J Am Dent Assoc. 2022 Sep;153(9):884-892. doi: 10.1016/j.adaj.2022.05.010. Epub 2022 Jul 19.
An orthodontic traction technique with a miniscrew-anchored cantilever spring was used for the traction of a deeply impacted maxillary third molar to substitute its adjacent second molar with severe root resorption.
A 30-year-old woman sought multidisciplinary treatment planning for a second molar with severe root resorption caused by a deeply impacted third molar. Panoramic radiographs and cone-beam computed tomographic images showed that the third molar was located on the apical and palatal side of the second molar and that the second molar had severe root resorption. The second molar was removed, and the impacted third molar was orthodontically tractioned occlusally with the aid of a miniscrew-anchored cantilever spring. After 12 months of orthodontic treatment, the maxillary left third molar was successfully tractioned occlusally and well aligned with adjacent teeth for the substitution of the second molar. The patient was satisfied with the treatment outcome.
A palatal miniscrew-anchored cantilever spring is an effective and viable technique for the orthodontic traction of deeply impacted third molars to substitute second molars with severe root resorption.
使用微型螺钉锚定的悬臂弹簧的正畸牵引技术被用于牵引深埋伏的上颌第三磨牙，以替代其相邻的第二磨牙，这些第二磨牙有严重的根吸收。
一位 30 岁的女性因深埋伏的第三磨牙导致第二磨牙严重根吸收而寻求多学科治疗计划。全景片和锥形束 CT 图像显示，第三磨牙位于第二磨牙的根尖和腭侧，第二磨牙有严重的根吸收。第二磨牙被拔除，使用微型螺钉锚定的悬臂弹簧将埋伏的第三磨牙向近中方向进行正畸牵引。经过 12 个月的正畸治疗，上颌左侧第三磨牙成功地向近中方向牵引并与邻牙排列整齐，替代了第二磨牙。患者对治疗结果满意。
腭侧微型螺钉锚定的悬臂弹簧是一种有效且可行的技术，可用于正畸牵引深埋伏的第三磨牙，以替代有严重根吸收的第二磨牙。
