Trial design
TOOTH SENSITIVITY
This study was a prospective, randomized, parallel, single-blind clinical trial, following the guidelines published by the Consolidated Standards of Reporting Trials-CONSORTThe studied factor was the usage time of the trays at three levels: 2 (G2), 4 (G4), and 8 (G8) hours/day. The response variables were the patient’s compliance behavior regarding the usage time of trays, the efficacy of dental bleaching, assessed with visual and spectrophotometric evaluations, and tooth sensitivity.