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

Published online by Cambridge University Press:  04 October 2010

Marcos Aurélio Bomfim da Silva
Affiliation:
Departamento de Odontologia Restauradora, Faculdade de Odontologia de Piracicaba, Universidade Estadual de Campinas, 13414-903, Piracicaba-SP, Brazil
Guilherme José Pimentel Lopes de Oliveira*
Affiliation:
Departamento de Diagnóstico e Cirurgia, Faculdade de Odontologia de Araraquara, Universidade Estadual Paulista, 14801-140 Araraquara-SP, Brazil
Josealdo Tonholo
Affiliation:
Instituto de Química e Biotecnologia, Universidade Federal de Alagoas, Campus A. C. Simões, Tabuleiro do Martins, 57072-970 Maceió-AL, Brazil
José Ginaldo da Silva Júnior
Affiliation:
Instituto de Química e Biotecnologia, Universidade Federal de Alagoas, Campus A. C. Simões, Tabuleiro do Martins, 57072-970 Maceió-AL, Brazil
Lucineide de Melo Santos
Affiliation:
Faculdade de Odontologia, Universidade Federal de Alagoas, Campus A. C. Simões, Tabuleiro do Martins, 57072-970 Maceió-AL, Brazil
José Ivo Limeira dos Reis
Affiliation:
Faculdade de Odontologia, Universidade Federal de Alagoas, Campus A. C. Simões, Tabuleiro do Martins, 57072-970 Maceió-AL, Brazil
*
Corresponding author. E-mail: guioliveiraodonto@hotmail.com
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Abstract

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 × 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.

Type
Atomic Force Microscopy Biological Applications
Copyright
Copyright © Microscopy Society of America 2010

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References

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