IMPACT OF A SYSTEMIC DRUG ASSOCIATED WITH A POSTOPERATIVE TOPIC DESENSITIZER ON COLOR CHANGING PROMOTED BY HIGH CONCENTRATION HYDROGEN PEROXIDE
Tooth bleaching. Hydrogen peroxide. Color. Pigmentation
This study aimed to evaluate the effectiveness of dental bleaching in the office when pre- and postoperative systemic use of paracetamol/codeine (PACO) and postoperative application of topical desensitizer were made. This was a controlled, randomized, triple-blind, split-mouth clinical trial with 14 days of follow-up. Forty volunteers participated of this study. Half took the PACO medication and the other half a placebo (PLA) one hour before the bleaching procedure, and their hemiarchs were randomly assigned to receive a prophylactic paste (PAS) and Desensibilize Nano P® (NP), generating four groups of therapeutic management by hemiarchs: G1 (PLA + PAS), G2 (PLA + NP), G3 (PACO + PAS) and G4 (PACO + NP) (n = 20). Two whitening sessions were performed on the entire sample with 35% hydrogen peroxide with two 20-minute applications, with an interval of one week between each session. Color evaluation was performed using the VITA Classical® Scale and ShadeEye NCC® Colorimeter. The statistical analysis was performed using the ANOVA 2-factor test with Tukey's post-test with the aid of the GraphPad Prism 8.0 software. The bleaching treatment with 35% hydrogen peroxide produced a change in color pattern after bleaching (P <0.005) and without statistically significant differences between therapeutic management (P> 0.005). Therefore, in-office tooth whitening using 35% hydrogen peroxide did not show any compromise in its clinical efficacy related to color after application of the tested desensitizing protocols.