Özet:

Objectives: The aim of this study was to compare the bond strengths of Class V cavities prepared by laser treatment or conventional methods and restored with different adhesive systems. Materials and Methods: Fourty-eight premolars were randomly divided into two groups. In first group, cavities were prepared with Er:YAG laser; in the second group, cavities were prepared with the conventional method. Each group was divided in three subgroups according to the adhesive system (Clearfil Se Bond, Silorane, Futurabond). After termocycled for 1000 cycles, the microtensile test was performed in a universal testing machine. Data were analyzed by two way ANOVA and post hoc Tukey’s tests (p<0.05). Result: Results were as follows: Laser-Silorane (21.1±6.92 MPa); Conventional-Silorane (21.09±3.72 MPa); Laser-Futurabond (20.77±5.26 MPa); Conventional-Futurabond (19.01±3.89 MPa); Laser-Clearfil (24.14±5.4); Conventional-Clearfil (28.78±5.98). There are statistically significant differences between the adhesives for the tested parameters (p<0.05). Clearfil Se Bond presented significantly the highest, Silorane and Futurabond presented the lowest, wheras no significant differences were detected between these two (p<0.05). Regardless of the materials used, there were no significant differences between the laser and the conventional cavities. Conclusion: Er:YAG did not significantly improved the bond strength of adhesive systems. The application of Clearfil Se Bond to laser or conventional prepared dentin was found the most effective method.

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