１９９０年始，笔者利用单轨式局部唇弓，对２４名６～１４岁儿童替牙期上颌恒切牙间隙过大（２～１２ｍｍ）进行矫治，效果满意。１临床资料１．１制作方法预制两段９～１２号针管，长度略短于中切牙牙冠近远中，将长度适中的０．５ｍｍ不锈钢丝穿于圆管中，弓丝两端弯成... Beginning of 1990, the author used the monorail type partial lip bow to treat 24 children aged 6 to 14 years with maxillary maxillary incisor gap (2 ~ 12mm) for orthodontic treatment with satisfactory results. 1 Clinical data 1.1 Production method Prefabricated two sections of 9 to 12 needles, slightly shorter than the length of the incisor crown near and far, the length of moderate 0.5mm stainless steel wire worn in the round tube, both ends of the arch wire bent into ...