正畸临床工作中,上颌单尖牙近中唇向错位患者较为多见。笔者对40名10～22岁患者的51颗上颌单尖牙近中唇向错位,采用拔除上颌第一双尖牙,活动矫治器附弓簧进行矫治。矫治器设计:双侧第一恒磨牙上放改良箭头卡;非拔牙侧第一、二双尖牙间放弯向近中卡抱第一双尖牙的间隙卡(单臂卡);拔牙侧放绕过第二双尖牙近中邻面的单臂卡;双曲唇弓从一侧单尖牙远中及第一双尖牙近中间隙跨过(牙合)面,经切牙唇面切1/3交界处到拔牙侧从第二双尖牙近中面、单臂 Orthodontic clinical work, the maxillary single canine near the lip to the wrong patients are more common. The author of 40 patients 10 to 22 years old patients with maxillary unilateral spondylolisthesis of the maxillary dislocation, the removal of the first maxillary first molar, active appliance bow spring correction. Appliance design: bilateral first molars placed on the improved arrow card; non-extraction side of the first and second pairs of canine bending between the first cardinal near the card holding the first pair of canine gap card (single card); extraction side Put around the second bicuspid near the surface of the arm card; double lip bow from the side of the canine in the distal and the first pair of canine near the gap across the (occlusal) face, the incisor lip Face cut 1/3 junction to the tooth extraction side from the second pair of canine near the middle, one arm