Effect of different surface treatments on bond strength of different resin cements to lithium disilicate glass ceramic: an in vitro study

Abstract

The aim of this study was to evaluate the bond strength of different resin cements in lithium disilicate glass ceramics on which different surface treatments are used. For this study, 120 unit IPS e.max Press samples were prepared for the bond strength test. Samples were randomly divided into six groups. The following treatments were applied on ceramic surfaces: (1) control (no surface treatment), (2) hydrofluoric acid (HF), (3) sandblasting (Al2O3 powder), (4) Co-Jet (silica-coated Al2O3 powder), (5) Er:YAG (erbium-doped yttrium aluminium garnet) laser and (6) Nd:YAG laser (neodymium-doped yttrium aluminium garnet). SEM (scanning electron microscopy) was performed on one sample from each group. Dual-cure resin cement was stuck on half of the samples prepared, and self-cure resin cement was stuck on the other half of the samples, and shear strength was applied until breakage occurred. The data was analyzed with variance analysis (ANOVA). According to the results from the bond strength tests, dual-cure and self-cure resin cements showed statistically significantly higher bond strength in the samples on which Co-Jet was applied, while the least bond strength was observed in the samples in the control group. Additionally, self-cure resin cement showed significantly higher bond strength values than dual-cure resin cement. Different surface treatments affect the bonding of different resin cement to IPS e.max Press.

Keywords

• Lithium disilicate glass ceramic
• resin cement
• bond strength