Influence of etching with erbium, chromium:yttrium-scandium-gallium-garnet laser on microleakage of class V restoration

Author(s)

Marotti, Juliana ^{[1, 2]} ; Geraldo-Martins, Vinicius Rangel ^[1] ; Bello-Silva, Marina Stella ^[1] ; Eduardo, Carlos de Paula ^[1] ; Apel, Christian ^[3] ; Gutknecht, Norbert ^[3]

Affiliation

^[1] Univ Sao Paulo, Sch Dent, Dept Restorat Dent, Special Lab Lasers Dent LELO, BR-05508000 Sao Paulo - Brazil

^[2] Univ Sao Paulo, Sch Dent, Dept Prosthodont, BR-05508000 Sao Paulo - Brazil

^[3] Univ Hosp Aachen, Dept Conservat Dent Periodontol & Prevent Dent, Aachen - Germany

• Document type: Journal article
• Source: Lasers in Medical Science; v. 25, n. 3, p. 325-329, MAY 2010.
• Web of Science Citations: 15

Abstract

The aim of this in vitro study was to evaluate some parameters of dental etching when irradiated with an erbium, chromium:yttrium-scandium-gallium-garnet (Er,Cr:YSGG) laser. One-hundred sound human third molars were selected and randomly distributed into ten groups (n = 10). The class V cavities of group 1 (control) were prepared with a bur and etched with 37% phosphoric acid, while groups G2 to G10, were prepared with laser (5 W, 88.46 J/cm(2), 90/70% air/water) and etched with the following powers: G3 and G4, 0.25 W; G5 and G6, 0.5 W; G7 and G8, 0.75 W; G9 and G10, 1 W. Group G2 received no laser etching. Prior to restoration, G2, G4, G6, G8 and G10 received acid etching. After restoration, all samples were submitted to a microleakage test. According to statistical analysis (Kruskal-Wallis and Dunn's tests), G10 presented the lowest microleakage values (P < 0.05). The other groups showed no differences between them. Etching with Er,Cr:YSGG laser (1 W) followed by phosphoric acid was effective in reducing the microleakage of class V restorations. (AU)

• FAPESP's process: 98/14270-8 - Center for Optical and Photonics Science
• Grantee: Vanderlei Salvador Bagnato
• Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC