IMPACT OF A CENTRAL ACTION ANALGESIC ASSOCIATED WITH A DESENSIBILIZER ON COLOR CHANGING PROMOTED BY HIGH CONCENTRATION HYDROGEN PEROXIDE
Tooth bleaching. Hydrogen peroxide. Color. Pigmentation
This study aimed to evaluate the efficacy of in-office tooth bleaching in response to the use of a central action analsegic and a topic desensitizing agent. This is a controlled, randomized, triple-blind, split-mouth clinical trial. Forty volunteers participated in the study, half for the placebo medication and the other for codeine / paracetamol and had their hemiarchs on the right and left sides randomly allocated to the prophylactic paste and desensitize Nano P®, distributed as follows, G1 ( Codeine 30mg / Paracetamol 500mg + Prophylactic paste), G2 (Codeine 30mg / Paracetamol 500mg + Desensibilize Nano P®), G3 (Placebo 550 mg + Prophylactic paste) and G4 (Placebo 550 mg + Desensibilize Nano P®) (N = 20). Two bleaching 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. 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. Whitening treatment with 35% hydrogen peroxide produced noticeable color changes and acceptable variations (P & lt; 0.01), with no statistically significant difference between treatments (P & lt; 0.05) and maintained stability when applying the desensitizing protocol (P & lt; 0.01).