Orthodontist, private office, Green Dental Clinic, Yokohama, Kanagawa, Japan; Department of Orthodontics, Nihon University School of Dentistry at Matsudo, Matsudo, Japan.
Orthodontist, private office, Ginza Orthodontics Clinic, Chuo-ku, Tokyo, Japan.
J World Fed Orthod. 2022 Jun;11(3):69-74. doi: 10.1016/j.ejwf.2022.03.002. Epub 2022 May 17.
Recent studies have reported that the placement of miniscrews for orthodontic anchorage in maxillary tuberosity is anatomically safe and can aid in achieving efficient tooth movement mechanically. However, the success rate of miniscrews placed on the palatal aspect of the maxillary tuberosity has not yet been elucidated. This study aimed to evaluate the success rate of single- and dual-thread miniscrews inserted in the palatal aspect of the maxillary tuberosity.
A total of 101 miniscrews (17 single-thread miniscrews: diameter 2.0 mm, length 10 mm; 84 dual-thread miniscrews: diameter 2.0 mm, length 12 mm) placed in 61 patients (6 males, 55 females; mean age = 30.9 ± 8.66 years) were retrospectively examined. Miniscrews that could be maintained for orthodontic anchorage for more than 6 months were considered successful. The direction of placement, bone-miniscrew contact (BMSC) rate, and survival of miniscrews were measured using cone-beam computed tomography.
The overall success rate of single-thread miniscrews was 82.4% and that of dual-thread miniscrews was 94.0%. There was no significant difference in the overall clinical success rate between the two designs. Sex, mandibular plane angle, and malocclusion type did not significantly affect the success rate in both groups.
Both single- and dual-thread miniscrews placed on the palatal aspect of the maxillary tuberosity showed high success and BMSC rates. However, there were no significant differences in the overall success rate and BMSC rate between the two miniscrew designs.
最近的研究报告称，在上颌结节内放置微型种植体作为正畸支抗在解剖学上是安全的，并有助于机械实现有效的牙齿移动。然而，在上颌结节腭侧放置微型种植体的成功率尚未阐明。本研究旨在评估在上颌结节腭侧插入单螺纹和双螺纹微型种植体的成功率。
回顾性检查了 61 名患者（6 名男性，55 名女性；平均年龄=30.9±8.66 岁）中放置的 101 颗微型种植体（17 颗单螺纹微型种植体：直径 2.0mm，长度 10mm；84 颗双螺纹微型种植体：直径 2.0mm，长度 12mm）。将能够维持 6 个月以上正畸支抗的微型种植体视为成功。使用锥形束计算机断层扫描测量微型种植体的放置方向、骨-微型种植体接触（BMSC）率和生存情况。
单螺纹微型种植体的总体成功率为 82.4%，双螺纹微型种植体的总体成功率为 94.0%。两种设计的总体临床成功率无显著差异。性别、下颌平面角和错颌类型在两组中均未显著影响成功率。
在上颌结节腭侧放置的单螺纹和双螺纹微型种植体均显示出较高的成功率和 BMSC 率。然而，两种微型种植体设计的总体成功率和 BMSC 率无显著差异。
