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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 ,
Guilherme José Pimentel Lopes de Oliveira ,
Josealdo Tonholo ,
José Ginaldo da Silva Júnior ,
Lucineide de Melo Santos  and
José Ivo Limeira dos Reis
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: [email protected]
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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.

Keywords

dental marginal adaptationdental curing lightatomic force microscopycomposite resinlasersdental surface analysis
Type
Atomic Force Microscopy Biological Applications
Information
Microscopy and Microanalysis , Volume 16 , Issue 6 , December 2010 , pp. 779 - 784
Copyright
Copyright © Microscopy Society of America 2010

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