Universidade Federal Do Para

This randomized clinical trial will evaluate the effect of an experimental gel containing andiroba oil (Carapa guianensis) in reducing postoperative tooth sensitivity caused by bleaching with 35% hydrogen peroxide. Volunteers in this study will be randomized into 3 different groups - PG (placebo gel), KF2G (potassium nitrate gel) and AG (andiroba gel). Groups KF2G and AG will receive treatment with potassium nitrate desensitizing gel and the experimental andiroba gel, respectively. This will be applied to the buccal surfaces of the central incisors, lateral incisors, canines and upper and lower premolars, with a rubber cup in an active manner, for 10 minutes. Group GP will receive the application of a placebo gel (without active ingredient), under the same conditions described for the other groups. Subsequently, all groups will undergo in-office bleaching treatment with 35% hydrogen peroxide. Post-bleaching sensitivity will be collected using a form consisting of the visual analogue scale (VAS). Color measurement will be performed with a spectrophotometer at two times: baseline (T0) and one week after the 3rd bleaching session (T1).

This randomized, single-blind, placebo-controlled clinical trial aims to clinically evaluate the effect of an experimental gel containing copaiba oleo-resin in the control of dentin hypersensitivity (DH) in non-carious cervical lesions (NCCL). Seventy-five hypersensitive teeth will be selected into three groups (N=25) and approved in three treatment sessions. The groups will be: GROUP P= water-soluble placebo gel without active ingredient; GROUP KF2: Potassium nitrate 5% + Sodium fluoride 2%; GROUP GC: Gel containing copaiba oleo-resin. A visual analogue scale (VAS) will be used to compare the DH after tactile stimulation with an exploratory probe and evaporative stimulation with air jets. The DH assessments will be performed at four times: baseline, after 1 week, 15 days and 30 days after the beginning of treatment.

The objective is to evaluate the effect of photobiomodulation (PBM) applied before or after in-office tooth whitening in reducing tooth sensitivity (TS) and color change. Sixty-six patients aged between 18 and 28 years old, of both sexes, with good oral and general health will be selected for the study. A randomization process will be carried out to allocate participants into the three different groups: FBM-Before, FBM-After and Placebo. All groups will undergo in-office whitening treatment with 35% hydrogen peroxide (Whitness HP, FGM, Joinville, SC, Brazil). Three whitening sessions will be carried out, considering a seven-day interval between sessions. TS will be measured using a visual analogue scale (VAS) and a five-point numerical rating scale (NRS), while shade change will be assessed using a spectrophotometer: before the bleaching treatment (T0), after the first (T1), second (T2). ) and third (T3) weeks of treatment and 30 days (T4) after the end of the bleaching treatment.