Amid Reza, Gholami Gholam Ali, Mojahedi Masoud, Aghalou Maryam, Gholami Mohsen, Mirakhori Mahdieh
Deptartment of Periodontics, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
Dental Research Center, Research Institute of Dental Sciences, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
J Lasers Med Sci. 2017 Spring;8(2):66-71. doi: 10.15171/jlms.2017.12. Epub 2017 Mar 28.
The efficacy of erbium-doped yttrium aluminum garnet (Er:YAG) laser for root debridement in comparison with curettes has been the subject of many recent investigations. Considering the possibility of chemical and ultra-structural changes in root surfaces following laser irradiation, this study sought to assess the effects of scaling and root planing (SRP) with curettes and Er:YAG laser on chemical properties and ultrastructure of root surfaces using spectroscopy and scanning electron microscopy (SEM). In this in vitro experimental study, extracted sound human single-rooted teeth (n = 50) were randomly scaled using manual curettes alone or in conjunction with Er:YAG laser at 100 and 150 mJ/pulse output energies. The weight percentages of carbon, oxygen, phosphorous and calcium remaining on the root surfaces were calculated using spectroscopy and the surface morphology of specimens was assessed under SEM. Data were analyzed using one-way analysis of variance (ANOVA). No significant differences ( > 0.05) were noted in the mean carbon, oxygen, phosphorous and calcium weight percentages on root surfaces following SRP using manual curettes with and without laser irradiation at both output energies. Laser irradiation after SRP with curettes yielded rougher surfaces compared to the use of curettes alone. Although laser irradiation yielded rougher surfaces, root surfaces were not significantly different in terms of chemical composition following SRP using manual curettes with and without Er:YAG laser irradiation. Er:YAG laser can be safely used as an adjunct to curettes for SRP.
与刮治器相比，掺铒钇铝石榴石（Er:YAG）激光用于牙根清创的疗效是近期许多研究的主题。考虑到激光照射后牙根表面可能发生化学和超微结构变化，本研究旨在使用光谱学和扫描电子显微镜（SEM）评估刮治器和Er:YAG激光进行龈下刮治术（SRP）对牙根表面化学性质和超微结构的影响。在这项体外实验研究中，将拔除的完好人类单根牙（n = 50）随机分组，分别单独使用手动刮治器或在100和150 mJ/脉冲输出能量下结合Er:YAG激光进行刮治。使用光谱学计算牙根表面剩余的碳、氧、磷和钙的重量百分比，并在SEM下评估标本的表面形态。数据采用单因素方差分析（ANOVA）进行分析。在两种输出能量下，无论有无激光照射，使用手动刮治器进行SRP后，牙根表面碳、氧、磷和钙的平均重量百分比均无显著差异（> 0.05）。与单独使用刮治器相比，刮治器SRP后进行激光照射产生的表面更粗糙。尽管激光照射产生的表面更粗糙，但无论有无Er:YAG激光照射，使用手动刮治器进行SRP后牙根表面的化学成分没有显著差异。Er:YAG激光可安全地用作刮治器进行SRP的辅助工具。
