Cao Yang, Liu Chufeng, Wang Chunxian, Yang Xiaoyu, Duan Peijia, Xu Chenrong
Associate Professor, Department of Orthodontics, Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University, Guangzhou, China.
J Prosthodont. 2013 Dec;22(8):597-602. doi: 10.1111/jopr.12057. Epub 2013 May 31.
Various methods of using skeletal anchorage for the intrusion of overerupted maxillary molars have been reported; however, it is difficult to intrude the overerupted upper second molars because of the low bone density in the region of the tuberosity. This article illustrates a new treatment method using partial fixed edgewise appliances and miniscrews to intrude the overerupted upper second molars. The miniscrews were applied to reinforce the anchorage of the upper first molar. The intrusive force was generated by the Ni-Ti wire. The clinical results showed a significant intrusion effect without root resorption or periodontal problems. This report demonstrates that the combination of partial conventional fixed appliances with miniscrews is a simple and effective treatment option to intrude overerupted upper second molars, especially in situations where miniscrews cannot be inserted directly next to the second molar.
已有多种利用骨锚固来压低上颌过度萌出磨牙的方法被报道；然而，由于结节区骨密度较低，压低上颌第二磨牙比较困难。本文阐述了一种使用部分固定方丝弓矫治器和微螺钉来压低上颌过度萌出第二磨牙的新治疗方法。微螺钉用于增强上颌第一磨牙的支抗。压低力由镍钛丝产生。临床结果显示有显著的压低效果，且无牙根吸收或牙周问题。本报告表明，部分传统固定矫治器与微螺钉相结合是压低上颌过度萌出第二磨牙的一种简单有效的治疗选择，尤其是在无法直接在第二磨牙旁植入微螺钉的情况下。
