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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.)

Adhesion after erbium, chromium:yttrium-scandium-gallium-garnet laser application at three different irradiation conditions

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Botta, Sergio Brossi [1] ; da Ana, Patricia Aparecida [2] ; Zezell, Denise Maria [2] ; Powers, John M. [3] ; Matos, Adriana Bona [1]
Total Authors: 5
[1] Univ Sao Paulo, Sch Dent, Dept Operat Dent, BR-05508000 Sao Paulo - Brazil
[2] IPEN CNEN SP, Ctr Lasers & Applicat, Sao Paulo - Brazil
[3] Univ Texas Houston, Houston Biomat Res Ctr, Dent Branch, Houston, TX - USA
Total Affiliations: 3
Document type: Journal article
Source: Lasers in Medical Science; v. 24, n. 1, p. 67-73, JAN 2009.
Web of Science Citations: 24

The aim of this study was to investigate whether distinct cooling of low fluence erbium, chromium:yttrium-scandium-gallium-garnet (Er,Cr:YSGG) laser irradiation would influence adhesion. Main factors tested were: substrates (two), irradiation conditions (three), and adhesives (three). A 750 mu m diameter tip was used, for 50 s, 1 mm from the surface, with a 0.25 W power output, 20 Hz, energy density of 2.8 J/cm(2) with energy per pulse of 12.5 mJ. When applied, water delivery rate was 11 ml/min. The analysis of variance (ANOVA) showed that laser conditioning significantly decreased the bond strength of all adhesive systems applied on enamel. On dentin, laser conditioning significantly reduced bond strength of etch-and-rinse and one-step self-etch systems; however, laser irradiation under water cooling did not alter bonding of two-step self-etching. It may be concluded that the irradiation with Er,Cr:YSGG laser at 2.8 J/cm(2) with water coolant was responsible for a better adhesion to dentin, while enamel irradiation reduced bond strength, irrespective of cooling conditions. (AU)