Postgraduate student, Department of Orthodontics and Dentofacial Orthopedics, Government Dental College and Hospital, Nagpur, Maharashtra, India.
Assistant professor and head, Department of Orthodontics and Dentofacial Orthopedics, Government Dental College and Hospital, Nagpur, Maharashtra, India.
Am J Orthod Dentofacial Orthop. 2012 Mar;141(3):289-297. doi: 10.1016/j.ajodo.2011.09.009.
The long duration of orthodontic treatment is a major concern for patients. A noninvasive method of accelerating tooth movement in a physiologic manner is needed. The aim of this study was to evaluate of the efficacy of low-intensity laser therapy in reducing orthodontic treatment duration and pain.
Twenty patients requiring extraction of first premolars were selected for this study. We used a randomly assigned incomplete block split-mouth design. Individual canine retraction by a nickel-titanium closed-coil spring was studied. The experimental side received infrared radiation from a semiconductor (aluminium gallium arsenide) diode laser with a wavelength of 810 nm. The laser regimen was applied on days 0, 3, 7, and 14 in the first month, and thereafter on every 15th day until complete canine retraction was achieved on the experimental side. Tooth movement was measured on progress models. Each patient's pain response was ranked according to a visual analog scale.
An average increase of 30% in the rate of tooth movement was observed with the low-intensity laser therapy. Pain scores on the experimental sides were significantly lower compared with the control sides.
Low-intensity laser therapy is a good option to reduce treatment duration and pain.
正畸治疗的持续时间长是患者关注的主要问题。需要一种非侵入性的方法来生理性地加速牙齿移动。本研究旨在评估低强度激光疗法在缩短正畸治疗时间和减轻疼痛方面的疗效。
选择 20 名需要拔除第一前磨牙的患者进行本研究。我们采用随机分组不完全区组裂区设计。通过镍钛闭合线圈弹簧个别地将尖牙向后牵拉。实验侧接受波长为 810nm 的半导体（砷化镓铝）二极管激光的红外辐射。在第一个月的第 0、3、7 和 14 天以及此后每 15 天进行一次激光治疗，直到实验侧的尖牙完全向后移动。在进展模型上测量牙齿移动。根据视觉模拟评分法对每位患者的疼痛反应进行分级。
低强度激光治疗可使牙齿移动速度平均提高 30%。实验侧的疼痛评分明显低于对照侧。
低强度激光疗法是缩短治疗时间和减轻疼痛的一种较好选择。
