Effect of an opioid analgesic associated to a topic desensitizer on the sensitivity caused by in-office tooth bleaching
tooth bleaching. hydrogen peroxide. analgesics, opioid. dentin sensitivity.
This study aimed to evaluate the effectiveness of codeine phosphate 30mg / paracetamol 500mg associated with the topical application of a desensitizing agent to reduce tooth sensitivity during and after in-office tooth bleaching. This is a randomized, controlled, triple-blind, split-mouth clinical trial in which 40 volunteers were randomized into two groups: placebo (n = 20) and opioid analgesic (n = 20) and their hemiarch randomized in two groups: with desensitizer and with prophylactic paste totaling 4 groups denominated “therapeutic management”. Participants were submitted to two tooth bleaching sessions (35% hydrogen peroxide) with 2 applications of 20 minutes in each session and the desensitizer was applied after the procedure for 5 minutes. In sessions, medication was administered to participants one hour before the procedure and every 6 hours for 48 hours. The referred sensitivity level was obtained in each session and daily for 7 days using the millimetric Visual Analog Scale. The statistical analysis was performed using one- and two-way ANOVA followed by the Tukey post-test.