Micro-shear bond strength of resin cements to Er, Cr: YSGG laser and/or acid etched enamel

Cengiz Yanardag, Esra

The purpose of this study was to evaluate the effect of Er,Cr:YSGG laser irradiation and/ or acid etching on the micro-shear bond strength (µSBS) of two different dual-cured resin cements to human enamel. 24 intact, extracted molars were sectioned longitudinally and randomly divided into three subgroups according to three surface pretreatment methods: (1) Er,Cr:YSGG laser (Waterlase MD, Biolase) irradiation was used with a power setting of 2 W (55% water and 65% air), and a repetition rate of 20 Hz for 10s; (2) 37% phosphoric acid application for 20s; (3) Re-etching with phosphoric acid for 20s after the Er,Cr:YSGG laser irradiation as in group1. 12 enamel discs for each of the resin cements (Panavia F2.0 and Variolink N) were prepared and three cylinders of resin cements were bon...