OBJECTIVES The aim of this study is to investigate the effect of photobiomodulation therapies on root resorption compared with the placebo group. MATERIALS AND METHODS Thirty patients who were admitted to the Gaziantep University Faculty of Dentistry Orthodontics Department for treatment, with an indication of upper right first premolar tooth extraction were included. Before the individuals' orthodontic treatment, 0.022 slot MBT brackets and tubes were placed on the maxillary first premolar and molar. A 150-g buccal tipping force was applied to the first premolar. Cantilever spring with 0.017 × 0.025 Beta Titanium wire was used for force application. Individuals were then randomly divided into three groups. For the first group, laser application was performed with an 810-nm GaAlAs laser device at 0, 3, 7, 14, 21, and 28 days to 8 J/cm2. For the second group, an LED application according to the manufacturer's instructions with an 850-nm wavelength and 20 mW/cm2 output power for 10 min per day during the experiment. For the third group, a placebo therapy was completed whereby a laser device that did not make active pulses was used. At the end of 4 weeks, the amount of root surface resorption was compared using micro-CT imaging after the extraction of the teeth. RESULTS No significant difference was found between the groups in terms of regional and total crater volumes. It was observed that photobiomodulation therapies were not different from the control group in terms of forming root resorption. CONCLUSIONS It is seen that laser and LED photobiomodulation therapies used for accelerate orthodontic tooth movement do not differ from the control group in terms of forming root resorption. CLINICAL RELEVANCE According to the results of this pilot study on this subject, which needs to be clarified with new findings in the future, LED and laser applications may not increase the risk for root resorption.

中文翻译：

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光生物调节疗法对与正畸力相关的牙根吸收的影响：使用微计算机断层扫描的先导研究。

目的本研究的目的是与安慰剂组相比，研究光生物调节疗法对根吸收的影响。材料与方法包括30例入院的加济安泰普大学牙科正畸学系治疗的患者，其中包括右上先磨牙前拔牙的指征。在个体进行正畸治疗之前，将0.022槽的MBT托槽和试管放置在上颌第一磨牙和磨牙上。向第一前磨牙施加150 g的颊侧倾覆力。施加力为0.017×0.025 Beta钛丝的悬臂弹簧。然后将个体随机分为三组。对于第一组，使用810-nm GaAlAs激光设备在0、3、7、14、21和28天时以8 J / cm2的速度进行激光施加。对于第二组，在实验过程中，按照制造商的说明，每天以10分钟的时间每天使用850 nm波长和20 mW / cm2输出功率的LED应用。对于第三组，完成了安慰剂疗法，从而使用了不会产生活动脉冲的激光设备。在4周结束时，在拔出牙齿后使用micro-CT成像比较牙根表面吸收的量。结果在区域和总火山口数量方面，各组之间没有发现显着差异。观察到光生物调节疗法在形成根吸收方面与对照组没有区别。结论可以看出，用于加速正畸牙齿运动的激光和LED光生物调节疗法在形成牙根吸收方面与对照组没有区别。临床相关性根据此主题的初步研究结果，将来需要用新发现加以澄清，LED和激光的应用可能不会增加牙根吸收的风险。