Study of the Impact of the Bleaching with 6 % H2O2 Solution on Teeth Wear
This study aims to evaluate the effect of a 6 % hydrogen peroxide (H 2 O 2 ) solution, activated with UV-light, in colour, wear, microhardness and roughness of enamel surface. Five teeth were cut, polished and exposed to black tea solution to confer them a dark color. The specimens were tested before and after bleaching using a spectrophotometer colour equipment, a nanotribometer, a micro durometer and a SEM. On comparing with untreated, the treated enamel surface showed an improvement of colour but a reduction of microhardness and an increase of roughness and wear. A 6 % hydrogen peroxide solution, activated with UV-light, has capacity to induce alterations in enamel surface making it less hard and more susceptible to wear.
Keyword(s): Bleaching, Hydrogen peroxide, Dental wear
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