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RPG. Revista de Pós-Graduação

versão impressa ISSN 0104-5695

Resumo

BARCELLOS, Daphne Câmara et al. Evaluation of hardness of the silorane-based composite resin cured with different photoactivators and after use of mouthwashes. RPG, Rev. pós-grad. [online]. 2011, vol.18, n.4, pp. 253-259. ISSN 0104-5695.

This study evaluated the microhardness of silorane-based composite resin cured with halogen light and LED, followed by the use of mouthwashes: Periogard, Listerine, and Colgate Plax Without Alcohol. Forty specimens were fabricated with silorane-based composite resin Filtek P90 and divided into two groups (n = 20): Group LED - LED light curing for 40 s (1200 mW/cm2), Group HL - Halogen light curing for 40 s (600 mW/cm2). The specimens were divided into four subgroups (n-5) in accordance with the use of the mouthwash: Subgroup C - immersed in artificial saliva for 7 days; Subgroup LI - Listerine mouthwash once daily for 1 minute during 7 days, then stored in artificial saliva; Subgroup CP - Colgate Plax Without Alcohol mouthwash, following the same protocol above; Subgroup PE - Periogard mouthwash, following the same protocol above. The specimens were subjected to microhardness test on digital Microhardness Vickers with three indentations and load of 50 g/ 15 s. The data were submitted to ANOVA two factors (Light and Mouthwash) and Tukey (5%). There were significant differences for the factors Light and Mouthwash (p = 0.00). The values of microhardness for Light Factor: LED Group - to 72.61 a and Group HL - 67.21 b; for Mouthwash Factor: Subgroup C - 79.29 a; subgroup PL - to 75.5 a; subgroup EP - 66.12 b; Subgroup LI - 58.75 c. For Light Factor, LED showed hardness higher than halogen light. For Mouthwash Factor, storage in artificial saliva showed higher hardness compared to the use of Listerine and Periogard mouthwashes.

Palavras-chave : Hardness; Composite resins; Polymerization; Saliva, artificial.

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