Effect of the Insertion and Polymerization Technique in Composite Resin Restorations: Analysis of Marginal Gap by Atomic Force Microscopy

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Data

2010-12-01

Autores

Bomfim da Silva, Marcos Aurelio
Pimentel Lopes de Oliveira, Guilherme Jose [UNESP]
Tonholo, Josealdo
da Silva Junior, Jose Ginaldo
Santos, Lucineide de Melo
Limeira dos Reis, Jose Ivo

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Editor

Cambridge University Press

Resumo

This in vitro study evaluated the marginal gap at the composite tooth/resin interface in class V cavities under the influence of two insertion techniques and a curing system by means of atomic force microscopy (AFM). Forty enamel and dentin cavities were prepared on the buccal surface in bovine teeth with quadratic forms measuring 2 mm X 2 mm and depth of 1.5 mm. The teeth were then divided into four groups: group A, 10 cavities were restored in one increment, light cured by halogen light; group B, 10 cavities filled with bulk filling, light cured by the light emitting diodes (LED); group C, 10 cavities were restored by the incremental technique, light cured by halogen light; group D, 10 cavities were restored by the incremental technique, light cured by the LED. The teeth underwent the polishing procedure and were analyzed by AFM for tooth/restoration interface evaluation. The data were compared between groups using the nonparametric Kruskall-Wallis and Mann-Whitney tests (p < 0.05). The results showed a statistically significant difference between groups A and B and groups A and C. It was concluded that no insertion and polymerization technique was able to completely seal the cavity.

Descrição

Palavras-chave

dental marginal adaptation, dental curing light, atomic force microscopy, composite resin, lasers, dental surface analysis

Como citar

Microscopy and Microanalysis. New York: Cambridge Univ Press, v. 16, n. 6, p. 779-784, 2010.