The Effect of an Experimental Gel Based on Copaiba Oil Resin in Reducing Post-bleaching Tooth Sensitivity

Evaluation of the Effect of na Experimental Gel Based on Copaiba Oil Resin in Reducing Post-bleaching Tooth Sensitivity: a Randomized Clinical Study

This randomized, double-blind clinical trial aimed to evaluate the effect of an experimental gel containing copaiba oil resin in reducing postoperative tooth sensitivity caused by bleaching with 35% hydrogen peroxide. The volunteers of this study were randomized into 3 different groups - GC (placebo); GN (potassium nitrate and sodium fluoride); GCO (copaiba oil resin). The dental elements of the GCO received application of the experimental desensitizing gel on the buccal surfaces of the central incisors, lateral incisors, canines and upper and lower premolars, with a rubber cup in an active way, for 10 minutes. The GC and GN groups also received the application of a placebo gel and a nitrate potassium and sodiun fluoride gel, respectively, under the same conditions described for the experimental gel. Subsequently, all groups underwent in-office bleaching treatment with 35% hydrogen peroxide. Post-bleaching sensitivity was collected through a form composed of the visual analogue scale (VAS). Color measurement was performed at two times: baseline (Ti) and one week after the 3rd bleaching session (Tf).

Inclusion Criteria:

• good oral hygiene
• absence of active caries lesions
• never undergone bleaching therapy
• not present dental hypersensitivity
• don't be a smoker
• don´t be pregnant
• present at least 28 teeth in the oral cavity

Exclusion Criteria:

• volunteers undergoing orthodontic treatment,
• presence of periodontal disease
• dental cracks or fractures
• restorations and prostheses on anterior teeth
• extensive molar restorations
• gastroesophageal disorders
• severe internal dental darkening
• presence of dentinal exposure in anterior and / or posterior teeth.