Ghajari Masoud Fallahinejad, Shamsaei Maryam, Basandeh Kimia, Galouyak Maedeh Sadeghpour
Department of Pediatric Dentistry, Dental Research Center, Research Institute of Dental Sciences, Dental School, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
Department of Pediatric Dentistry, Dental School, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
Dent Res J (Isfahan). 2021 Jul 19;18:51. eCollection 2021.
Charcoal toothpastes can whiten teeth through abrasion. The purpose of this study was to determine the level of whitening and abrasiveness of charcoal toothpastes in permanent teeth.
In this study, 30 premolars were polished, sectioned, mounted, and stored for 5 days in a coffee solution at 37°C. The color and surface profile of the teeth were measured by spectrophotometry and a profilometric device, respectively. The specimens were divided into 3 groups of 10 and were brushed 2000 times (equivalent to 3 times a day for 1.5 months) in a brushing machine using 20 g of each toothpaste (Bencer, Beverly, and Colgate) mixed with 40 ml of distilled water. The color and surface profile were remeasured. Bonferroni test and repeated measures analysis of variance (ANOVA) were used to examine the abrasion. One-way ANOVA was used to assess the whitening.
The three toothpastes caused changes in the surface profile ( = 0.0001). ΔE was equal to 3.3 (within the acceptable range) in all groups (95% confidence interval). There was no significant difference in abrasion ( > 0.05) and color change ( = 0.884) among toothpastes.
The results of this study showed that all the three used toothpastes have the abrasive and whitening effect on the samples significantly. The differences between the toothpastes were not significant.
炭牙膏可通过磨损使牙齿美白。本研究的目的是确定炭牙膏对恒牙的美白程度和磨损性。
在本研究中，30颗前磨牙经过打磨、切片、安装，并在37°C的咖啡溶液中储存5天。分别通过分光光度法和轮廓仪测量牙齿的颜色和表面轮廓。将标本分为3组，每组10颗，在刷牙机中使用20克每种牙膏（Bencer、Beverly和高露洁）与40毫升蒸馏水混合后刷牙2000次（相当于每天3次，持续1.5个月）。重新测量颜色和表面轮廓。使用Bonferroni检验和重复测量方差分析（ANOVA）来检查磨损情况。使用单因素方差分析来评估美白效果。
三种牙膏均导致表面轮廓发生变化（P = 0.0001）。所有组的ΔE均等于3.3（在可接受范围内）（95%置信区间）。牙膏之间在磨损（P>0.05）和颜色变化（P = 0.884）方面无显著差异。
本研究结果表明，所有三种使用的牙膏对样本均有显著的磨损和美白效果。牙膏之间的差异不显著。
