Results the palatal implant connecting with the first permanent molar significantly reduced mesial movement and protrusive displacements of anchor teeth while the implant connecting with the maxillary second bicuspid was in favor of the control on the movement of the first permanent molar towards the medium of the palate 结果种植体连接在第一恒磨牙上更有利于控制支抗牙近中移动和垂直仲长；连接在第二双尖牙上对第一恒磨牙的居向移动控制更好。
