Department of Orthodontics, College of Stomatology, Guangxi Medical University, 530021 Nanning, Guangxi, China.
College of Stomatology, Guangxi Medical University, 530021 Nanning, Guangxi, China.
J Clin Pediatr Dent. 2023 Nov;47(6):178-184. doi: 10.22514/jocpd.2023.092. Epub 2023 Nov 3.
Low-angle skeletal class II malocclusions are often observed with sagittal and vertical developmental abnormalities of the mandible. Two-phase orthodontic treatment of functional orthopedic therapy combined with fixed correction is one of the most common methods to treat of skeletal class II malocclusions. This case report describes the two-phase orthodontic treatment of a patient with severe low-angle skeletal class II malocclusion. A Twin Block orthodontic appliance was used to improve mandibular growth, and the adjustment of the occlusal relationship using a fixed appliance after functional therapy. After treatment, a significant improvement was observed in the patient's facial appearance and occlusal relationship. Additionally, a 7-year follow-up confirmed the stability of the treatment results. Although a vertical facial growth direction is difficult to control, the Twin Block orthodontic appliance in adolescents might effectively improve the difference in the sagittal growth of the mandible. Whilst the growth pattern could not be fully controlled, the treatment significantly improved the patient's facial profile and occlusion.
低角骨性Ⅱ类错牙合常伴有下颌矢状和垂直发育异常。双期正畸治疗，即功能矫形治疗联合固定矫正，是治疗骨性Ⅱ类错牙合最常用的方法之一。本病例报告描述了一位严重低角骨性Ⅱ类错牙合患者的双期正畸治疗。使用 Twin Block 矫治器来促进下颌生长，功能治疗后使用固定矫治器调整咬合关系。治疗后，患者的面部外观和咬合关系有了显著改善。此外，7 年的随访证实了治疗结果的稳定性。尽管垂直面型的生长方向难以控制，但青少年时期使用 Twin Block 矫治器可能会有效改善下颌矢状向生长的差异。虽然生长模式不能完全控制，但治疗显著改善了患者的面型和咬合。
