At-home Bleaching Using Clear Retainers

Universidad Rey Juan Carlos40 enrolled

Overview

The aim of this project is to clinically evaluate patient satisfaction, whitening efficacy, tooth sensitivity, and gingival irritation during at-home whitening with 10% carbamide peroxide using an Essix-type retainer or a Vivera retainer.

Forty patients (n=40) will be randomized as to which side will receive the type of bleaching tray, essix-type retairner or Vivera retainer. The at-home bleaching will be performed with 10% carbamide peroxide (Opalescence PF 10%) for 2 hours The treatment lasted 4 weeks, although as each retainer was worn every other day, the actual application time was 2 weeks. Patient´s satisfaction will be evaluated at baseline, after one, two weeks, and 4 weeks with an apropriate questionnaire using a visual analog scale (EVA 0-10). The color will be assessed at baseline, after one, two and four weeks using subjective color guides (VITA Classical and VITA Bleachguide 3D-MASTER) and a objective digital spectrophotometer (VITA Easyshade). The intensity and absolute risk of tooth sensitivity and gingival irritation will also be determined with a visual analog scale (EVA 0-10). Color change between groups will be compared by paired Student´s t-test. The absolute risk of tooth sensitivity and gingival irritation for both groups will be compared by McNemar test. Also, odds ratios, confidence intervals, and Spearman correlation will be determined. The intensity of tooth sensitivity, gingival irritation and patient´s satisfaction will be compared by paired Student´s t-test. The level of statistical significance accepted will be 5% for all analyses.

Study Type

INTERVENTIONAL

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

DOUBLE

Enrollment

Conditions

Tooth Discoloration Tooth Sensitivity Gingivitis Satisfaction, Patient

Interventions

WhiteningOTHER

Two syringes of 10% carbamide peroxide bleaching gel will be provided for use with each type of tray. Volunteers will be instructed to use the whitening gel once a day for 2 hours, for 3 days per week with each retainer, completing a total of 4 weeks of whitening procedure.

Eligibility

Sex: ALLMin age: 18 YearsMax age: 80 YearsHealthy volunteers:

Medical Language ↔ Plain English

The inclusion criteria will be the following: * Patients over 18 years of age. * Patients with vital teeth without restorations, single crowns, implants and/or bridges at the level of the anterior teeth. * Absence of cavities in the teeth to be whitened. * Patients with satisfactory oral hygiene, and periodontally healthy, who are not undergoing periodontal maintenance and who do not use chlorhexidine rinses. Patients with recessions without sensitivity are included. * Absence of sensitivity, measured based on stimulation with the air from the syringe. * Patients who are at least in A2-A3 color (Vita Classic Guide) The exclusion criteria will be the following: * Patients who have previously undergone whitening (less than 5 years). * Patients undergoing orthodontic treatment. * Patients with white spot or developmental alterations (dentinogenesis imperfecta, amelogenesis imperfecta) or with stains (tetracyclines or fluorosis). * Patients with a history of trauma to anterior teeth. * Patients who require internal whitening. * Smokers. * Pregnant or lactating women. * Allergy to any component of whitening. * Alterations of the oral mucosa (desquamative gingivitis, OLP, leukoplakias, etc.). * Medical conditions considered by the researchers that may compromise the study or the individual safety of the patient. * Patients with poor oral hygiene. * Patients with previous hypersensitivity.

Locations (1)

Clínica Dental Iturralde

Tafalla, Navarre, Spain

Outcomes

Primary Outcomes

Patient´s satisfaction

It will be measured with a questionnaire using a visual analog scale (EVA), when a essix-type retairner or Vivera retainer is used to perform a at home bleaching treatment with 10% carbamide peroxide.

Time frame: Baseline, after one, two and four weeks

Secondary Outcomes

Color change evaluation

The color will be assesed using subjetive color guides (VITA Classical and VITA 3D-MASTER) and a objetive digital spectrophotometer (VITA Easyshade).

Time frame: Baseline, after one, two and four weeks

Intensity and absolute risk of tooth sensitivity

They will be determined by means of a visual analog scale (EVA), using a essix-type retairner or Vivera retainer, during at home bleaching treatment with 10% carbamide peroxide.

Time frame: Baseline, after one, two, four weeks, and at 1 month after bleaching treatment

Intensity and absolute risk of gingival irritation

They will be determined by means of a visual analog scale (EVA), using a essix-type retairner or Vivera retainer, during at home bleaching treatment with 10% carbamide peroxide.

Time frame: Baseline, after one, two, four weeks, and at 1 month after bleaching treatment

Data from ClinicalTrials.gov

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