Efeito protetor de flúor na rugosidade de superfície do esmalte humano submetido a clareadores dentais

AUTOR(ES)
DATA DE PUBLICAÇÃO

2006

RESUMO

This in vitro study evaluated the effect of different fluoride therapies on the surface roughness of human dental enamel exposed to different bleaching agents. Sixty six specimens obtained from a total of thirty-three 3rd molars that were centrally cut, mounted in acrylic supports, polished and submitted to baseline surface roughness readings (RaB). After that, the specimens were distributed into 11 groups and exposed to one of the bleaching agents (16% carbamide peroxide (CP) or 35% hydrogen peroxide (HP)) and one of the fluoride therapies (0,05% NaF solution (DF); 0,2% NaF solution (WF); 2% final topical fluoride (FTF); 2% initial and final topical fluoride (IFTF)). The positive control group consisted of specimens that were neither exposed to bleaching agents nor fluoride therapies. Negative control group consisted of specimens exposed to the bleaching agents and to none of the fluoride therapies. After being stored in artificial saliva for seven days, final surface roughness readings (RaF) were taken. Percentage differences between RaB and RaF were analyzed by ANOVA and Tukeys HSD tests at a p-value of 0.05. The bleaching agents CP and HP increased the surface roughness compared to the control group; FTF and IFTF reduced the surface roughness of enamel exposed to CP and HP; DF and WF did not reduce the surface roughness of enamel exposed to CP and HP. Within the limits of this study, it can be concluded that both bleaching agents tested increased the surface roughness of dental enamel and both topical fluoride techniques were effective in reducing the increase in enamel surface roughness after bleaching.

ASSUNTO(S)

odontologia flúor dentística fluorose dentária dentes - clareamento

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