Almallah Mai Mohammed Erfan, Hajeer Mohammad Younis, Almahdi Wael Housam, Burhan Ahmad Sharaf, Latifeh Youssef, Madkhaneh Suha Khaled
Department of Periodontics, Faculty of Dentistry, University of Damascus, Syria.
Department of Orthodontics, Faculty of Dentistry, University of Damascus, Syria.
Dent Med Probl. 2020 Jan-Mar;57(1):45-52. doi: 10.17219/dmp/113332.
Periodontal ligament (PDL) pain, associated with the insertion of elastomeric separators, is one of the most annoying experiences at the beginning of orthodontic treatment. Low-level laser therapy (LLLT) has recently been suggested as a method of controlling this pain.
The aim of this study was to evaluate the effectiveness of LLLT on reducing the pain associated with elastomeric separation and to compare a single dose of LLLT (1 h before the insertion of elastomeric separators) vs 2 doses of LLLT (1 h before and immediately after the insertion).
This randomized controlled trial was conducted at the Department of Orthodontics, Faculty of Dentistry of University of Damascus and at the Department of Orthodontics of Adib-Allaham Center in Damascus, Syria. The sample population was comprised of 36 patients, aged between 12 and 25 years (mean age: 17 ±3.7 years), and the patients were randomly divided into 2 groups. A split-mouth design was employed. One group received 1 dose of laser therapy 1 h before the insertion of elastomeric separators, whereas the other one received 2 doses of laser therapy - 1 h before and immediately after the insertion of elastomeric separators. A GaAlAs laser with a wavelength of 830 nm and a power of 100 mW was used. The pain levels were recorded using the Visual Analog Scale (VAS) after 1, 6, 24, 48, and 96 h. Student's t-test and the repeated measures analysis of variance (ANOVA) were employed to detect significant differences.
Low-level laser therapy significantly reduced post-separation pain when the experimental side was compared to the placebo side in the single-irradiation group (p < 0.05). Low-level laser therapy significantly reduced separation pain with no statistical difference between single and double irradiation protocols (p > 0.05).
Low-level laser therapy had a positive effect on reducing the pain associated with elastomeric separation, whether it was applied as a single dose before elastomeric separation or as a double dose before and after this procedure.
与弹性分离器置入相关的牙周膜疼痛是正畸治疗开始时最恼人的经历之一。近来，低强度激光疗法（LLLT）被提议作为控制这种疼痛的一种方法。
本研究旨在评估低强度激光疗法减轻弹性分离器相关疼痛的有效性，并比较单次低强度激光疗法（弹性分离器置入前1小时）与两次低强度激光疗法（弹性分离器置入前1小时和置入后立即进行）的效果。
本随机对照试验在叙利亚大马士革大学牙科学院正畸科和大马士革阿迪卜－阿拉哈姆中心正畸科进行。样本包括36名年龄在12至25岁之间（平均年龄：17±3.7岁）的患者，这些患者被随机分为2组。采用自身对照设计。一组在弹性分离器置入前1小时接受单次激光治疗，而另一组在弹性分离器置入前1小时和置入后立即接受两次激光治疗。使用波长为830nm、功率为100mW的砷化镓铝激光。在1、6、24、48和96小时后，使用视觉模拟量表（VAS）记录疼痛程度。采用学生t检验和重复测量方差分析（ANOVA）来检测显著差异。
在单次照射组中，与安慰剂侧相比，低强度激光疗法显著减轻了分离后疼痛（p<0.05）。低强度激光疗法显著减轻了分离疼痛，单次和两次照射方案之间无统计学差异（p>0.05）。
低强度激光疗法对减轻弹性分离器相关疼痛有积极作用，无论是在弹性分离器分离前单次应用还是在此操作前后两次应用。
