Effect of temperature and storage time off bleaching agents.

Not Applicable

• Conditions: Dentin sensivity, tooth bleaching; C07.793.266; E06.420.750

• Registration Number: RBR-3vc4d3
• Lead Sponsor: Faculdade de Odontologia de Piracicaba

Brief Summary

Not available

Detailed Description

Not available

Study Timeline

• Results First Posted: 1900-01-01
• Study Start: 2020-09-01
• Last Update Posted: 29 May 2023

Recruitment & Eligibility

• Status: Recruitment completed
• Sex: Not specified
• Target Recruitment: Not specified

Inclusion Criteria

To be included in this study, males and females participants must be age 18 years or older and be in good general and oral health, healthy maxillary and mandibular anterior teeth, no cervical lesions, no white spot lesions or caries, and no periodontal disease. The maxillary central incisors of each patient will be evaluated, specifically the médium third of the facial surface. These teeth must present color A2 or higher, according to the Vita scale (VITA Classic, Vita Zahnfabrik, Bad Sackingen, Germany) and Vita Easyshade (Vident,Brea, CA, USA).

Exclusion Criteria

The exclusion criteria were participants needing endodontic treatment or those with nonvital teeth,pregnant or breast-feeding women, participants with known allergies to bleaching materials or any other material used in this study, those taking antiinflammatory, analgesic or psychotropic drugs, the presence of restorations in the anterior teeth, parafunctional habits, those with severe internal tooth discoloration (tetracycline stains, fluorosis, pulpless teeth), those who smoked, and those who had undergone tooth-whitening procedures. During the first appointment, tooth sensitivity was measured using an air stream in the cervical region of the anterior teeth and vertical/horizontal percussion. Patients who demonstrated pain (on a verbal scale from 0 to 4) were excluded from the study.

Study & Design

• Study Type: Intervention
• Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
The primary outcome will be the bleaching efficacy of an in-office bleaching gel by varying the conditions for the storage of the bleaching gel: time (initial, 3 months and 6 months of storage) and temperature (10 ° C, 25 ° C and 40 ° C). Color analysis will be carried out with the CIE Lab and CIEDE 2000 system using a reflectance spectrophotometer (Vita Easyshade, Vident, Brea, CA, USA) at the times described below: Initial, after the first whitening session, after second whitening session, after the third whitening session, after one week and after 1 month. The results of the values obtained will be quantified and subjected to statistical interpretation with a significance level of 5% to verify whether the outcome occurred.

Secondary Outcome Measures

Name	Time	Method
The secondary outcome will be the assessment of dental sensitivity of patients undergoing bleaching treatment. Dental sensitivity will be analyzed using the SVE scale (scale of<br>verbal evaluation) and the VAS scale (visual analog scale) in the times before bleaching, after the first, second and third week of bleaching, one week and one month after the end of bleaching and descriptive during treatment. The results will be quantified and subjected to statistical interpretation with a significance level of 5% to verify whether there was a secondary outcome of treatment influence on dental sensitivity.