Moro Alexandre, Janson Guilherme, de Freitas Marcos Roberto, Henriques José Fernando Castanha, Petrelli Nicolau Eros, Lauris José Pereira
Department of Orthodontics, Federal University of Parana, Brazil.
Angle Orthod. 2009 Mar;79(2):221-9. doi: 10.2319/121807-591.1.
To identify the skeletal, dentoalveolar, and soft tissue changes that occur during Class II correction with the Cantilever Bite Jumper (CBJ).
This prospective cephalometric study was conducted on 26 subjects with Class II division 1 malocclusion treated with the CBJ appliance. A comparison was made with 26 untreated subjects with Class II malocclusion. Lateral head films from before and after CBJ therapy were analyzed through conventional cephalometric and Johnston analyses.
Class II correction was accomplished by means of 2.9 mm apical base change, 1.5 mm distal movement of the maxillary molars, and 1.1 mm mesial movement of the mandibular molars. The CBJ exhibited good control of the vertical dimension. The main side effect of the CBJ is that the vertical force vectors of the telescope act as lever arms and can produce mesial tipping of the mandibular molars.
The Cantilever Bite Jumper corrects Class II malocclusions with similar percentages of skeletal and dentoalveolar effects.
确定使用悬臂式咬合跳跃器（CBJ）矫治安氏II类错牙合期间发生的骨骼、牙槽骨和软组织变化。
对26例使用CBJ矫治器治疗的安氏II类1分类错牙合患者进行了这项前瞻性头影测量研究。将其与26例未经治疗的安氏II类错牙合患者进行比较。通过传统头影测量和约翰斯顿分析法分析了CBJ治疗前后的头颅侧位片。
通过2.9mm的根尖基骨变化、上颌磨牙1.5mm的远中移动和下颌磨牙1.1mm的近中移动完成了安氏II类错牙合的矫治。CBJ对垂直方向具有良好的控制作用。CBJ的主要副作用是套筒冠的垂直力向量起到杠杆臂的作用，可导致下颌磨牙近中倾斜。
悬臂式咬合跳跃器矫治安氏II类错牙合时，骨骼和牙槽骨效应的比例相似。
