Do commercial whitening dentifrices increase enamel erosive tooth wear?

Abstract

Do commercial whitening dentifrices increase enamel erosive tooth wear?Objective: This in vitro study evaluated the effect of commercial whitening dentifrices on erosive tooth wear (ETW) of bovine enamel samples, in comparison with commercial regular dentifrices. Methodology: Sixty bovine crowns were embedded in acrylic resin, polished and then had their baseline profile determined. They were randomly assigned to 5 groups (n=12/group), according to the type of commercial dentifrice to be tested: GI -Crest Anti-cavity Regular; GII -Crest 3D White; GIII -Colgate Total 12 Clean Mint; GIV -Colgate Optic White; GV -Placebo (negative control, fluoridefree dentifrice). The samples were submitted to daily erosive and abrasive challenges for 3 days. The erosive challenges were performed 3 times a day by immersing the specimens in 0.1% citric acid solution (pH 2.5) for 90 s. Each day after the first and last erosive challenges, the specimens were subjected to the abrasive challenge for 15 s, using a toothbrushing machine (Biopdi, São Carlos, SP, Brazil), soft toothbrushes and slurry (1:3 g/ml) of the tested toothpastes (1.5 N). The specimens were kept in artificial saliva between the challenges. The final profile was obtained and the ETW (µm) was calculated. Data were analyzed by Kruskal-Wallis and Dunn's tests (p<0.05). Results: All dentifrices tested significantly reduced the enamel wear in comparison with the Placebo, except GIII. The median (95% CI) ETW was 1.35 (1.25-1.46) bc for GI, 1.17 (1.01-1.34) cd for GII, 1.36 (1.28-1.45) ab for GIII, 1.08 (1.04-1.14) d for GIV and 2.28 (2.18-2.39) a for GV. Conclusion: When dentifrices from the same manufacturer were compared, the whitening dentifrices led to similar or less wear than the regular ones.

Impact of desensitizing/whitening toothpastes on tooth color change after abrasion and erosion–abrasion

“…Although many studies have investigated the effects of toothpastes on ETW, 30,31 there is not much information about their impact on the color of teeth from subjects with high risk of tooth wear. In the present study, the tooth color change promoted by desensitizing and/or whitening toothpastes under erosion-abrasion and abrasion conditions was evaluated.…”

“…26 Since this painful condition has a high prevalence 27 and can compromise the individual's everyday habits, 28,29 desensitizing toothpastes that can deliver agents that help promoting pain relief are well acceptable. Moreover, many of these toothpastes with desensitizing (D) or whitening (W), or both (DW) claims, have shown to also protect the sound/eroded enamel 30,31 and dentin against further erosive demineralization. 32 However, no study has yet systematically evaluated their impact on tooth color under abrasive and erosiveabrasive conditions.…”

Effectiveness and Adverse Effects of Over-the-Counter Whitening Products on Dental Tissues

“…In addition, it is of great importance that dentifrices, in general, present moderate-to-low abrasiveness in order to prevent enamel surface alterations (such as roughness or microhardness) and, especially, tooth wear (17, 36,42). Mainly, the general advice is to avoid whitening dentifrices for the patients with a higher risk of developing erosive tooth wear (ETW) (42), particularly if the dentin is exposed (43), but the literature is very controversial regarding the real effects or correlations between the abrasiveness of the whitening dentifrices and ETW (44)(45)(46)(47)(48).…”

Uso de Dentifrícios Branqueadores em Odontologia: Revisão da Literatura

“…Mudanças morfológicas na estrutura do esmalte é um assunto controverso. Estudos recentes apontam que a escovação diária com dentifrícios branqueadores não aumenta o grau de desgaste quando comparado a pastas comerciais convencionais, se mostrando um método seguro de higiene oral 13,18,25,26 .…”

“…Estudo conduzido por Simões et al 25 mostrou que a escovação com dentifrícios branqueadores não aumenta o grau de desgaste do esmalte quando comparados aos dentifrícios convencionais, levando até a desgastes semelhantes ou menores. Outro estudo conduzido por Rosalino et al 13 avaliou clinicamente a escovação com cremes dentais branqueadores pelo período de 90 dias.…”