AbstractNatrosol and Aristoflex®AVC polymers are widely applied in the
cosmetic industry and have recently been applied as a thickener option in the
composition of dental bleaching gels, with the purpose to reduce the adverse
effects on enamel mineral components. The aim of this study was to evaluate the
color variation (ΔE*ab, ΔE00,∆WID), surface roughness (Ra), and
mineral content quantification (Raman Spectroscopy) of dental enamel after
bleaching treatment with experimental gel-based on 10% carbamide peroxide (CP),
containing Carbopol, Natrosol, and Aristoflex®AVC. Sixty bovine
teeth were randomly divided into 6 groups (n=10): Negative Control
(NC) - no treatment; Positive Control (PC) -
Whiteness Perfect 10% - FGM; CP with Carbopol (CPc); CP with
Natrosol (CPn); CP with Aristoflex®AVC
(CPa);NCP- no thickener. Data were analyzed, and
generalized linear models (∆WID-T0x T1) were
used for repeated measurements in time for Ra and with a study factor for
ΔE*aband ΔE00. For the evaluation of the mineral content,
data were submitted toone-wayANOVA and Tukey tests. For
enamel topographic surface analysis the Scanning Electron Microscope (SEM) was
performed. A significance level of 5% was considered. ΔE*aband ΔE00were significantly higher for CPc, CPn, CPa,
and NCP groups. (∆WID) showed a significantly lower mean than the
other groups for NC in T1. After bleaching (4-hour daily application
for 14 days), Ra was higher in the CPc, CPn, and PC groups. For CPa, Ra was not
altered. No significant difference was found in the quantification of mineral
content. CPa preserved the surface smoothness more effectively.
Aristoflex®AVC is a viable option for application as a thickener
in dental bleaching gels, presenting satisfactory performance, and maintaining
the whitening efficacy of the gel, with the advantage of preserving the surface
roughness of tooth enamel without significant loss of mineral content.