Análise da ação do cálcio na rugosidade do esmalte dental após clareamento caseiro e de consultório

Abstract

Aim: To evaluate the influence of calcium on the roughness of dental enamel subjected to home and in-office whitening agents. Materials and Method: Fifty specimens were prepared from intact bovine incisors. The specimens were divided into five groups based on the type of bleaching agent applied: 22% carbamide peroxide (without calcium), 7,5% hydrogen peroxide (with calcium), 35% hydrogen peroxide (with and without calcium) and a group control. The treatments were applied according to the manufacturer's instructions and the specimens were stored in artificial saliva throughout the experiment. Surface roughness (Ra) was measured using a digital profilometer before and after the bleaching treatments. Results: An increase in surface roughness was observed in all groups subjected to bleaching, regardless of the concentration or protocol used. The gels containing calcium promoted less alteration of the surface, indicating a partial protective effect. Conclusion: It is concluded that all groups submitted to dental whitening showed an increase in the surface roughness of the enamel and that the presence of calcium in the composition of the whitening gels did not interfere with the final roughness of the dental enamel.