Department of Orthodontics, Faculty of Dentistry, Yeditepe University, Bagdat Cad. No 238, Göztepe, Istanbul, Turkey.
Lasers Med Sci. 2012 Nov;27(6):1151-5. doi: 10.1007/s10103-011-1018-7. Epub 2011 Nov 11.
Laser use is effective in the debonding of ceramic brackets. However, a standardization of the laser debonding techniques used has not yet been implemented. The purpose of this study was to evaluate the effect of the time lag elapsed between lasing and shearing on debonding of ceramic brackets. One hundred polycrystalline ceramic brackets were placed on human premolar teeth, which were randomly divided into five groups of 20. One group was assigned as the control. The Er-YAG laser was applied on each bracket in four experimental groups at 5 W for 6 s with the scanning method. Debonding was performed 1 s, 18 s, 30 s, or 60 s after laser exposure. Shear bond strengths and adhesive remnant index scores were measured. Statistically significant difference was observed between the control and experimental groups when the data for the shear bond strengths was considered (p < 0.05). Adhesive remnant index scores of the groups were not statistically different (p > 0.05). Debonding ceramic brackets after 18 s when lased 6 s using an Er-YAG laser with the scanning method is safe and also suitable for clinical use since three brackets can be debonded at a time in succession.
激光在陶瓷托槽的去粘接中是有效的。然而，激光去粘接技术的标准化尚未实施。本研究的目的是评估激光照射和剪切之间的时间延迟对陶瓷托槽去粘接的影响。将 100 个多晶陶瓷托槽放置在人前磨牙上，随机分为 5 组，每组 20 个。一组作为对照组。在四个实验组中，使用扫描法将 Er-YAG 激光应用于每个托槽，功率为 5W，时间为 6s。激光照射后 1s、18s、30s 或 60s 进行去粘接。测量了剪切粘结强度和残留粘结指数得分。当考虑剪切粘结强度数据时，对照组和实验组之间存在显著差异（p<0.05）。各组的残留粘结指数得分无统计学差异（p>0.05）。使用扫描法的 Er-YAG 激光照射 6s 后 18s 进行陶瓷托槽去粘接是安全的，也适合临床使用，因为一次可以连续去粘接三个托槽。
