Research Information System
SCANNING, vol.37, no.3, pp.186-192, 2015 (SCI-Expanded)
This study investigated the effects of different surface treatments on the repair bond strength of yttrium-stabilized tetragonal zirconia polycrystalline ceramic (Y-TZP) zirconia to a composite resin. Sixty Y-TZP zirconia specimens were prepared and randomly divided into six groups (n=10) as follows: Group 1, surface grinding with Cimara grinding bur (control); Group 2, sandblasted with 30 mu m silica-coated alumina particles; Group 3, Nd:YAG laser irradiation; Group 4, Er,Cr:YSGG laser irradiation; Group 5, sandblasted+Nd:YAG laser irradiation; and Group 6, sandblasted+Er,Cr:YSGG laser irradiation. After surface treatments, the Cimara((R)) System was selected for the repair method and applied to all specimens. A composite resin was built-up on each zirconia surface using a cylindrical mold (5x3mm) and incrementally filled. The repair bond strength was measured with a universal test machine. Data were analyzed using a one-way ANOVA and a Tukey HSD test (p=0.05). Surface topography after treatments were evaluated by a scanning electron microscope (SEM). Shear bond strength mean values ranged from 15.896 to 18.875MPa. There was a statistically significant difference between group 3 and the control group (p<0.05). Also, a significant increase in bond strength values was noted in group 6 (p<0.05). All surface treatment methods enhanced the repair bond strength of the composite to zirconia; however, there were no significant differences between treatment methods. The results revealed that Nd:YAG laser irradiation along with the combination of sandblasting and Er,Cr:YSGG laser irradiation provided a significant increase in bond strength between the zirconia and composite resin. SCANNING 37:186-192, 2015. (c) 2015 Wiley Periodicals, Inc.