Efficacy of dental bleaching with diode laser, led irradiation and chemical activation system: a comparative study.

Abstract

A change in the color of the teeth, or tooth discoloration, leads to a violation of smile aesthetics and, as a result, adversely affect a person’s self-esteem, social adaptation, and psychological state. tooth discoloration is divided into congenital and acquired, extrinsic (temporary) and intrinsic (permanent). most of them are successfully removed using one method, for others there is a need for the combined use of different methods. despite the high demand for teeth bleaching, the safety issue of various methods for removing tooth depigmentation has not been completely resolved.