Private Practitioner in Dentistry, Tehran, Iran.
School of Dentistry, Department of Operative Dentistry, Dental Research Center, Dentistry Research Institute, Tehran University of Medical Sciences, Tehran, Iran.
Minerva Dent Oral Sci. 2023 Feb;72(1):24-30. doi: 10.23736/S2724-6329.21.04613-1.
Recently, the use of whitening dentifrice has increased among patients. However, these products might increase the surface roughness of composite restorations and make them more susceptible to discoloration and plaque accumulation. This study aimed to compare the effects of two charcoal-based dentifrices and other whitening dentifrices with different mechanisms of action on the surface roughness of an aged resin composite.
Forty-five composite specimens were made (2 × 7mm) and their initial surface roughness was obtained using a Profilometer. The specimens were subjected to the Accelerated Artificial Aging (AAA) process for 300 hours. Then, the surface roughness of the specimens was reevaluated using the Profilometer. The specimens were randomly divided into 5 groups (N.=9), namely Control (Gc), Bencer (Gb; Sormeh Company, Tehran, Iran), Perfect White Black (Gp), Colgate Total Whitening (Gt), and Colgate Optic White (Go) (Colgate-Palmolive Company, New York, NY, USA). The specimens were brushed for 14 minutes with respective dentifrices. In the Gc group, the specimens were only brushed with distilled water. The surface roughness of the specimens was measured again. The data were analyzed using repeated measure ANOVA at a significance level of 0.05.
There was no significant difference in surface roughness parameters (Ra, Rq, Rz) between the groups, but in each group, the roughness parameters decreased after the aging procedure and increased after brushing significantly except for Rz parameter in Gb group which increased after aging and decreased after brushing.
None of the whitening dentifrices used in the present study had an adverse effect on the surface roughness of an aged composite resin.
最近，患者中使用美白牙膏的情况有所增加。然而，这些产品可能会增加复合修复体的表面粗糙度，使它们更容易变色和菌斑堆积。本研究旨在比较两种基于活性炭的牙膏和其他具有不同作用机制的美白牙膏对老化树脂复合材料表面粗糙度的影响。
制作了 45 个复合试件（2×7mm），用轮廓仪获得其初始表面粗糙度。将试件进行加速人工老化（AAA）处理 300 小时。然后，用轮廓仪重新评估试件的表面粗糙度。将试件随机分为 5 组（N=9），分别为对照组（Gc）、Bencer（Gb；Sormeh 公司，德黑兰，伊朗）、完美白黑（Gp）、高露洁全效美白（Gt）和高露洁皓清（Go）（高露洁棕榄公司，纽约，NY，美国）。用相应的牙膏对试件进行 14 分钟的刷洗。在 Gc 组中，试件仅用蒸馏水刷洗。再次测量试件的表面粗糙度。使用重复测量方差分析，在 0.05 的显著性水平下对数据进行分析。
各组表面粗糙度参数（Ra、Rq、Rz）无显著差异，但在每个组中，老化程序后粗糙度参数降低，刷洗后显著增加，除 Gb 组的 Rz 参数在老化后增加，刷洗后降低。
本研究中使用的美白牙膏对老化复合树脂的表面粗糙度没有不良影响。
