The device was mounted to the tooth-band. 2 weeks after the alveolus bone resection, the tooth-bone complex monofocal transport disc ( MTD) were performed by complete horizontal subapical and vertical interdental osteotomy, at the same time the distractor and the arch wire were fixed. 模型建立2周后,行上颌水平根尖下及垂直牙间截骨,制作第四军医大学硕士学位论文牙骨复合体单转运盘,同时固定牵张器并安装单领牙弓弓丝。