In vitro evaluation of enamel microhardness adjacent to restorations after cariogenic challenge

Authors

  • Talitha Rodrigues Ribeiro Universidade Federal da Paraíba
  • Rosângela Marques Duarte Universidade Federal da Paraíba
  • Fábia Danielle Sales Cunha Medeiros e Silva Universidade Federal da Paraíba
  • Franklin Delano Soares Forte Universidade Federal da Paraíba
  • Fábio Correia Sampaio Universidade Federal da Paraíba
  • Juliana Karla Guedes Barbosa Universidade Federal da Paraíba

Keywords:

Caries inhibition, fluoride, glass-ionomer cements

Abstract

Purpose: This in vitro study used microhardness testing to assess the enamel demineralization induced by artificial caries lesions adjacent to restorative materials. Methods: Two conventional (MAXXION R® and VIDRION R®) and one resin-modified (VITREMER®) glass ionomer cements and one non-fluoridated composite resin (Z-250®) were tested. Standard cavities were prepared in 160 bovine enamel blocks. The enamel blocks were randomly divided into 4 experimental groups (n=40) according to the material used. After the initial microhardness measurement, the enamel blocks were restored and subjected to thermal and pH cycling, simulating cariogenic challenge. Microhardness measurements were performed on the enamel blocks to calculate the loss of enamel surface hardness. Data were analyzed by analysis of variance and Tukey test (α<0.05). Results: The descending sequence of loss of enamel surface hardness adjacent to the restoration was: Z-250 = VITREMER > VIDRION R > MAXXION R. Conclusion: The enamel adjacent to the conventional glass ionomer cements showed less demineralization than the enamel adjacent to resin-modified materials. Key words: Caries inhibition; fluoride; glass-ionomer cements

Author Biographies

Talitha Rodrigues Ribeiro, Universidade Federal da Paraíba

Mestre em Odontologia (Odontologia Preventiva e Infantil) pela Universidade Federal da Paraíba.

Rosângela Marques Duarte, Universidade Federal da Paraíba

Mestre e Doutora em Materiais Dentários pela Universidade Estadual de Campinas (UNICAMP). Especialista em Residência em Dentística pela FORP (USP). Professora adjunta da disciplina de Materiais Dentários (Departamento de Odontologia Restauradora - Universidade Federal da Paraíba).

Fábia Danielle Sales Cunha Medeiros e Silva, Universidade Federal da Paraíba

Mestre em Odontologia (Odontologia Preventiva e Infantil) pela Universidade Federal da Paraíba. Professora assistente da Escola Técnica de Saúde da Universidade Federal da Paraíba.

Franklin Delano Soares Forte, Universidade Federal da Paraíba

Mestre em Odontologia pela Universidade Federal de Santa Catarina (UFSC). Doutor em Odontologia Preventiva e Social pela Universidade Estadual Paulista Júlio de Mesquita Filho (UNESP). Professor adjunto da Disciplina de Odontologia Social (Departamento de Odontologia Clínica e Social - Universidade Federal da Paraíba).

Fábio Correia Sampaio, Universidade Federal da Paraíba

Mestre em Odontologia (Odontologia Social) pela Universidade Federal Fluminense (UFF). Doutor em Cariologia pela Universidade de Oslo (UIO, Noruega). Professor adjunto da disciplina de Cariologia (Departamento de Odontologia Clínica e Social - Universidade Federal da Paraíba).

Juliana Karla Guedes Barbosa, Universidade Federal da Paraíba

Aluna de graduação em Odontologia pela Universidade Federal da Paraíba.

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Published

2008-08-19

Issue

Vol. 24 No. 1 (2009)

Section

Original Article

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