Analysis of the marginal sealing of restorations after cavity preparation performed with laser Er,Cr:YSGG using different parameters in dentin / Análise do selamento marginal de restaurações realizadas após preparo cavitário com laser de Er;Cr:YSGG utilizando diferentes parâmetros em dentina hígida

AUTOR(ES)
DATA DE PUBLICAÇÃO

2010

RESUMO

The aim of this work was to evaluate dye penetration of Class V restorations in cavity preparations obtained with different power setting of an Er;Cr:YSGG laser or with diamond bur and high-speed handpiece. Sixty samples of dentin were divided into six groups (n=10). The first group served as a control with standardized diamond bur cut (G1); the other groups were irradiated with an Er;Cr:YSGG laser with different power parameters: G2- 2.0W; G3- 2.25W; G4- 2.5W; G5- 2.75W; G6- 3.0W. This laser emitting at a wavelength of 2.78m and had pulse duration of 140m and fixed pulse repetition rate of 20Hz. Laser energy was delivered through a fiberoptic system to a sapphire tip terminal 6mm long and 600m in diameter, using non-contact mode. Self-etching adhesive system (Clearfil SE Bond- Kuraray, Japan) and microhybrid composite resin (Z-250, 3M/ESPE, St. Paul, USA) were used to compose the samples. After restoration, specimens were submitted to a microleakage test with 2% methylene blue solution at pH 7.0, for 4 h at 37°C. Results showed no statistical difference (p=0.203) between experimental groups in which cavity preparations were performed by diamond bur or different power settings of Er;Cr:YSGG laser. From the present study, it can be concluded that microleakage were similar to all experimental groups irrespective of the Class V cavity preparation method used - Er;Cr:YSGG laser system or diamond bur.

ASSUNTO(S)

dentin microleakage cr:ysgg dentina er microinfiltração cr:ysgg er

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