Department of Orthodontics, Faculty of Dentistry, Erciyes University, 38039, Melikgazi, Kayseri, Turkey.
Oral and Maxillofacial Surgery, Genome and Stem Cell Center, Erciyes University, Kayseri, Turkey.
J Orofac Orthop. 2021 Jul;82(4):236-245. doi: 10.1007/s00056-020-00250-6. Epub 2020 Sep 29.
This study evaluated and compared the effects of low-level laser therapy (LLLT) and piezocision on the amount of orthodontic tooth movement.
Forty maxillary canines from 20 patients (mean age, 16.35 ± 1.14 years) were evaluated in a split-mouth design study. Miniscrew-supported canine distalization was performed. Piezocision was applied in the right maxillary canine region, and the left maxillary canines were irradiated with a diode laser (940 nm, 5 J/cm). LLLT was performed on day 0 and days 3, 7, 14, 21, and 28 after the start of canine distalization in the first 4‑week period. Data were evaluated at baseline (T0) and after 4 (T1), 8 (T2), and 12 (T3) weeks. The amount of canine movement was determined from three-dimensional models, and the angulation of canines and first molars was analyzed based on lateral cephalograms.
Intragroup and intergroup comparisons of canine distalization were performed for four different time intervals (T0-T1, T1-T2, T2-T3, T0-T3). The canine tooth movement in the T0-T1 period was significantly greater in the LLLT group compared to the piezocision group. No statistically significant differences were observed between the groups for the T1-T2, T2-T3, and T0-T3 periods. The amount of canine distalization in the T0-T1 period was significantly greater than that in the T1-T2 and T2-T3 periods in both groups. Tooth movement during the T1-T2 period was higher than that in the T2-T3 period in the LLLT group. Cephalometric evaluation revealed no statistically significant difference between the groups with respect to canine and first molar angulation.
Although laser application seems more effective during the first 4‑week period, considering the 12-week period, the effects of LLLT and piezocision on orthodontic tooth movement during canine distalization were similar.
本研究评估和比较了低水平激光疗法（LLLT）和超声骨刀在正畸牙移动量方面的效果。
在一项分侧设计研究中，评估了 20 名患者（平均年龄 16.35±1.14 岁）的 40 颗上颌尖牙。使用微螺钉支抗进行尖牙远移。在右侧上颌尖牙区进行超声骨刀处理，左侧上颌尖牙用二极管激光（940nm，5J/cm）照射。在第一 4 周期间，在尖牙远移开始后的第 0 天和第 3、7、14、21 和 28 天进行 LLLT。在基线（T0）和第 4 周（T1）、第 8 周（T2）和第 12 周（T3）进行数据评估。从三维模型确定尖牙移动量，并根据侧位头颅侧位片分析尖牙和第一磨牙的倾斜角度。
对四个不同时间间隔（T0-T1、T1-T2、T2-T3、T0-T3）进行了尖牙远移的组内和组间比较。在 LLLT 组中，T0-T1 期间的尖牙移动量明显大于超声骨刀组。在 T1-T2、T2-T3 和 T0-T3 期间，两组之间没有统计学上的显著差异。在 T0-T1 期间，尖牙远移量明显大于 T1-T2 和 T2-T3 期间的尖牙远移量。在 LLLT 组中，T1-T2 期间的牙齿移动量高于 T2-T3 期间。头影测量评估显示，两组之间在尖牙和第一磨牙的倾斜角度方面没有统计学上的显著差异。
尽管在最初的 4 周内激光应用似乎更有效，但考虑到 12 周的时间，LLLT 和超声骨刀在尖牙远移期间对正畸牙移动的效果相似。
