Department of Orthodontics and Dentofacial Orthopedics, University of Bern, Switzerland.
Am J Orthod Dentofacial Orthop. 2012 Sep;142(3):406-9. doi: 10.1016/j.ajodo.2012.01.019.
Bonding a flexible spiral wire retainer to the lingual surfaces of all 6 anterior mandibular teeth is a commonly used type of retention. Complications are rare but can be serious enough to produce biologic damage. This article presents a serious complication of a lingual flexible spiral wire retainer. Four years after the orthodontic treatment, a 20-year-old man sought treatment for a broken flexible spiral wire retainer. The clinical examination showed about 35° of buccal root torque of that tooth. A cone-beam computed tomography image showed that the root and the apex of the tooth were almost completely out of the bone on its buccal side. Surprisingly, the tooth's vitality was preserved. The tooth was moved back, nearly to its original position; clinically, only a gingival recession remained. Orthodontists and dentists should be aware of possible complications of bonded retainers. Patients should be clearly informed how to detect problems at an early stage.
将弹性螺旋丝固位体粘结到所有 6 个下颌前牙的舌面是一种常用的保持方式。并发症很少见，但也可能很严重，导致生物损伤。本文介绍了一种舌侧弹性螺旋丝固位体的严重并发症。正畸治疗 4 年后，一名 20 岁男性因弹性螺旋丝固位体断裂寻求治疗。临床检查显示该牙颊向有大约 35°的牙根转矩。锥形束 CT 图像显示该牙的牙根和根尖几乎完全从颊侧牙槽骨中穿出。令人惊讶的是，该牙的活力得以保留。该牙被移回，几乎回到原来的位置；临床检查仅发现牙龈退缩。正畸医生和牙医应该意识到粘结固位体可能出现的并发症。应该明确告知患者如何早期发现问题。
