Faculty of Orthodontics, College of Medicine and Dentistry, University of Ulster, Birmingham, United Kingdom.
Am J Orthod Dentofacial Orthop. 2021 Sep;160(3):473-477. doi: 10.1016/j.ajodo.2021.04.013. Epub 2021 Jun 24.
The use of fixed retainers at the end of a course of orthodontic treatment has become standard practice. The main complication that can occur with fixed retainers is the detachment of the wire from one or more teeth. A less common complication is unwanted tooth movement. This article presents a patient with extreme tooth movement associated with a mandibular fixed retainer. Ten years after orthodontic treatment, a 26-year-old male sought treatment for post-orthodontic movement of the mandibular anterior 6 teeth. Despite the fixed retainer still being attached to all teeth, the apex of the right canine was completed avulsed labially. Severe labial recession was also present on the left lateral incisor. The canine was extracted, and the fixed retainer was removed. Significant root resorption identified on a panoramic radiograph contraindicated any further extensive orthodontic intervention. This case highlights that clinicians and patients should be aware of this rare but serious complication.
固定保持器在正畸治疗结束时的使用已成为标准做法。固定保持器可能出现的主要并发症是金属丝从一颗或多颗牙齿上脱落。不太常见的并发症是牙齿意外移动。本文介绍了一位与下颌固定保持器相关的牙齿过度移动的患者。正畸治疗十年后，一名 26 岁男性因正畸后下颌前 6 颗牙齿移动而寻求治疗。尽管固定保持器仍附着在所有牙齿上，但右侧犬齿的根尖完全从唇侧脱出。左侧侧切牙也出现严重的唇侧退缩。已拔除犬齿，且去除了固定保持器。全景片上发现明显的牙根吸收，表明不适合进一步进行广泛的正畸干预。该病例强调了临床医生和患者都应意识到这种罕见但严重的并发症。
