Department of Orthodontics, Faculty of Dentistry, Tabriz University of Medical Sciences, Golgasht Avenue, Tabriz, Iran.
Prog Orthod. 2021 Jan 7;22(1):2. doi: 10.1186/s40510-020-00347-z.
The aim of this study was to investigate the effect of surface roughening and acid etching on clinical success rate and removal and insertion torque of orthodontic miniscrews.
Sixty-two orthodontic miniscrews (Jail Medical Corporation, Seoul, Korea) with the same design and dimensions (10-mm length, 2-mm diameter) are divided into two (sandblasted and acid-etched versus control) groups. The sample of the study was 31 patients whose miniscrews were needed for en masse retraction of the upper six anterior teeth. In this split-mouth study, the miniscrews were placed in the attached gingiva between the second premolar and the first molar. The side (left or right) was selected randomly. The miniscrews were loaded 6 weeks after insertion, and the patients were followed up after 3, 6, 10, 14, and 18 weeks and then for 4 weeks interval. Chi-square, correlation, and independent t tests were done using SPSS ver24 to interpret the data.
The survival rate was 90.3% and 83.9% for the sandblasted and acid-etched versus the control group, respectively. The difference in survival rate was not statistically significant (p > 0.05). Removal torque was higher for the sandblasted group (p < 0.05). Younger patients showed less survival rate (p < 0.05) in both groups. Insertion side, namely, left or right, was not statistically significant.
Although sandblasting increased removal torque, it did not influence the survival rate of orthodontic miniscrews significantly.
本研究旨在探讨表面粗化和酸蚀对正畸微螺钉临床成功率和移除及插入扭矩的影响。
62 颗正畸微螺钉（韩国首尔 Jail Medical 公司）具有相同的设计和尺寸（10mm 长，2mm 直径），分为两组（喷砂酸蚀组与对照组）。研究样本为 31 名患者，他们的微螺钉需要用于上颌六前牙整体后移。在这项分侧研究中，微螺钉被放置在上颌第二前磨牙和第一磨牙之间的附着龈内。侧别（左侧或右侧）随机选择。微螺钉在插入后 6 周加载，患者在 3、6、10、14 和 18 周后以及随后的 4 周间隔进行随访。使用 SPSS ver24 进行卡方检验、相关性检验和独立 t 检验来解释数据。
喷砂酸蚀组和对照组的存活率分别为 90.3%和 83.9%。存活率差异无统计学意义（p>0.05）。喷砂组的移除扭矩较高（p<0.05）。两组中年轻患者的存活率较低（p<0.05）。插入侧，即左侧或右侧，无统计学意义。
尽管喷砂增加了移除扭矩，但对正畸微螺钉的存活率没有显著影响。
