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Morphologic assessment of dental surface/ glass ionomer cement interface: influence of Er:YAG laser pretreatment
Souza-Gabriel, Aline Evangelista; Chimello-Sousa, Daniela Thomazatti; Palma-Dibb, Regina Guenka; Pécora, Jesus Djalma; Corona, Silmara Aparecida Milori.
  • Souza-Gabriel, Aline Evangelista; University of São Paulo. Ribeirão Preto School of Dentistry. Department of Restorative Dentistry. Ribeirão Preto. BR
  • Chimello-Sousa, Daniela Thomazatti; University of São Paulo. Ribeirão Preto School of Dentistry. Department of Restorative Dentistry. Ribeirão Preto. BR
  • Palma-Dibb, Regina Guenka; University of São Paulo. Ribeirão Preto School of Dentistry. Department of Restorative Dentistry. Ribeirão Preto. BR
  • Pécora, Jesus Djalma; University of São Paulo. Ribeirão Preto School of Dentistry. Department of Restorative Dentistry. Ribeirão Preto. BR
  • Corona, Silmara Aparecida Milori; University of São Paulo. Ribeirão Preto School of Dentistry. Department of Restorative Dentistry. Ribeirão Preto. BR
RSBO (Impr.) ; 9(4): 282-287, Oct.-Dec. 2012. ilus, tab
Article in English | LILACS-Express | LILACS | ID: lil-755714
Responsible library: BR97.1
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 and

methods:

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.
Full text: Available Index: LILACS (Americas) Language: English Journal: RSBO (Impr.) Journal subject: Dentistry Year: 2012 Type: Article Affiliation country: Brazil Institution/Affiliation country: University of São Paulo/BR

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Full text: Available Index: LILACS (Americas) Language: English Journal: RSBO (Impr.) Journal subject: Dentistry Year: 2012 Type: Article Affiliation country: Brazil Institution/Affiliation country: University of São Paulo/BR