A 尽可能减小覆盖 B
前磨牙的排列兼顾美观 C
尽量排列在牙槽嵴上 D
与对<img border="0" alt="" src="https://img.weimei168.com/uploads/upimg/20230104/12257626_0.gif">牙排成尖窝相对的咬合关系 E
上下颌双侧后牙缺失,<img border="0" alt="" src="https://img.weimei168.com/uploads/upimg/20230104/12257626_0_1.gif">平面平分颌间距离