关键词: 摆形矫治器, 磨牙远中移动, 垂直骨面型, 安氏Ⅱ类错

Abstract:

Objective　The aim of this studywas to investigate the effects of the pendulum appliance in treating dental ClassⅡ patients with various vertical growth patterns.Methods　The samples (n=30) were divided into three groups equally based on their FMA. Pretreatment and post-treatment cephalometric radiographs were taken to measure the changes.Results　The amount of upper molar distalization in the low-angle group was the fewest, and that in the high-angle group was the most. Upper molars had been intruded insignificantly. The amount of anchorage loss at the first premolars and overjet increased at incisorswas different in the three groups. The biggest change happened in the low-angle group, and the smallest in the high-angle group.Conclusion　 The results of this study showed that pendulum appliance could move the uppermolars distally in a short period of time. The upper molars in different groups were intruded insignificantly. Pendulum appliance could be used to move the upper molars distally in high-angle cases.

Key words: pendulum appliance, molar distalization, vertical growth patterns, Angle′s ClassⅡmalocclusion