Department of Dental Materials and Prosthodontics, Ribeirão Preto School of Dentistry, University of São Paulo, Av. do Café, s/n, Monte Alegre, Ribeirão Preto, São Paulo, Brazil.
J Esthet Restor Dent. 2018 Sep;30(5):383-389. doi: 10.1111/jerd.12379. Epub 2018 Mar 30.
This clinical study evaluated the influence of whitening toothpaste on color and surface roughness of dental enamel.
Initially, the abrasiveness of the toothpastes used (Sorriso Dentes Brancos [SDB]; Colgate Luminous White and Close up White Now) was tested on 30 (n = 10) plexiglass acrylic plates that were submitted to mechanical tooth brushing totalizing 29,200 cycles. Subsequently, 30 participants were selected, and received a toothbrush and nonwhitening toothpaste (SDB). The participants used these products for 7 days and initial color readouts (Spectrophotometer) and surface roughness of one maxillary central incisors was performed after this period of time. For surface roughness readouts, one replica of the maxillary central incisor was obtained by a polyvinyl siloxane impression material (Express) and polyurethane resin. After baseline measurements, participants were separated into three groups (n = 10), according to the toothpaste used. The participants returned after 7, 30, and 90 days when new color readouts and surface roughness were recorded. The measured values were statistically analyzed (2-way-ANOVA, repeated measures, Tukey, P < .05).
Whitening toothpastes did not promote significant (P > .05) color alteration and nor increased the surface roughness of the dental enamel in brushing time of the study.
The abrasiveness of whitening toothpaste and the brushing trial period did not affect the surface roughness of dental enamel. However, color changes observed on enamel were above the perceptibility and acceptability thresholds reported in the literature.
The over-the-counter toothpastes tested had an effect on dental enamel color above the perceptibility and acceptability thresholds but did not change the surface roughness of the teeth.
本临床研究评估了美白牙膏对牙釉质颜色和表面粗糙度的影响。
最初，对使用的牙膏（Sorriso Dentes Brancos[SDB]；Colgate Luminous White 和 Close up White Now）的研磨性进行了测试，共在 30 块（n=10）有机玻璃亚克力板上进行了机械刷牙，共计 29200 次循环。随后，选择了 30 名参与者，并为他们提供了牙刷和非美白牙膏（SDB）。参与者使用这些产品 7 天，在这段时间后进行初始颜色读数（分光光度计）和上颌中切牙的表面粗糙度。为了进行表面粗糙度读数，通过聚硅氧烷印模材料（Express）和聚氨酯树脂获得上颌中切牙的一个复制品。进行基线测量后，根据使用的牙膏将参与者分为三组（n=10）。参与者在第 7、30 和 90 天返回时，记录新的颜色读数和表面粗糙度。使用 2 方式方差分析、重复测量、Tukey 检验进行测量值的统计学分析（P<.05）。
美白牙膏在研究刷牙时间内没有显著（P>.05）改变颜色，也没有增加牙釉质的表面粗糙度。
美白牙膏的研磨性和刷牙试验时间没有影响牙釉质的表面粗糙度。然而，在文献报道的可感知和可接受阈值之上观察到的牙釉质颜色变化。
测试的市售牙膏对牙釉质颜色有影响，超过了可感知和可接受的阈值，但没有改变牙齿的表面粗糙度。
