Hosseini Mohammad Hashem, Hassanpour Mehdi, Etemadi Ardavan, Ranjbar Omrani Ladan, Darvishpour Hojat, Chiniforush Nasim
Department of Orthodontics, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran.
Department of Orthodontics, School of Dentistry, Qom University of Medical Sciences, Qom, Iran.
J Lasers Med Sci. 2015 Fall;6(4):171-3. doi: 10.15171/jlms.2015.14. Epub 2015 Oct 27.
The purpose of this study was to evaluate amalgam surfaces treated by different output powers of erbium-doped yttrium aluminum garnet (Er:YAG) laser by scanning electron microscope (SEM).
Twenty-one amalgam blocks (8 mm × 8 mm, 3 mm thickness) were prepared by condensing silver amalgam (into putty impression material. After keeping them for 24 hours in distilled water, they were divided into 7 groups as follow: G1: Er:YAG laser (1 W, 50 mJ), G2: Er:YAG laser (2 W, 100 mJ), G3: Er:YAG laser (3 W, 150 mJ), G4: Sandblast, G5: Sandblast + Er:YAG laser (1 W, 50 mJ), G6: Sandblast +Er:YAG laser (2 W, 100 mJ) and G7: Sandblast +Er:YAG laser (3 W, 150 mJ). Then after preparation of all samples, they were examined by SEM.
The SEM results of amalgam surfaces treated by different output powers of Er:YAG laser showed some pitting areas with non-homogenous irregularities Conclusion: It seems that the application of sandblasting accompanied by Er:YAG laser irradiation can provide proper surface for bonding of orthodontic brackets.
本研究的目的是通过扫描电子显微镜（SEM）评估经不同输出功率的掺铒钇铝石榴石（Er:YAG）激光处理后的汞合金表面。
通过将银汞合金冷凝到油灰印模材料中制备21个汞合金块（8毫米×8毫米，3毫米厚）。在蒸馏水中保存24小时后，将它们分为7组，如下：G1：Er:YAG激光（1瓦，50毫焦），G2：Er:YAG激光（2瓦，100毫焦），G3：Er:YAG激光（3瓦，150毫焦），G4：喷砂，G5：喷砂+Er:YAG激光（1瓦，50毫焦），G6：喷砂+Er:YAG激光（2瓦，100毫焦），G7：喷砂+Er:YAG激光（3瓦，150毫焦）。然后在制备所有样品后，通过SEM对它们进行检查。
经不同输出功率的Er:YAG激光处理后的汞合金表面的SEM结果显示出一些有不均匀不规则现象的麻点区域。结论：似乎喷砂并伴有Er:YAG激光照射的应用可以为正畸托槽的粘结提供合适的表面。
