A、['上前牙磨短、磨薄，尽可能排在靠近牙槽嵴顶
B、下前牙贴在牙槽嵴唇侧，切缘超出<img src='http://que-oss.fenziquan.com/web/akimg/psource/2015101514192264163.jpg'>平面1mm
C、可换小号下前牙或减径排列
D、前牙排成水平开<img src='http://que-oss.fenziquan.com/web/akimg/psource/2015101514192264163.jpg'>关系
E、上前牙排在牙槽嵴顶舌侧、下前牙排在牙槽嵴顶唇侧