Kook Yoon-Ah, Bayome Mohamed, Trang Vu Thi Thu, Kim Hye-Jin, Park Jae Hyun, Kim Ki Beom, Behrents Rolf G
Professor, Department of Orthodontics, Seoul St. Mary's Hospital, Catholic University of Korea, Seoul, Korea.
Research assistant professor, Graduate School, Catholic University of Korea, Seoul, Korea; visiting professor, Department of Postgraduate Studies, Universidad Autonóma del Paraguay, Asunción, Paraguay.
Am J Orthod Dentofacial Orthop. 2014 Jul;146(1):47-54. doi: 10.1016/j.ajodo.2014.03.023.
The purpose of this study was to evaluate the treatment effects of maxillary posterior tooth distalization performed by a modified palatal anchorage plate appliance with cephalograms derived from cone-beam computed tomography.
The sample consisted of 40 lateral cephalograms obtained from the cone-beam computed tomography images of 20 Class II patients (7 men, 13 women; average age, 22.9 years) who underwent bilateral distalization of their maxillary dentition. The lateral cephalograms were derived from the cone-beam computed tomography images taken immediately before placement of a modified palatal anchorage plate appliance and at the end of distalization. Paired t tests were used for comparisons of the changes.
The distal movement of the maxillary first molar was 3.3 ± 1.8 mm, with distal tipping of 3.4° ± 5.8° and intrusion of 1.8 ± 1.4 mm. Moreover, the maxillary incisors moved 3.0 ± 2.7 mm lingually, with lingual tipping of 6.2° ± 7.6° and insignificant extrusion (1.1 mm; P = 0.06). The occlusal plane angle was increased significantly (P = 0.0001).
The maxillary first molar was distalized by 3.3 mm at the crown and 2.2 mm at root levels, with distal tipping of 3.4°. It is recommended that clinicians should consider using the modified palatal anchorage plate appliance in treatment planning for patients who require maxillary total arch distalization.
本研究的目的是通过改良腭部锚固板矫治器对上颌后牙进行远中移动，并利用锥形束计算机断层扫描（CBCT）获得的头影测量片来评估其治疗效果。
样本包括从20例II类患者（7名男性，13名女性；平均年龄22.9岁）的CBCT图像中获取的40张侧位头影测量片，这些患者均接受了双侧上颌牙列远中移动治疗。侧位头影测量片分别来自于放置改良腭部锚固板矫治器前即刻及远中移动结束时的CBCT图像。采用配对t检验对变化进行比较。
上颌第一磨牙远中移动3.3±1.8mm，远中倾斜3.4°±5.8°，压低1.8±1.4mm。此外，上颌切牙舌向移动3.0±2.7mm，舌向倾斜6.2°±7.6°，有轻微伸长（1.1mm；P=0.06）。平面角显著增加（P=0.0001）。
上颌第一磨牙牙冠远中移动3.3mm，牙根远中移动2.2mm，远中倾斜3.4°。建议临床医生在为需要上颌全牙弓远中移动的患者制定治疗计划时考虑使用改良腭部锚固板矫治器。
