BOND STRENGTH OF THE UNIVERSAL ADHESIVE TO DENTIN WITH DIFFERENT SURFACE TREATMENTS

Aim: the aim of this study was to evaluate shear bond strengths of new universal adhesive within selfetch and etch-and-rinse strategies on erbium, chromium doped yttrium scandium gallium garnet (er,cr:ysgg) laser irradiation dentin surface. materials and methods: 60 sound, human third molars were selected and the occlusal enamel of these molars was removed. those teeth were divided into six groups according to the surface conditioning; group a: control (self-etch mode), group b: 35% phosphoric acid etching (etch-and-rinse mode), group c: 1,25w er,cr:ysgg laser irradiation, group d: 1,5w er,cr:ysgg laser irradiation, group e: 2w er,cr:ysgg laser irradiation, finally, group f: 3w er,cr:ysgg laser irradiation. after surface conditioning, new universal adhesive (3m single bond universal, 3m espe st.paul, mn, usa - sbu) was applied to all dentin samples surface and resin composite (z250 3m espe st.paul, mn, usa) built up and shear bond strength test was performed. data were analyzed using one-way anova and tukey hsd multiple compression test. p<0.05 was consider statistically significant. results: prior to phosphoric acid etching significantly increased the bonding effectiveness of the sbu to dentin. (p<0.05). however, er,cr:ysgg laser irradiation was decreased the bond strength values of sbu with all power settings. conclusion: while using etch-and-rinse mode definitely improved bonding of the new universal adhesive to dentin, er,cr:ysgg laser irradiation cannot be considered as an alternative for surface treatment methods.