减少复发是正畸治疗的一个目标,为了减少复发曾提出各种方法,如矫治后下切牙的位置要在基骨上;Ⅱ类错(牙合)、深复(牙合)的过度矫正,及拔牙区牙根超过平行位而靠拢。今天,高效的机械方法及矫正器的发展,使正晴医师能使牙的移动达到上述要求。正畸治疗中拔牙矫治甚为普遍,而邻近 Reduce the recurrence of orthodontic treatment is a goal, in order to reduce the recurrence of a variety of methods have been proposed, such as the position of the incisor on the base of the bone after correction; Class Ⅱ malocclusion, deep complex (occlusion) overcorrection, And tooth extraction area more than parallel to the roots and close. Today, the development of efficient mechanical methods and appliances enables Dr. Ching Ching to achieve the above-mentioned requirements for the movement of teeth. Tooth extraction orthodontic treatment is very common, and adjacent