ABSTRACT
Introduction: The aim of this study was to evaluate the composite surface treated by different powers of Erbium-Doped Yttrium Aluminum Garnet [Er:YAG] laser in comparison with bur preparation via scanning electron microscope. Methods: Fourteen composite resin blocks with 15× 10 × 10 mm dimensions were used in this study. The samples were divided to seven groups as follow: Group 1 [power: 1 W, Energy: 50 m/l]; Group 2 [power: 2 W, Energy: 100 m/l]; Group 3 [power: 3W, Energy: 150 m/l]; Group 4 [power: 4 W, Energy: 200 m/l]; Group 5 [power: 5W, Energy: 250 m/l]; Group 6 [power: 6 W, Energy: 300 m/l]; Group 7: Diamond bur. Then, the samples were prepared for SEM examination. Results: The surface treated by Er:YAG laser showed irregular and micro porous surface. Conclusion: It seems that composite surface treatment by Er:YAG laser can be an alternative method for composite repair if suitable parameters are used