Effect of Different Fluoride Concentrations of Experimental Dentifrices on Enamel Erosion and Abrasion


Autoria(s): MORETTO, M. J.; MAGALHAES, A. C.; SASSAKI, K. T.; DELBEM, A. C. B.; MARTINHON, C. C. R.
Contribuinte(s)

UNIVERSIDADE DE SÃO PAULO

Data(s)

19/10/2012

19/10/2012

2010

Resumo

It has been suggested that fluoride products are able to reduce erosive tooth wear. Thus, the purpose of this in vitro study was to evaluate the effect of dentifrices with different fluoride concentrations as well as of a low-fluoridated dentifrice supplemented with trimetaphosphate (TMP) on enamel erosion and abrasion. One hundred twenty bovine enamel blocks were assigned to the following experimental dentifrices: placebo, 1,100 mu g F/g, 500 mu g F/g plus 3% TMP and 5,000 mu g F/g. The groups of enamel blocks were additionally subdivided into conditions of erosion (ERO) and of erosion plus abrasion (ERO + ABR). For 7 days, the blocks were subjected to erosive challenges (immersion in Sprite (R) 4 times a day for 5 min each time) followed by a remineralizing period (immersion in artificial saliva between erosive challenges for 2 h). After each erosive challenge, the blocks were exposed to slurries of the dentifrices (10 ml/sample for 15 s). Sixty of the blocks were additionally abraded by brushing using an electric toothbrush (15 s). The alterations of the enamel were quantified using the Knoop hardness test and profilometry (measurements in micrometers). The data were analyzed using a 2-way ANOVA test followed by a Bonferroni correction (p < 0.05). In in vitro conditions, the 5,000 mu g F/g and 500 mu g F/g plus 3% TMP dentifrices had a greater protective effect when compared with the 1,100 mu g F/g dentifrice, under both ERO and ERO + ABR conditions. The results suggest that dentifrices alone are not capable of completely inhibiting tooth wear. Copyright (C) 2010 S. Karger AG, Basel

National Council for Scientific and Technological Development[133857/2007-7]

Identificador

CARIES RESEARCH, v.44, n.2, p.135-140, 2010

0008-6568

http://producao.usp.br/handle/BDPI/25848

10.1159/000302902

http://dx.doi.org/10.1159/000302902

Idioma(s)

eng

Publicador

KARGER

Relação

Caries Research

Direitos

restrictedAccess

Copyright KARGER

Palavras-Chave #Dental enamel, abrasion #Dental enamel, erosion #Dentifrice, fluoride #Trimetaphosphate #DENTAL EROSION #IN-VITRO #BOVINE ENAMEL #BRUSHING ABRASION #SITU/EX VIVO #ERODED ENAMEL #SOFT DRINKS #TOOTHPASTES #EFFICACY #IMPACT #Dentistry, Oral Surgery & Medicine
Tipo

article

original article

publishedVersion