片式托槽定位器的制作杨美祥丁寅（第四军医大学口腔医学院正畸科）在正畸临床使用固定矫治器时，托槽和带环等装置在牙冠上的位置至关重要。目前使用的托槽定位器其指针与牙面呈点式接触，定点时不稳定，使近远中高度会产生偏差，影响矫治器的精确定位。而且其制作复杂，... Fabrication of a wafer-type bracket locator Yang Mei-Xiang Ding Wei (Orthodontic Department of the Fourth Military Medical University School of Stomatology) When using orthodontic appliances with fixed appliances, the position of the brackets and ring devices on the crown is crucial. At present, the position of the bracket locator has a point-type contact with the tooth surface, and is unstable at the fixed point, so that the near-middle height may cause a deviation and affect the precise positioning of the appliance. And its production is complicated,...