Department of Orthodontics, Graduate School of Dentistry, Kyung Hee University, Seoul 02447, Korea.
Department of Oral and Maxillofacial Radiology, Graduate School of Dentistry, Kyung Hee University, Seoul 02447, Korea.
Sensors (Basel). 2021 Sep 2;21(17):5911. doi: 10.3390/s21175911.
Accurate bracket placement is essential for successful orthodontic treatment. An indirect bracket bonding system (IDBS) has been developed to ensure proper bracket positioning with three-dimensional computer-aided transfer jigs. The purpose of this study was to investigate the accuracy of bracket positioning by a one-body transfer jig according to the tooth type and presence/absence of a resin base. In total, 506 teeth from 20 orthodontic patients were included in this study. After initial dental models were scanned, virtual setup and bracket positioning procedures were performed with 3D software. Transfer jigs and RP models were fabricated with a 3D printer, and brackets were bonded to the RP model with or without resin base fabrication. The best-fit method of 3D digital superimposition was used to evaluate the lineal and angular accuracy of the actual bracket position compared to a virtual bracket position. Although all the measurements showed significant differences in position, they were clinically acceptable. Regarding the tooth types, premolars and molars showed higher accuracy than anterior teeth. The presence or absence of a resin base did not consistently affect the accuracy. In conclusion, the proper application of IDBS should be performed considering the errors, and resin base fabrication might not be essential in ensuring high-accuracy IDBS.
准确的托槽定位对于成功的正畸治疗至关重要。为了确保托槽的正确定位，开发了一种间接托槽粘接系统（IDBS），该系统使用三维计算机辅助转移夹具。本研究的目的是根据牙型和树脂基的存在/缺失，研究一体转移夹具对托槽定位的准确性。本研究共纳入 20 名正畸患者的 506 颗牙齿。初始牙模扫描后，使用 3D 软件进行虚拟设置和托槽定位程序。使用 3D 打印机制作转移夹具和 RP 模型，并在 RP 模型上制作带或不带树脂基的托槽。使用 3D 数字叠加的最佳拟合方法，评估实际托槽位置与虚拟托槽位置的线性和角度精度。尽管所有测量值的位置都存在显著差异，但均在临床可接受范围内。关于牙型，前磨牙和磨牙的准确性高于前牙。树脂基的存在与否并不一致地影响准确性。总之，应考虑误差正确应用 IDBS，并且在确保高精度 IDBS 时，树脂基的制作可能不是必需的。
