Premium
One‐year bleaching efficacy using two HP products with different pH: A double‐blind randomized clinical trial
Author(s) -
Bersezio Cristian,
Martín Javier,
Prieto María V.,
Meneses Pablo,
Angel Pablo,
Eduardo Fernández G.,
Loguercio Alessandro
Publication year - 2019
Publication title -
journal of esthetic and restorative dentistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.919
H-Index - 60
eISSN - 1708-8240
pISSN - 1496-4155
DOI - 10.1111/jerd.12505
Subject(s) - hydrogen peroxide , carbamide peroxide , double blind , dentistry , mann–whitney u test , single blind , significant difference , randomized controlled trial , chemistry , medicine , nuclear chemistry , zoology , surgery , biochemistry , biology , alternative medicine , pathology , placebo
Objectives This split‐mouth, double‐blind, randomized clinical trial evaluated the 1‐year bleaching efficacy produced by two hydrogen peroxide gels with different pHs. Materials and Methods Twenty‐eight patients were divided into two groups corresponding to two different products: Pola Office (pH = 2.0/SDI) and Pola Office Plus (pH = 7.0/SDI). The treatment was assessed during and after the bleaching procedure up to 12 months post‐treatment. The assessment consisted of two bleaching scales shade guide units (ΔSGU) and spectrophotometric device (Δ E , ΔE00, and Whiteness Index) of both maxillary quadrants. Results for ΔSGUs in both scales and ΔE00 and Whiteness Index were compared using Mann Whitney test and Δ E measurements through the t ‐Student test for paired samples in each evaluation time. The color rebound (1‐ vs 12‐month postbleaching data) was evaluated with Wilcoxon test (alpha = .05). Results During the different times of evaluation, the color variation was similar for both products ( P > .05), both for subjective (ΔSGUs) and objective assessments (Δ E , ΔE00, and Whiteness Index). Also, both products showed a slight rebound after 12‐month postbleaching ( P > .05). Conclusions Concerning the stability of color, in‐office dental whitening with two hydrogen peroxide gels of different pHs produced similar results, with no significant of regression, for 12 months postwhitening. Clinical Significance Bleaching using a neutral (pH = 7.0) in‐office gel demonstrated similar stability and rebound effect than an acidic one (pH = 2.0).