Resumo

CAMARGO, Lilian Souza Kretter de et al. Superficial layer resin isolation previously polymerization and its effects on staining. Rev. Assoc. Paul. Cir. Dent. [online]. 2012, vol.66, n.4, pp. 286-291. ISSN 0004-5276.

The aim of this study was to evaluate the one composite resin staining polymerized after the superficial oxygen inhibition using the Oxiblock (FGM, Joinville/SC, Brazil). 45 specimens were confectioned with the Opallis resin (FGM, Joinville/SC, Brazil), A1 for enamel, which had been divided in three groups with 15 samples each. Group 1 (control): did not receive any superficial protection, and was polymerized for 40s in each one of the three regions of the sample, group 2 (experimental): before superficial protection be applied was polymerized for 20s and after the Oxiblock application received final polymerization for more 20s in each one of the three regions and group 3 (experimental): received superficial protection before the polymerization for 40s in each one of the three regions. After the polymerization and the gel rinsed, the samples were immersed in a dye solution of coffee by 15 days and stored in a temperature of 37°C. After the storage time spectrophotometric measurements were carried out (Ultrospec 2000 - GE Healthcare, Pharmacia Biotech, São Paulo/SP, Brazil). The statistical treatment of the results (Kruskal Wallis and Miller Tests) pointed that the use of the gel coat Oxiblock was effective in reducing the staining when applied before the polymerization of the composite resin.

Palavras-chave : composite resins; oxygen; pigmentation.