Influence of surface treatments on enamel susceptibility to staining by cigarette smoke

• Autores: Juliana do Carmo Públio, Maria Beatriz Freitas D'Arce, Nádia Muriano Brunharo, Gláucia María Bovi Ambrosano, Flávio Henrique Baggio Aguiar, José Roberto Lovadino, Débora Alves Nunes Leite Lima
• Localización: Journal of Clinical and Experimental Dentistry, ISSN-e 1989-5488, Vol. 5, Nº. 4 (octubre), 2013, págs. 163-168
• Idioma: inglés
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• Resumen

  • Objectives: The purpose of this study was to evaluate the influence of remineralizing agents, including artificial saliva, neutral fluoride, and casein phosphopeptide-amorphous calcium phosphate (CPP-ACP), on the susceptibility of bleached enamel to staining by cigarette smoke.

    Study design: Fifty bovine enamel blocks were randomly divided into five groups (n = 10): G1- bleaching; G2- bleaching and immersion in artificial saliva; G3- bleaching and application of CPP-ACP; G4- bleaching and application of neutral fluoride; and G5- untreated (Control). Teeth were bleached with 35% hydrogen peroxide and treated with the appropriate remineralizing agent. After treatment, all groups were exposed to cigarette smoke. Enamel color measurements were performed at three different times: before treatment (T1), after treatment (bleaching and remineralizing agent) (T2), and after staining (T3), by using the CIE Lab method with a spectrophotometer. The data coordinate L* was evaluated by analysis of repeated-measures PROC MIXED and Tukey-Kramer's test, and the ?E values were submitted to one-way ANOVA and Tukey¿s test (? = 0.05).

    Results: The G1 group did not show any statistically significant difference for L* values between times T1 and T2. The G4 and G5 groups showed lower L* values at T3 compared to T2. No significant differences between the groups were observed for ?E (after treatment and staining). However, G4 showed a clinically apparent color change.

    Conclusions: Treatment of bleached enamel with neutral fluoride can contribute to the increased staining of enamel due to cigarette smoke.