Abstract
Aim: To evaluate the color stability of bovine enamel with artificial white spot lesions treated with resin infiltration (ICON) or remineralization with fluoride using two storage methods. Methods: Sixty incisors were submitted to artificial white spot lesion induced by demineralization-remineralization (DE-RE) cycling. Initial color was evaluated with CIE-Lab to measure ΔEab. Demineralized teeth were divided according to the treatment of the white spot lesion (n = 20): 1) Remineralization with 2% neutral fluoride gel for 4min (control); 2) ICON application following manufacturer’s recommendations; and 3) ICON with decreased drying time after the application of ethanol. After 24h, color was evaluated and samples were subdivided (n = 10) according to storage: 1) distilled water for 1 month; 2) grape juice for 10min daily. After storage, color was evaluated. L*, a* and b* data were analyzed by one-way ANOVA and ∆Eab data by two-way ANOVA followed by Tukey’s HSD (α = 0.05). Results: L* was affected by juice storage, and decreased when ICON was applied with decreased drying time after the ethanol application. The same behavior occurred with a* (increase with reduced drying time), while b* was not affected. For ∆Eab significant differences were observed between groups (p = 0.0219) and storage methods (p = 0.0007). There was no interaction effect (p = 0.1118). Remineralization with fluoride presented the lowest color changes after storage in water. Conclusion: Treatment of artificial carious lesions with resin infiltration presented greater color changes than fluoride remineralization after storage in both solutions in vitro.
Highlights
Dental caries is a common multifactorial disease that depends on host susceptibility, microorganism contamination, sugar rich diet and time for progression[1]
For measurements made after storage in water/juice, ΔEab values were lower for samples treated with fluoride and ICON with recommended time, both stored in water
The present study was designed to evaluate the color stability of bovine teeth with artificial white spot lesions treated with remineralization (Flugel, DFL Indústria e Comércio SA) or resin infiltration (ICON, DMG) using two different application techniques
Summary
Dental caries is a common multifactorial disease that depends on host susceptibility, microorganism contamination, sugar rich diet and time for progression[1]. Its first clinical sign is the presence of opaque white spot lesions, which consist of non-cavitated subsurface lesions that can be treated conservatively using preventive approaches[3]. Among these approaches, the application of fluoride in the form of solution, gel or varnish are the most common in dental clinics, since it is cost accessible and easy to use[4]. The introduction of resinous materials to seal pits and grooves and to infiltrate white spot lesions brought the advantage of being an immediate treatment. Studies with infiltrant in anterior teeth have questionable esthetic in masking white spot lesions in the long-term[5,6,7]
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