Lei Yong-hua, Jian Xin-chun, Lu Yan-qin
Department of Stomatology, Xiangya Hospital, Central South University, Changsha, China.
Zhong Nan Da Xue Xue Bao Yi Xue Ban. 2006 Jun;31(3):411-3.
To evaluate the therapeutic effects of MBT straight wire on extraction case of Class II division I.
Thirty-six class II division I malocclusion patients were treated with MBT straight wire by extracting 4 bicuspid premolars or 2 maxillary bicuspid premolars. The X-ray cephalograms were analyzed before and after the treatment of MBT straight wire.
After the treatment, the overjet was reduced by 6.04 mm (P < 0.01); U1-NA was reduced by 15.43 degrees (P <0.01); and U1-NA (mm) was reduced by 4.71 mm (P <0.01). ANB was significantly reduced (P < 0.05).
MBT straight wire not only shortens the operation but also shows superior effect for Class II division I malocclusion cases.
评估MBT直丝弓矫治器对安氏Ⅱ类1分类拔牙病例的治疗效果。
36例安氏Ⅱ类1分类错颌畸形患者采用MBT直丝弓矫治器治疗，拔除4颗双尖牙或2颗上颌双尖牙。在MBT直丝弓矫治器治疗前后对X线头影测量片进行分析。
治疗后，覆盖减小6.04mm（P<0.01）；上中切牙-鼻根点角减小15.43°（P<0.01）；上中切牙-鼻根点距减小4.71mm（P<0.01）。ANB角显著减小（P<0.05）。
MBT直丝弓矫治器不仅缩短了治疗疗程，而且对安氏Ⅱ类1分类错颌畸形病例显示出较好的治疗效果。
