Efficacy of Bleaching Treatment on Demineralized Enamel Treated with Resin Infiltration Technique

Abstract

The aim of this study was to investigate the effect of bleaching treatment with 10% carbamide peroxide in white spot lesionsaffected teeth treated with caries infiltration technique. Cylindrical enamel-dentin specimens were prepared from bovine incisors. Baseline color measurement was performed by a spectrophotometer using the CIE L*a*b* system and specimens were divided in two groups: Sound (S) and demineralized (D) enamel. The group S was divided into two subgroups (n = 20): Nonbleached (SNB) and bleached (SB). The group D was divided in four subgroups (n = 20): Nonbleached (DNB), bleached (DB), resin infiltrated/nonbleached (DRNB) and resin infiltrated/ bleached (DRB). Artificial white spot lesions were produced in all groups D, simulating the presence of active lesions in labial tooth surface, and after demineralization, caries infiltration with low viscosity resin was performed in the resin infiltrated groups. In the bleached groups, 10% carbamide peroxide gel was applied (2 hours/day for 14 days). New color measurements were performed after bleaching and color alteration was calculated using E parameter. Data were submitted to oneway ANOVA and Tukey test (5%). There were significant differences among groups when E was evaluated (p = 0.001). Means (± standard deviation) and results of Tukey test were: SNB (2.53 ± 0.48)a; DRNB (2.88 ± 1.03)ab; DNB (3.15 ± 0.65) ab; DRB (2.88 ± 1.03)bc; SB (4.33 ± 0.93)cd; DB (5.27 ± 1.33)d. The bleaching treatment with 10% carbamide peroxide produced no significant color alteration in demineralized enamel treated with resin infiltration technique.

Microhardness and surface roughness of resin infiltrated bleached enamel surface using atomic force microscopy: An in vitro study

“…An advantageous effect of resin infiltration is its ability to enhance the chalky white appearance of WSLs, as the utilized resin has a refractive index similar to the healthy enamel ( Paris and Meyer-Lueckel, 2009 ). Few studies have evaluated the combination treatment of bleaching and resin infiltration on WSLs’ color and microhardness ( Horuztepe and Baseren, 2017 , Araújo et al, 2015 , Pucci et al, 2012 ).…”