Sousa Marinês Vieira da Silva, Scanavini Marco Antonio, Sannomiya Eduardo Kazuo, Velasco Leandro G, Angelieri Fernanda
Department of Orthodontics, Dental School, São Paulo Methodist University, São Bernardo do Campo, São Paulo, Brazil.
Photomed Laser Surg. 2011 Mar;29(3):191-6. doi: 10.1089/pho.2009.2652. Epub 2011 Jan 23.
This study evaluated the effect of low-level laser irradiation on the speed of orthodontic tooth movement of canines submitted to initial retraction.
Twenty-six canines were retracted by using NiTi spring (force of 150 g/side). Thirteen of those were irradiated with diode laser (780 nm, 20 mW, 10 sec, 5 J/cm(2)) for 3 days, and the other 13 were not irradiated and thus were considered the control group. Patients were followed up for 4 months, and nine laser applications were performed (three each month). The movement of the canines was evaluated through 3D casts, and the statistical analysis was performed with ANOVA and Tukey tests (p < 0.05). Periapical radiographs of the studied teeth were submitted to Levander, Malmgreen, and alveolar bone ridge analyses to evaluate tissue integrity and were compared with the Wilcoxon test (p < 0.05).
A statistically significant increase in the movement speed of irradiated canines was observed in comparison with nonirradiated canines in all evaluation periods. No statistically significant difference was observed in bone and root resorption of canines, whether irradiated or not.
The diode laser used within the protocol guidelines increased the speed of tooth movement. This might reduce orthodontic treatment time.
本研究评估了低强度激光照射对接受初始内收的犬正畸牙齿移动速度的影响。
使用镍钛弹簧（每侧150克力）内收26颗犬牙。其中13颗用二极管激光（780纳米，20毫瓦，10秒，5焦耳/平方厘米）照射3天，另外13颗未照射，作为对照组。对患者随访4个月，进行9次激光照射（每月3次）。通过三维模型评估犬牙的移动情况，采用方差分析和Tukey检验进行统计分析（p<0.05）。对研究牙齿的根尖片进行Levander、Malmgreen和牙槽嵴分析，以评估组织完整性，并采用Wilcoxon检验进行比较（p<0.05）。
在所有评估期内，与未照射的犬牙相比，照射犬牙的移动速度有统计学意义的显著增加。无论是否照射，犬牙的骨吸收和牙根吸收均未观察到统计学意义上的显著差异。
按照方案指南使用二极管激光可提高牙齿移动速度。这可能会缩短正畸治疗时间。
