Choi Jin-Young, Jin Bai, Kim Seong-Hun
Department of Orthodontics, Graduate School, Kyung Hee University, Seoul, Korea.
Korean J Orthod. 2022 Aug 2;52(5):372-382. doi: 10.4041/kjod22.158.
Anterior open bite and transverse discrepancy are often accompanied by hyperdivergent skeletal patterns. In addition, degenerative joint disorders and vertical maxillary excess contribute to an unfavorable convex facial profile with a retruded chin. Correction of this complex three-dimensional problem with orthodontic treatment alone is considered challenging owing to anatomical limitations. Moreover, a history of orthodontic treatment with premolar extraction makes retreatment difficult. This case report illustrates the application of a maxillary tissue bone-borne expander and biocreative reverse curve system in a 23-year-old female patient with a severe anterior open bite and transverse discrepancy who underwent orthodontic treatment with four premolar extractions. By setting the treatment target under precise diagnosis and using appropriate appliances, a satisfactory treatment result could be achieved without orthognathic surgery.
前牙开颌和横向差异常伴有高角骨骼型。此外，退行性关节疾病和上颌垂直过度导致面部轮廓呈不利的凸面型且颏部后缩。由于解剖学限制，仅用正畸治疗来矫正这一复杂的三维问题具有挑战性。此外，曾拔除前磨牙进行正畸治疗的病史会使再次治疗变得困难。本病例报告阐述了上颌骨支抗扩弓器和生物可吸收反曲线系统在一名23岁女性患者中的应用，该患者有严重的前牙开颌和横向差异，曾拔除四颗前磨牙进行正畸治疗。通过在精确诊断的基础上设定治疗目标并使用合适的矫治器，无需正颌手术即可获得满意的治疗效果。
