Department of Orthodontics, National Taiwan University Hospital, and Beauty Forever Dental Clinic, Taipei, Taiwan.
Beauty Forever Dental Clinic, Taipei, Taiwan.
Am J Orthod Dentofacial Orthop. 2022 Oct;162(4):554-567. doi: 10.1016/j.ajodo.2021.02.029. Epub 2022 Jun 23.
A patient with dental protrusion and deficient soft-tissue chin, previously treated with maxillary first premolar extraction, sought retreatment to improve his facial profile. Orthognathic surgery was proposed as the ideal treatment option, but the patient declined. Therefore, other orthodontic options were considered. The combined intrusion and retraction force systems supported with skeletal anchorage on both arches and a midpalatal miniscrew successfully reduced the protrusion and rotated the mandible counterclockwise to improve the facial profile and chin projection. Sagittal correction enhanced by active vertical control with skeletal anchorage and de-wedging with posterior extraction was illustrated. In addition, advancement genioplasty was performed after orthodontic treatment to improve the chin projection further. The mechanics and results of this retreatment case were discussed.
一位前牙突和软组织颏部不足的患者，曾接受上颌第一前磨牙拔除，现寻求治疗以改善面型。正颌手术被认为是理想的治疗选择，但患者拒绝了。因此，考虑了其他正畸治疗方案。使用上下颌骨支抗骨钉，联合前牙内收和磨牙后移的矫治力系统，成功地减少了前突，并逆时针旋转下颌以改善面型和颏部突度。通过上下颌骨支抗的主动垂直控制和后牙拔牙去代偿，实现了矢状向的矫正。此外，在正畸治疗后进行颏成形术进一步改善颏部突度。讨论了该病例的矫治力学和结果。
