Schubert Katharina, Halbich Thomas, Jost-Brinkmann Paul-Georg, Müller-Hartwich Ralf
Department of Orthodontics, Dentofacial Orthopedics and Pedodontics, Center for Dental and Craniofacial Sciences, Charité - Universitätsmedizin Berlin, Germany.
J Orofac Orthop. 2013 Jan;74(1):6-17. doi: 10.1007/s00056-012-0122-z. Epub 2013 Jan 10.
Almost all common laboratory procedures for lingual orthodontic appliances use indirect bonding of brackets via transfer trays. Ensuring precise transfer of these bracket positions to the oral cavity is especially important, as subsequent manual adjustments are challenging in lingual orthodontics and even minor errors of bracket placement may result in considerably deviating tooth positions. The purpose of this study was to evaluate in vivo the precision of indirect bonding of lingual brackets using the "Quick Modul System" (QMS®; Halbich Lingualtechnik, Berlin, Germany).
The study included eight consecutive patients treated with lingual brackets. After placing the brackets on a setup cast, the resultant positions were digitized with an optical scanner (OraScanner®; OraMetrix, Richardson, TX, USA). Individual transfer copings (QMS®) were used to transfer the brackets to the mouth, followed by intraoral scanning and virtual superimposition to analyze how much the intraoral bracket positions deviated from the positions on the cast.
Translational deviations added up to a mean transfer error of 0.12 mm in the mesiodistal, 0.13 mm in the orovestibular, and 0.10 mm in the vertical planes. Mean deviations in rotational directions amounted to 2.20° of inclination, 3.21° of angulation, and 2.29° of rotation.
The transfer system investigated in this study is capable of transferring bracket positions with good clinical precision. No differences between the bracket types and both modifications of the transfer copings were noted.
几乎所有用于舌侧正畸矫治器的常规实验室操作都是通过转移托盘间接粘结托槽。确保这些托槽位置精确转移至口腔尤为重要，因为在舌侧正畸中后续的手动调整具有挑战性，即使托槽放置的微小误差也可能导致牙齿位置出现显著偏差。本研究的目的是在体内评估使用“快速模块系统”（QMS®；德国柏林Halbich Lingualtechnik公司）间接粘结舌侧托槽的精度。
该研究纳入了连续8例接受舌侧托槽治疗的患者。将托槽放置在模型上后，使用光学扫描仪（美国得克萨斯州理查森市OraMetrix公司的OraScanner®）对所得位置进行数字化处理。使用个体转移帽（QMS®）将托槽转移至口腔，随后进行口内扫描和虚拟叠加，以分析口内托槽位置与模型上位置的偏差程度。
在近远中平面、口前庭平面和垂直平面上，平移偏差累计平均转移误差分别为0.12mm、0.13mm和0.10mm。旋转方向的平均偏差为倾斜2.20°、成角3.21°和旋转2.
