Aghayan Shabnam, Fallah Samaneh, Chiniforush Nasim
Department of Periodontology, Faculty of Dentistry, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran.
Faculty of Dentistry, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran.
J Lasers Med Sci. 2021 Oct 19;12:e63. doi: 10.34172/jlms.2021.63. eCollection 2021.
Recently, the management of dentin hypersensitivity by lasers has gained special attention. This study aimed to assess and compare the efficacy of the 980 nm diode, Nd:YAG and Er:YAG lasers accompanied by fluoride in dentinal tubule obstruction. Twenty sound single-rooted human teeth were used for this invitro study. Forty dentinal discs were prepared of the roots and etched with 6% citric acid. One layer of fluoride varnish was applied over their surface. The sections were randomly allocated into 4 groups. The control group received no laser irradiation. Group 2 underwent 980 nm diode laser irradiation with 0.5 W power. Group 3 underwent Nd:YAG laser irradiation with 0.5 W power and group 4 underwent Er:YAG laser irradiation with 0.5 W power. All samples were then inspected under a scanning electron microscope, and the number of obstructed dentinal tubules and the diameter of open dentinal tubules in the field were determined. One-way ANOVA and Tukey's test were used for data analysis at a significance level of 0.05. All three laser types decreased the number of open dentinal tubules significantly compared to the control group (<0.05). No significant difference was noted in dentinal tubule obstruction between the three laser groups (>0.05). The diameter of open tubules in the three laser groups did not show a significant difference from that in the control group. All three types of lasers evaluated in this study can effectively obstruct the dentinal tubules.
最近，激光治疗牙本质过敏症受到了特别关注。本研究旨在评估和比较980纳米二极管激光、钕:钇铝石榴石激光和铒:钇铝石榴石激光联合氟化物在阻塞牙本质小管方面的疗效。本体外研究使用了20颗健康的单根人牙。从牙根制备了40个牙本质盘，并用6%的柠檬酸进行蚀刻。在其表面涂覆一层氟化物清漆。将切片随机分为4组。对照组未接受激光照射。第2组接受功率为0.5瓦的980纳米二极管激光照射。第3组接受功率为0.5瓦的钕:钇铝石榴石激光照射，第4组接受功率为0.5瓦的铒:钇铝石榴石激光照射。然后在扫描电子显微镜下检查所有样本，并确定视野中阻塞牙本质小管的数量和开放牙本质小管的直径。采用单因素方差分析和Tukey检验进行数据分析，显著性水平为0.05。与对照组相比，所有三种激光类型均显著减少了开放牙本质小管的数量（<0.05）。三个激光组之间在牙本质小管阻塞方面未观察到显著差异（>0.05）。三个激光组中开放小管的直径与对照组相比未显示出显著差异。本研究中评估的所有三种激光类型均可有效阻塞牙本质小管。
