Barbosa Carolina Meneghin, Scatolin Renata Siqueira, Vieira-Junior Waldemir Francisco, Tanaka Marcia Hiromi, Ferraz Laura Nobre
Hermínio Ometto Foundation, University of Araras, Araras, SP, Brazil.
São Leopoldo Mandic Institute and Dental Research Center, Campinas, SP, Brazil.
Restor Dent Endod. 2023 Jul 26;48(3):e26. doi: 10.5395/rde.2023.48.e26. eCollection 2023 Aug.
This study aimed to evaluate the effects of different whitening toothpastes on a composite resin during at-home bleaching with 10% carbamide peroxide.
Sixty samples (7 mm × 2 mm) were used for color and roughness analyses, while another 60 samples (3 mm × 2 mm) were utilized to assess microhardness. The factors analyzed included toothpaste, for which 5 options with varying active agents were tested (distilled water; conventional toothpaste; whitening toothpaste with abrasive agents; whitening toothpaste with abrasive and chemical agents; and whitening toothpaste with abrasive, chemical, and bleaching agents). Brushing and application of whitening gel were performed for 14 days. Surface microhardness (SMH), surface roughness (Ra), and color (∆L*, ∆a*, ∆b, ∆E*, and ∆E) were analyzed. The Ra and SMH data were analyzed using mixed generalized linear models for repeated measures, while the color results were assessed using the Kruskal-Wallis and Dunn tests.
Between the initial and final time points, all groups demonstrated significant increases in Ra and reductions in SMH. No significant differences were found between groups for SMH at the final time point, at which all groups differed from the distilled water group. Conventional toothpaste exhibited the lowest Ra, while whitening toothpaste with abrasive agent had the highest value. No significant differences were observed in ∆L*, ∆a*, and ∆b.
While toothpaste composition did not affect the color stability and microhardness of resin composite, combining toothbrushing with whitening toothpaste and at-home bleaching enhanced the change in Ra.
本研究旨在评估不同美白牙膏在使用10%过氧化脲进行家庭漂白期间对复合树脂的影响。
60个样本（7毫米×2毫米）用于颜色和粗糙度分析，另外60个样本（3毫米×2毫米）用于评估显微硬度。分析的因素包括牙膏，测试了5种含有不同活性剂的牙膏（蒸馏水；传统牙膏；含研磨剂的美白牙膏；含研磨剂和化学剂的美白牙膏；以及含研磨剂、化学剂和漂白剂的美白牙膏）。刷牙和涂抹美白凝胶持续14天。分析表面显微硬度（SMH）、表面粗糙度（Ra）和颜色（∆L*、∆a*、∆b、∆E*和∆E）。使用重复测量的混合广义线性模型分析Ra和SMH数据，而颜色结果使用Kruskal-Wallis和Dunn检验进行评估。
在初始和最终时间点之间，所有组的Ra均显著增加，SMH均降低。在最终时间点，各实验组之间的SMH无显著差异，但所有实验组与蒸馏水组不同。传统牙膏的Ra最低；含研磨剂的美白牙膏的Ra最高。在∆L*、∆a*和∆b方面未观察到显著差异。
虽然牙膏成分不影响树脂复合材料的颜色稳定性和显微硬度，但刷牙联合使用美白牙膏和家庭漂白可增强Ra的变化。
