Therapeutic approach to Class II, Division 1 malocclusion with maxillary functional orthopedics

INTRODUCTION: Interceptive treatment of Class II, Division 1 malocclusion is a challenge orthodontists commonly face due to the different growth patterns they come across and the different treatment strategies they have available.OBJECTIVE: To report five cases of interceptive orthodontics performed with the aid of Klammt's elastic open activator (KEOA) to treat Class II, Division 1 malocclusion.METHODS: Treatment comprehends one or two phases; and the use of functional orthopedic appliances, whenever properly recommended, is able to minimize dentoskeletal discrepancies with consequent improvement in facial esthetics during the first stage of mixed dentition. The triad of diagnosis, correct appliance manufacture and patient's compliance is imperative to allow KEOA to contribute to Class II malocclusion treatment.RESULTS: Cases reported herein showed significant improvement in skeletal, dental and profile aspects, as evinced by cephalometric analysis and clinical photographs taken before, during and after interceptive orthodontics.

引言：安氏Ⅱ类1分类错𬌗畸形（Class II, Division 1 malocclusion）的阻断性正畸治疗是正畸医师临床工作中常见的挑战，这是由于患者的生长型存在个体差异，且可供选择的治疗策略也各不相同。
目的：报告5例采用克拉姆特弹性开放式肌激动器（Klammt's elastic open activator, KEOA）辅助实施阻断性正畸治疗，以矫治安氏Ⅱ类1分类错𬌗畸形的临床病例。
方法：本次治疗涵盖1至2个阶段；在替牙期（mixed dentition）早期阶段，若经规范推荐使用功能矫形矫治器（functional orthopedic appliances），可有效减轻牙颌面不调（dentoskeletal discrepancies），进而改善面部美观度。明确诊断、矫治器精准制作与患者良好依从性这三大核心要素，是保障KEOA应用于安氏Ⅱ类错𬌗畸形治疗取得预期效果的必要前提。
结果：本文报告的病例均在骨骼、牙列及侧貌外观方面获得显著改善，上述疗效可通过阻断性正畸治疗前、治疗中及治疗后的头影测量分析（cephalometric analysis）与临床照片得到证实。