Effects of Desensitizing Dentifrices on the Reduction of Pain Sensitivity Caused by In-office Dental Whitening

University of Campinas, Brazil

Status and phase: Completed; Phase 4

Conditions: Tooth Whitening; Sensitivity

Treatments: Drug: Hydrogen peroxide; Procedure: Gingival protection barrier; Procedure: Relative isolation; Procedure: Application of desensitizing gel; Procedure: Selection and preparation of the volunteers; Procedure: Used a dentifrice; Procedure: Evaluation of the tooth color

Study type: Interventional

Funder types: Other

Identifiers

NCT03019224

104/2015

Details and patient eligibility

About

Introduction: The pain sensitivity associated with whitening is the main problem reported by patients during dental whitening, and the use of desensitizing dentifrices is an alternative for the treatment of sensitivity.

Objective: To evaluate clinically the influence of desensitizing dentifrices applied through a plastic tray, reducing the pain sensitivity and color variation caused by the technique of in-office dental whitening, through a controlled double-blind clinical study.

Methods: A longitudinal prospective study was conducted with 48 individuals, 18 years and 30 years of age, without gender distinction, who underwent in-office dental whitening using 35% hydrogen peroxide (Whiteness HP, FGM, Joinville , SC, Brazil) in three clinical sessions with a one-week interval between them. The volunteers used in the night for each bleaching session a plastic tray for 4 hours containing one of the dentifrices related to the experimental groups: Group 1 (Control) - Sucralose (S) (Biotype - Manipulation pharmacy); Group 2 (Active control) - Sodium fluoride (FS) with 1450ppm of fluorine (Close up triple, Unilever); Group 3 - Arginine, calcium carbonate (ACC) and sodium monofluorophosphate with 1450 ppm fluorine (Colgate sensitive pro-relief, Colgate-Palmolive); Group 4 - 5% potassium nitrate (NP) and sodium fluoride with 1450 ppm fluorine (Sensodyne pro-enamel, GlaxoSmithKline). The evaluation of the sensitivity associated with the times of use of the plastic tray in the first session (S1: sensitivity before the tray, S2: sensitivity after the tray), in the second session (S3: sensitivity before the tray, S4: in the third session (S5: sensitivity before the tray, S6: sensitivity after the tray) used the analog numerical scale with scores from 0 to 10 and for the color evaluation the spectrophotometer (Easyshade, Vident, Brea, CA, Obtaining the data that were used in the CIELab system. The data were submitted to the multivariate analysis of variance (MANOVA) with repeated measurements and Lambda Wilks test with a 5% probability level to differentiate the groups. In addition, the factorial variance analysis (ANOVA) in one criterion was applied. Values of p <0.05 were considered statistically significant.

Enrollment: 4 patients

Sex: All

Ages: 18 to 30 years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• age of 18 years or older
• good oral and general health
• hygid anterior tooth with color shade higher than A2 on the Vita Classic scale (VITA Zahnfabrink, Bad Säckingen, Germany).

Exclusion criteria

• smoking, pregnancy or breastfeeding
• previous dental whitening
• para-functional habits
• dentin sensitivity
• anterior tooth with restorations and carious lesions
• non-vital discoloration
• unsatisfactory restorations

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Factorial Assignment

Masking: Double Blind

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4 participants in 4 patient groups, including a placebo group

Group 1

Placebo Comparator group

Description:

The use of desensitizing dentifrice \[Sucralose (S) Control dentifrice)\] in plastic tray.

Treatment:

Drug: Hydrogen peroxide

Procedure: Gingival protection barrier

Procedure: Relative isolation

Procedure: Application of desensitizing gel

Procedure: Used a dentifrice

Procedure: Evaluation of the tooth color

Procedure: Selection and preparation of the volunteers

Group 2

Experimental group

Description:

The use of desensitizing dentifrice \[Sodium fluoride (FS) with 1450ppm of fluorine (Close up triple, Unilever)\] in plastic tray.

Treatment:

Drug: Hydrogen peroxide

Procedure: Gingival protection barrier

Procedure: Relative isolation

Procedure: Application of desensitizing gel

Procedure: Used a dentifrice

Procedure: Evaluation of the tooth color

Procedure: Selection and preparation of the volunteers

Group 3

Experimental group

Description:

The use of desensitizing dentifrice \[Arginine, calcium carbonate (ACC) and sodium monofluorophosphate with 1450 ppm fluorine (Colgate sensitive pro-relief, Colgate-Palmolive)\] in plastic tray.

Treatment:

Drug: Hydrogen peroxide

Procedure: Gingival protection barrier

Procedure: Relative isolation

Procedure: Application of desensitizing gel

Procedure: Used a dentifrice

Procedure: Evaluation of the tooth color

Procedure: Selection and preparation of the volunteers

Group 4

Experimental group

Description:

The use of desensitizing dentifrice \[Sodium fluoride based dentifrice with 1450 ppm of fluorine associated with 5% potassium nitrate\] in plastic tray.

Treatment:

Drug: Hydrogen peroxide

Procedure: Gingival protection barrier

Procedure: Relative isolation

Procedure: Application of desensitizing gel

Procedure: Used a dentifrice

Procedure: Evaluation of the tooth color

Procedure: Selection and preparation of the volunteers