Department of Orthodontics, Faculty of Dentistry, Baskent University, Ankara, Turkey.
Eur J Orthod. 2013 Aug;35(4):507-14. doi: 10.1093/ejo/cjs059. Epub 2012 Sep 11.
This study aimed to examine the skeletal, dental, and soft tissue effects of the implant-supported pendulum (ISP) and the zygoma anchorage system (ZAS) used for the distalization of maxillary posterior teeth. Among 30 patients showing Angle class II malocclusion, 15 patients with a mean age of 14.3±1.6 years and treated with ISP were included in the first group; 15 patients with a mean age of 14.7±2.5 years and treated with ZAS were included in the second group. The predistalization and postdistalization lateral cephalograms were analysed. Statistical evaluation was carried out using SPSS. Point A and upper incisors protruded in the ISP group, retruded in the ZAS group. Upper posterior teeth were distalized in both groups, but more in the ZAS group. Significant differences were observed between the groups for the sagittal movements of Point A, incisors, and posterior teeth. Overbite decreased in the ISP group, overjet decreased in the ZAS group, upper and lower lips retruded only in the ZAS group. Both methods provided absolute anchorage for distalization of posterior teeth, but the skeletal and soft tissue outcome and distalization obtained was greater in the ZAS group. Both methods can be used as alternatives to extraoral traction and conventional molar distalization appliances with different patient requirements.
本研究旨在探讨种植体支抗的 Pendulum（ISP）和颧骨支抗系统（ZAS）用于上颌后牙远移的骨骼、牙齿和软组织效果。在 30 名表现为安氏 II 类错牙合的患者中，15 名年龄为 14.3±1.6 岁的患者被纳入第一组，接受 ISP 治疗；15 名年龄为 14.7±2.5 岁的患者被纳入第二组，接受 ZAS 治疗。分析了预远移和远移后的侧位头颅侧位片。使用 SPSS 进行统计评估。在 ISP 组中，A 点和上颌切牙突出，在 ZAS 组中后退。两组上颌后牙均远移，但 ZAS 组远移更多。A 点、切牙和后牙的矢状运动在两组之间存在显著差异。在 ISP 组中，覆颌减少，在 ZAS 组中，覆盖减少，只有在 ZAS 组中，上、下唇后退。两种方法均为后牙远移提供了绝对支抗，但 ZAS 组获得的骨骼和软组织效果以及远移量更大。两种方法均可替代口外牵引和传统的磨牙远移装置，以满足不同患者的需求。
