Choi Eun-Hack Andrew, Kim Dasomi, Jing Liu, Yu Hyung-Seog, Choi Sung-Hwan, Cha Jung-Yul
Department of Orthodontics, Institute of Craniofacial Deformity, Yonsei University College of Dentistry, Seoul, Korea.
Private Practice, Seoul, Korea.
Korean J Orthod. 2025 May 25;55(3):167-175. doi: 10.4041/kjod24.166. Epub 2025 Apr 23.
To assess the success rate and proximity of miniscrews to the root using surgical guides produced by integrating data obtained from cone-beam computed tomography and intraoral scanned models.
This retrospective study involved 113 patients (224 miniscrews) who underwent miniscrew placement as part of their orthodontic treatment. Two operators placed miniscrews between the buccal alveolar bone of each patient and assessed initial stability by measuring the Periotest value (PTV) and insertion torque (IT). Patients were divided into two groups based on the miniscrew insertion method: manual group (MG) and surgical guide group (SG). Root proximity was assessed using periapical radiography, and miniscrews that remained in place for over 6 months were considered successful.
There was a statistically significant difference in the Kaplan-Meier survival curves between the groups ( < 0.05). The success rates of the miniscrews were 79.1% and 90.5% for the MG and SG, respectively ( < 0.05). The root contact rate also differed significantly between the groups (MG, 17.5%; SG, 0.1%; < 0.001). However, the PTV and IT did not show significant differences between the groups.
Proximity to the root and utilization of surgical guides have the most direct impact on the success rate of miniscrews. Root proximity can be effectively reduced using surgical guides. Therefore, the use of a miniscrew surgical guide is recommended to increase the success rate of miniscrews as stable anchorage devices, particularly in cases with narrow interradicular space.
利用整合锥形束计算机断层扫描和口内扫描模型所获数据制作的外科导板，评估微型螺钉的成功率以及微型螺钉与牙根的接近程度。
这项回顾性研究纳入了113例患者（224颗微型螺钉），这些患者在正畸治疗中接受了微型螺钉植入。两名操作人员在每位患者的颊侧牙槽骨之间植入微型螺钉，并通过测量牙周膜功能测试值（PTV）和植入扭矩（IT）评估初始稳定性。根据微型螺钉植入方法将患者分为两组：手动组（MG）和外科导板组（SG）。使用根尖片评估牙根接近程度，微型螺钉在位超过6个月被视为成功。
两组之间的Kaplan-Meier生存曲线存在统计学显著差异（<0.05）。MG组和SG组微型螺钉的成功率分别为79.1%和90.5%（<0.05）。两组之间的牙根接触率也存在显著差异（MG组为17.5%；SG组为0.1%；<0.001）。然而，两组之间的PTV和IT没有显示出显著差异。
与牙根的接近程度和外科导板的使用对微型螺钉的成功率有最直接的影响。使用外科导板可有效降低与牙根的接近程度。因此，建议使用微型螺钉外科导板以提高微型螺钉作为稳定支抗装置的成功率，尤其是在根间间隙狭窄的病例中。
