Department of Orthodontics and Dentofacial Orthopedics, Faculty of Medicine, University of Bern, Bern, Switzerland.
Am J Orthod Dentofacial Orthop. 2013 Jun;143(6):767-72. doi: 10.1016/j.ajodo.2013.01.018.
The purpose of this study was to examine the overall success of miniscrews inserted in the paramedian palatal region for support of various appliances during orthodontic treatment.
The patients received 1 or 2 miniscrews in the paramedian anterior palate of 8.0-mm length and 1.6-mm diameter placed during orthodontic treatment by the same experienced orthodontist.
In total, 196 patients (121 girls, 75 boys; median age, 11.7; interquartile range, 3.7) who received 384 miniscrews were evaluated. Two hundred four miniscrews were used with rapid palatal expansion appliances, 136 with appliances for distalization of posterior teeth, and 44 with other appliances, such as transpalatal arches for tooth stabilization. The overall survival of the miniscrews was excellent (97.9%) in the cases examined. Cox regression analysis showed no difference in the overall survival rates of miniscrews loaded with different appliances for sex (hazard ratio, 0.95; 95% confidence interval, 0.71-1.27; P = 0.73) after adjusting for appliance and age.
This study shows that miniscrews placed in the paramedian anterior palate for supporting various orthodontic appliances have excellent survival.
本研究旨在检查在正畸治疗中，将微型种植体植入正中腭区域以支持各种矫治器的总体成功率。
患者由同一位经验丰富的正畸医生在正畸治疗中于 8.0mm 长、1.6mm 直径的正中前腭部植入 1 或 2 颗微型种植体。
共评估了 196 名患者（121 名女孩，75 名男孩；中位年龄 11.7；四分位间距 3.7），共植入 384 颗微型种植体。204 颗微型种植体用于快速腭扩展矫治器，136 颗用于远移后牙的矫治器，44 颗用于其他矫治器，如用于稳定牙齿的跨腭弓。在检查的病例中，微型种植体的总体存活率非常高（97.9%）。Cox 回归分析显示，在调整了矫治器和年龄因素后，不同类型的矫治器加载微型种植体的总体存活率无性别差异（风险比，0.95；95%置信区间，0.71-1.27；P = 0.73）。
本研究表明，植入正中前腭以支持各种正畸矫治器的微型种植体具有优异的存活率。
