Efeito de Dois Sistemas de Branqueamento na Rugosidade da Superfície do Esmalte

Abstract

Aimsto assess the effect of 10% carbamide peroxide and 25% hydrogen peroxide activated by an LED lamp, on the roughness of the enamel surface and to compare the effect of the two treatments. Materials and Methodswe obtained the thirty samples after the separation of the crowns of fifteen premolars, split vertically on the long dental axis and from the vestibular to the lingual faces. Three groups were established according to the treatment: group 1 (no treatment); group 2, 10% carbamide peroxide (Platinum®, 14 days); group 3, 25% hydrogen peroxide (Zoom! Chairside System®, 60 minutes). Between treatments the samples were immersed in artificial saliva. Before and 24 hours after the treatments, the samples were analyzed using a computerized roughness tester. ResultsThe results were assessed by comparison of the mean values and standard deviation. There were differences between the mean values of the roughness of the samples from the groups without treatment and those treated with 25% hydrogen peroxide with light (parameters Ra and Rz), and those from the group treated with 10% carbamide peroxide (parameters Ra, Rz and Rpm). Conclusions1 – in group 1 no increase of the mean values of roughness was identified.2 - in group 2 the mean values of roughness are generally higher in teeth after the treatment.3 - in group 3, there was no increase in the mean values of roughness.4 - Further tests need to be carried out with a greater time lapse, in order to assess the regression of these values.