Morphologic assessment of dental surface/ glass ionomer cement interface: influence of Er:YAG laser pretreatment
RSBO (Impr.)
;
9(4): 282-287, Oct.-Dec. 2012. ilus, tab
Artigo
em Inglês
| LILACS
| ID: lil-755714
ABSTRACT
Introduction and objective:
The aim of this study was to assess the surface and the substrate/glass ionomer cement (GIC) interface after ErYAG laser irradiation by means of scanning electron microcopy. Material andmethods:
Thirty human third molars were selected and had their roots removed. Crowns were sectioned to obtain discs that were randomly assigned to three groups according to the surface pretreatment 40% polyacrylic acid (control); ErYAG laser irradiation (80mJ/2Hz) or ErYAG laser followed by 40% polyacrylic acid. Two discs of each group were put aside to the surface analysis and the others were bisected. One half received Ketac-Fil and the other received Fuji II LC. Specimens were prepared for SEM and were analyzed under different magnifications.Results:
ErYAG laser group showed no adhesive interface for both enamel and dentin, but strongly damaged the interface build-up for dentin/Fuji II LC. The application of laser irradiation followed by the polyacrylic acid exhibited gaps and irregularities for both substrates.Conclusion:
ErYAG laser irradiation combined or not with 40% polyacrylic acid produced a surface unfavorable for GIC interaction, especially for the resin-modified ones.
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Idioma:
Inglês
Revista:
RSBO (Impr.)
Assunto da revista:
Odontologia
Ano de publicação:
2012
Tipo de documento:
Artigo
País de afiliação:
Brasil
Instituição/País de afiliação:
University of São Paulo/BR
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