Qasim Saad, Ramakrishnaiah Ravikumar, Alkheriaf Abdulaziz Abdullah, Zafar Muhammad S
Materials Science and Engineering Department, Kroto Research Institute, University of Sheffield, Sheffield, UK.
Dental Health Department, College of Applied Medical Science, King Saud University, Riyadh, Saudi Arabia.
Technol Health Care. 2016;24(2):153-61. doi: 10.3233/THC-151101.
Bleaching agents are commonly used in dentistry for treating the discolored teeth. A number of biomaterials and methods are in clinical applications.
The major aim of this study was to evaluate the effects of two different bleaching agents on the surface roughness properties of dental resin nanocomposites and dental porcelains using various regimes.
This study was conducted using direct restorative hybrid and nanocomposite materials and dental porcelains. The specimens were treated using the bleaching gels [(Opalescence Boost 40% OP) and (Whiteness HP 35% WHP)] for 30, 45, 60 and 120 minutes respectively. Treated samples were analyzed for surface roughness properties using contact mode surface profilometry and surface topography using scanning electron microscopy (SEM). Data was analyzed statistically using analysis of variance (ANOVA).
There were no significant changes observed in the roughness of nanofill, nanohybrid composites and ceramic materials compared to microhybrid resin composites (p> 0.05). The SEM photomicrographs confirmed the results of the profilometer showing slight changes in the microhybrid resin composite.
No remarkable difference was observed between the bleaching agents (Opalescence Boost and Whiteness HP Blue) for the surface roughness of tested dental materials. The bleaching agents can be used without harming the ceramic, nanofilled or nanohybrid resin restorations. However, if microhybrid or microfilled composite restorations are present in the oral cavity, bleaching may damage the surface finish and requiring replacement of restorations.
漂白剂在牙科中常用于治疗牙齿变色。许多生物材料和方法已应用于临床。
本研究的主要目的是评估两种不同的漂白剂在不同使用方式下对牙科树脂纳米复合材料和牙瓷表面粗糙度特性的影响。
本研究使用直接修复用混合材料、纳米复合材料和牙瓷进行。分别使用漂白凝胶[(皓齿美白凝胶40% OP)和(美白HP 35% WHP)]对样本进行30、45、60和120分钟的处理。使用接触式表面轮廓仪分析处理后样本的表面粗糙度特性，并使用扫描电子显微镜(SEM)分析表面形貌。数据采用方差分析(ANOVA)进行统计学分析。
与微混合树脂复合材料相比，纳米填料、纳米混合复合材料和陶瓷材料的粗糙度没有显著变化(p>0.05)。SEM显微照片证实了轮廓仪的结果，显示微混合树脂复合材料有轻微变化。
对于测试牙科材料的表面粗糙度，两种漂白剂(皓齿美白凝胶和美白HP蓝色)之间未观察到显著差异。这些漂白剂可在不损害陶瓷、纳米填充或纳米混合树脂修复体的情况下使用。然而，如果口腔中存在微混合或微填充复合修复体，漂白可能会损害表面光洁度，需要更换修复体。
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