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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Adhesives bonded to erbium:yttrium-aluminum-garnet laser-irradiated dentin: transmission electron microscopy, scanning electron microscopy and tensile bond strength analyses

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Author(s):
Bastos Ramos, Andreia Cristina [1, 2] ; Esteves-Oliveira, Marcella ; Arana-Chavez, Victor E. [3] ; Eduardo, Carlos de Paula [1]
Total Authors: 4
Affiliation:
[1] Univ Sao Paulo, Dept Restorat Dent, Sch Dent, Special Lab Lasers Dent, BR-05508900 Sao Paulo - Brazil
[2] Univ Fortaleza, Sch Dent, Fortaleza, CE - Brazil
[3] Univ Sao Paulo, Lab Mineralized Tissue Biol, Dept Cell & Dev Biol, Inst Biomed Sci, BR-05508900 Sao Paulo - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Lasers in Medical Science; v. 25, n. 2, p. 181-189, MAR 2010.
Web of Science Citations: 23
Abstract

The aim of this in vitro study was to investigate the effect of erbium:yttrium-aluminum-garnet (Er:YAG) laser irradiation on dentinal collagen by transmission electron microscopy and to analyze the resin-dentin interface by scanning electron microscopy. A tensile bond strength test was also applied. Specimens from 69 sound human third molars were randomly divided into three groups: control (no laser), and two irradiated groups, laser 250 (250 mJ/2 Hz) and laser 400 (400 mJ/4 Hz). Then, specimens were restored with two adhesive systems, an etch-and-rinse or a self-etch system. Although ultrastructural examination showed a modified surface in the irradiated dentin, there was no statistical difference in bond strength values between the laser groups and controls (P < 0.05). In conclusion, the use of Er:YAG laser for ablating human dentin did not alter the main adhesion parameters when compared with those obtained by conventional methods, thus reinforcing its use in restorative dentistry. (AU)