Department of Dental, Beijing Zhongguancun Hospital, 100080 Beijing, China.
Department of Orthodontics, Peking University Stomatological Hospital, 100081 Beijing, China.
J Clin Pediatr Dent. 2023 Nov;47(6):11-20. doi: 10.22514/jocpd.2023.077. Epub 2023 Nov 3.
Skeletal Class II malocclusion is a common malocclusion seen in clinics. It is characterized by maxillary protrusion and mandibular retrognathia and has a high incidence in adolescent mixed dentition and early permanent dentition. The early functional correction has achieved some clinical results in treating skeletal Class II malocclusion with mandibular hypoplasia. During treatment, the timing of correction is the key factor in determining the therapeutic effect, although it is difficult to understand. This review focuses on the timing of early correction of mandibular hypoplasia in combination with relevant assessment indicators and historical literature from four perspectives-the law of mandibular growth and development, the necessity of early treatment, the timing of early treatment, and the determination of the peak period of mandibular growth and development-to provide a theoretical reference for the timing of the treatment of clinical skeletal Class II malocclusion. This review shows that skeletal Class II mandibular growth has different characteristics in males and females. Bone growth assessment before treatment helps diagnose mandibular developmental morphology and the timing of early correction in adolescents with skeletal Class II malocclusion and hypoplasia of the mandible.
骨性Ⅱ类错颌是临床常见的错颌畸形，其特征为上颌前突和下颌后缩，在青少年混合牙列期和恒牙早期的发病率较高。早期的功能矫正已经在治疗下颌发育不足的骨性Ⅱ类错颌中取得了一些临床效果。在治疗过程中，矫正时机是决定治疗效果的关键因素，尽管这很难理解。本综述从下颌生长发育规律、早期治疗的必要性、早期治疗时机以及下颌生长发育高峰期的确定四个方面，结合相关评估指标和历史文献，聚焦于下颌发育不足的早期矫正时机，为临床骨性Ⅱ类错颌的治疗时机提供理论参考。本综述表明，男性和女性的骨性Ⅱ类下颌生长具有不同的特征。治疗前的骨骼生长评估有助于诊断青少年骨性Ⅱ类错颌伴下颌发育不良的下颌发育形态和早期矫正时机。
