骨性反是临床上较难治疗的一种错畸形,且随着生长发育逐渐加重,不仅严重影响患者颅面部生长发育,导致面部发育异常,而且影响患者的心理健康。文献[1]报道,在骨性安氏Ⅲ类错中,伴有上颌后缩者替牙期占13%,恒牙期占34%,因此,早期矫治尤为重要。以往研究[2]结果提示,前方牵引配合快速扩弓治疗骨性Ⅲ类错,可使颅面结构发生显著改变。2010年3月—2013年12月,我们采用前方牵引配 Osteoid anti-clinically difficult to treat a deformity, and with the growth and development gradually aggravated, not only seriously affect the patient’s craniofacial growth and development, leading to facial abnormalities, but also affect the patient’s mental health. Literature [1] reported that in skeletal Class III malocclusion, with maxillary retraction accounted for 13% of dentition, permanent teeth accounted for 34%, therefore, early treatment is particularly important. Previous studies [2] The results suggest that the front traction with rapid expansion of the treatment of skeletal Class Ⅲ wrong, can make a significant change in the craniofacial structure. March 2010 - December 2013, we use the front traction with