Evaluation of the efficacy of the use of violet LED light in the bleaching of damaged primary incisors darkened by trauma.

Background: The aim of this study was to evaluate efficacy of violet LED light for the bleaching treatment of primary incisors darkened by trauma.

Methods: Twenty deciduous incisors with color change were selected, divided into two groups: control - no bleaching protocol was applied, and VL- treated with violet LED. The change color analysis was taken in each tooth, by spectrophotometer.