Study of the impact of the bleaching with 6% h2o2 solution on teeth wear

Rodrigues, F.; Serro, A. P.; Figueiredo-Pina, Célio

http://hdl.handle.net/10400.26/10471

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Authors

Rodrigues, F.

Serro, A. P.

Figueiredo-Pina, Célio

Abstract(s)

Objectives: This study aims to evaluate the effect of a 6% hydrogen peroxide (H2O2) solution, activated with UV-light, in colour, wear, microhardness and roughness of enamel surface. Methods: 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. Results: 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. Conclusions: 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.