Effect of laser treatment on surface morphology of indirect composite resin: scanning electron microscope [SEM] evaluation

ABSTRACT

The aim of this study was to evaluate and compare the Scanning electron microscope [SEM] of indirect composite conditioned by Erbium-Doped Yttrium Aluminum Garnet [ErYAG] laser, Neodymium-Doped Yttrium Aluminium Garnet [NdYAG] laser and Carbon Dioxide [CO[2]] laser. 18 indirect composite blocks [GC Gradia DA2, Japan] with 15 x 10 x 10 mm dimensions were made. The bonding surface of these blocks were polished, then the samples were divided into six groups as follow ErYAG laser with output power of 0.5 W and frequency of 10 Hz, NdYAG laser with output power of 0.25, 0.5 W and frequency of 10 Hz, CO[2] laser with output power of 0.5 W and frequency of 10 Hz and 5 Hz, and no treatment. Then, the surfaces were evaluated by SEM. Irregularities were observed in ErYAG laser samples compared to control group that produced suitable retention for adhesion of cements. NdYAG and CO[2] lasers showed melting areas. Among different lasers, ErYAG laser can be used as an alternative technique for surface treatment of indirect composites