在正畸附件粘接过程中，为了减少酸蚀对牙体、牙周的损害，我们在临床上运用了定位酸蚀技术。通过２１例患者７个月至２４个月的临床观察，未发现一例患者在矫治期间附件周围的牙面有脱钙的白色斑点及龋坏区。提示该方法限制了酸蚀剂的酸蚀范围，易于去除附件周围多余的粘接剂，减少了对牙釉质的损害及对牙龈的刺激 In the orthodontic attachment bonding process, in order to reduce the acid damage to the teeth, periodontal, we use the clinical location of the acid etching technology. Through the clinical observation of 21 patients from 7 months to 24 months, one patient was found not to have decalcified white spots and decayed areas around the appendages during the treatment. It is suggested that this method limits the acid etching range of the acid etchant, it is easy to remove the excess adhesive around the attachment, reduces the damage to the enamel and stimulates the gums