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
Article
in English
| 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.
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
Similar
MEDLINE
...
LILACS
LIS