fabricated and divided into two subgroups: one group was stained and bleached (staining group) and the other received bleaching treatment only (control group). The staining group was stained with coffee solution for 24 h. Subsequently, each sample of all four materials was bleached using an in-office bleaching gel using 40% hydrogen peroxide. Color measurements were performed using a spectrophotometer to obtain the International Commission on Illumination parameters, L*; a*; and b* for each of the following periods: baseline, after bleaching, and two weeks after bleaching for the control group. The staining group was examined at baseline, after staining, after bleaching, and two weeks after bleaching. Surface roughness (Ra) of all the materials after each treatment step were also recorded. The data was statistically analyzed using SPSS 26.0 statistical software. Changes were considered statistically significant at P = 0.05.
Descriptive statistics (means and standard deviations) were used to describe color measurements and surface-roughness values. Two-analysis of variance and one-way analysis of variance were used to compare the mean values of surface roughness, Lab*and ΔE values. Statistically significant differences and clinically acceptable ΔE were observed between all materials during the different stages in color measurements, whereas the surface roughness was significantly different for each study material and treatment mode.
Staining with coffee solution and external bleaching produced acceptable color changes for all materials tested. Staining and bleaching increased the surface roughness values of the tested resin-based composites.
本研究评估了两种通用色阶复合材料与两种纳米混合复合材料在经40%过氧化氢染色和外部漂白后的颜色稳定性及表面粗糙度。
测试了两种通用色阶树脂基复合材料和两种纳米混合复合材料。每种材料制备20个圆盘形试件，并分为两个亚组：一组进行染色和漂白（染色组），另一组仅接受漂白处理（对照组）。染色组用咖啡溶液染色24小时。随后，所有四种材料的每个样本均使用含40%过氧化氢的诊室漂白凝胶进行漂白。使用分光光度计进行颜色测量，以获取以下各阶段的国际照明委员会参数L*、a和b：基线、漂白后以及对照组漂白后两周。染色组在基线、染色后、漂白后以及漂白后两周进行检查。还记录了每个处理步骤后所有材料的表面粗糙度（Ra）。使用SPSS 26.0统计软件对数据进行统计分析。P = 0.05时，变化被认为具有统计学意义。
使用描述性统计（均值和标准差）来描述颜色测量值和表面粗糙度值。采用双因素方差分析和单因素方差分析来比较表面粗糙度、Lab*和ΔE值的均值。在颜色测量的不同阶段，所有材料之间均观察到具有统计学意义的差异以及临床上可接受的ΔE，而每种研究材料和处理方式的表面粗糙度存在显著差异。
用咖啡溶液染色和外部漂白对所有测试材料均产生了可接受的颜色变化。染色和漂白增加了测试树脂基复合材料的表面粗糙度值。
