Ozer, TorunBasaran, GuevencBerk, Nuekhet2024-04-242024-04-2420080889-54061097-6752https://doi.org/10.1016/j.ajodo.2006.04.055https://hdl.handle.net/11468/15082Introduction: The purposes of this study were to assess the shear bond strength, the surface characteristics, and the adhesive remnant index scores of teeth prepared for bonding with erbium, chromium doped: yttrium-scandium-gallium-garnet (Er, Cr: YSGG) laser etching, and to compare laser etching with phosphoricacid etching and a self-etching primer. Methods: Sixty-four premolars, extracted for orthodontic purposes, were randomly divided into 4 groups, and a different method was used to prepare the tooth enamel in each group for bonding: irradiation for 15 seconds with a 0.75-W Er, Cr: YSGG laser; irradiation for 15 seconds with a 1.5-W Er, Cr: YSGG laser; etching with 37% phosphoric acid; application of a self-etching primer. After surface preparation, standard edgewise stainless steel premolar brackets were bonded; 1 tooth in each group was not bonded and was examined under a scanning electron microscopic. The brackets were debonded 24 hours later; shear bond strengths were measured, and adhesive remnant index scores were recorded. Results: Irradiation with the 0.75-W laser produced lower shear bond strengths than the other methods. No statistically significant differences were found between 1.5-W laser irradiation, phosphoric-acid etching, and self-etching primer. Adhesive remnant scores were compared with the chi-square test, and statistically significant differences were found between all groups; when the 0.75-W laser irradiation group was excluded, no statistically significant differences were observed. Conclusions: Irradiation with a 1.50-W laser produced sufficient etching for orthodontic bonding, but irradiation with the 0.75-W laser did not.eninfo:eu-repo/semantics/closedAccess[No Keyword]Article1342193197WOS:0002581040000132-s2.0-480490898441867519910.1016/j.ajodo.2006.04.055Q1Q3