Angle Orthod. 2023 Sep 1;93(5):603-614. doi: 10.2319/110222-748.1.
This case report describes the orthodontic treatment of an 11-year-old patient with three maxillary impacted teeth on the right side. Cone-beam computed tomography showed that these teeth were close together, with the lateral incisor in a lower position, followed by the central incisor, and the canine in a more apical position. Treatment included applying traction to these teeth. A transpalatal arch was used as an anchorage device, and surgical exposure of the lateral incisor was performed for traction with an elastic chain toward the hook welded to the 0.017 × 0.025-inch steel segmented arch. Subsequently, the central incisor was surgically exposed, elastic chains were used, along with a 0.016-inch steel arch with a box loop for correcting the tooth position. The canine spontaneously began to erupt, and a 0.017 × 0.025-inch TMA segmented arch with boot loop was used to control rotation and torque of the canine during its distalization. Once these three teeth were in the arch, treatment was finished in the usual manner. For esthetic improvement, gingivoplasty was performed in the maxillary arch. Eighteen-month follow-up showed that orthodontic treatment allowed preservation of the natural teeth, the contour of gingival support, and avoidance of prosthetic rehabilitation, reestablishing the patient's esthetics and function, with satisfactory stability.
本病例报告介绍了一名 11 岁患者的正畸治疗过程,该患者右侧上颌有三颗埋伏牙。锥形束 CT 显示这些牙齿紧密相邻,侧切牙位置较低,其次是中切牙,犬牙位置更靠根尖。治疗包括对这些牙齿进行牵引。使用腭弓作为锚固装置,对侧切牙进行外科暴露,用弹性链将其牵引至焊接在 0.017×0.025 英寸不锈钢方丝弓上的挂钩。随后,对中切牙进行外科暴露,使用弹性链和带有盒形曲的 0.016 英寸不锈钢弓来矫正牙齿位置。犬牙自发开始萌出,使用 0.017×0.025 英寸 TMA 带靴形曲的方丝弓来控制犬牙远中移动过程中的旋转和转矩。当这三颗牙齿进入弓丝后,采用常规方法完成治疗。为了改善美观,对上颌弓进行了牙龈成形术。18 个月的随访显示,正畸治疗保留了天然牙、牙龈支持的轮廓,并避免了修复治疗,恢复了患者的美观和功能,具有满意的稳定性。