Barros Aline da Silva, Barbosa Carolina Meneghin, Scatolin Renata Siqueira, Vieira Junior Waldemir Francisco, Ferraz Laura Nobre
Hermínio Ometto Foundation, University of Araras, Brazil, Araras, Brazil.
Department of Restorative Dentistry, Piracicaba Dental School, University of Campina, Piracicaba, Brazil.
Restor Dent Endod. 2025 Feb;50(1):e6. doi: 10.5395/rde.2025.50.e6. Epub 2025 Feb 26.
This study investigated the effects of different whitening toothpaste (WT) on the surface properties and staining susceptibility of a resin composite.
Cylindrical samples were prepared with a micro-hybrid resin composite and were randomized into groups according to the toothpaste (n = 12): distilled water (DW), regular toothpaste (RT), WT with silica + pyrophosphate (WT-S/P), WT with pentaphosphate and pyrophosphate (WT-P/P), WT with hydrogen peroxide and pyrophosphate (WT-HP/P) and WT with charcoal and pyrophosphate (WT-Ch/P). The samples were brushed for 825 cycles in an automatic brushing machine, simulating 30 days of brushing. After that, an immersion in coffee (10 mL/sample) was performed for 30 minutes for 30 days. The analyses of color, surface microhardness (SMH), and surface roughness (Ra) were performed at the initial time, after brushing with toothpaste and after immersion in coffee. The ΔL*, Δa*, Δb*, ΔEab, Δand E00 values were calculated comparing after toothpaste with initial time and after coffee with after toothpaste. Data were analyzed using a mixed linear model for repeated measures (SMH), Kruskal-Wallis, Dunn, Friedman, and Nemenyi tests, with α = 0.05.
For ΔL*, the WT-Ch/P group had the lowest values and differed from the other groups comparing the after toothpaste with the initial time interval (p < 0.001). The WT-Ch/P group had the lowest SMH values in after-toothpaste time (p < 0.001). In after-toothpaste time and after coffee time, the WT-S/P group had the highest Ra values and differed from the groups except the WT-Ch/P group (p < 0.001).
The toothpaste composition affects the surface characteristics and susceptibility to staining of the resin composite. The charcoal-based toothpaste had the worst performance for the color analyses and SMH.
本研究调查了不同美白牙膏（WT）对树脂复合材料表面性能和染色易感性的影响。
用微混合树脂复合材料制备圆柱形样本，并根据牙膏类型随机分组（n = 12）：蒸馏水（DW）、普通牙膏（RT）、含二氧化硅+焦磷酸盐的美白牙膏（WT-S/P）、含五磷酸盐和焦磷酸盐的美白牙膏（WT-P/P）、含过氧化氢和焦磷酸盐的美白牙膏（WT-HP/P）以及含活性炭和焦磷酸盐的美白牙膏（WT-Ch/P）。样本在自动刷牙机中刷牙825个周期，模拟30天刷牙。之后，将样本在咖啡中浸泡（10 mL/样本）30分钟，持续30天。在初始时间、用牙膏刷牙后以及浸泡咖啡后进行颜色、表面显微硬度（SMH）和表面粗糙度（Ra）分析。计算在用牙膏刷牙后与初始时间以及浸泡咖啡后与用牙膏刷牙后的ΔL*、Δa*、Δb*、ΔEab、Δ和E00值。使用重复测量的混合线性模型（SMH）、Kruskal-Wallis检验、Dunn检验、Friedman检验和Nemenyi检验分析数据，α = 0.05。
对于ΔL*，WT-Ch/P组的值最低，在用牙膏刷牙后与初始时间间隔比较时与其他组不同（p < 0.001）。WT-Ch/P组在用牙膏刷牙后的SMH值最低（p < 0.001）。在用牙膏刷牙后和浸泡咖啡后，WT-S/P组的Ra值最高，与除WT-Ch/P组外的其他组不同（p < 0.001）。
牙膏成分会影响树脂复合材料的表面特性和染色易感性。含活性炭的牙膏在颜色分析和SMH方面表现最差。
