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ABSTRACT: Purpose: Little knowledge exists regarding the potential remineralizing benefits of adding fluoride to carbamide peroxide-based whitening gels. The aim of this project was to evaluate whether a whitening system with fluoride will remineralize previously demineralized enamel.Materials and Methods: Twenty-four extracted teeth were sectioned into quadrants labeled A to D. Tooth quadrants in groups A, B, and D were demineralized with a lactic acid, methyl-cellulose gel system to mimic incipient carious lesions. Group C was neither demineralized nor treated. Group D was demineralized, but not treated with a whitening gel. Groups A and B were exposed to one of two commercially prepared 10% carbamide peroxide whitening gels: one that was fluo-ride free (group A) and one that contained fluoride (0.463%NaF) (group B). Remineralization was evaluated histologically and analyzed statistically using paired t tests accepting p < 0.05 as significant.Results: Shade comparisons showed equal whitening efficacy of both gel A and B. Paired t tests show a significant reduction in lesion depth after treatment with the fluoride containing gel (B: mean lesion depth=100 μm; p < 0.01), while there was no difference for the gel lacking fluoride (A: mean lesion depth=110 μm).Conclusion: Under the conditions of this study, the addition of fluoride to a tooth whitening system does not affect the gel’s whitening efficacy. The addition of fluoride could provide remineralization properties to the gel. As tooth whitening therapies continue to grow and evolve, a strong focus should rest on improving these materials in ways that will provide ever greater patient benefits. Coupling the esthetic benefits of whitening with the preventive benefits of fluoride is a natural step in this direction.CLINICAL SIGNIFICANCETherapuetic quantities of fluoride can impact remineralization properties of commercially available tooth whitening gels without altering whitening properties.
Journal of Esthetic and Restorative Dentistry 06/2006; 18(4):206 - 212. DOI:10.1111/j.1708-8240.2006.00021_1.x · 0.84 Impact Factor