A 冠的<img border="0" alt="" src="https://img.weimei168.com/uploads/upimg/20230104/2860062_0_1.jpg">边缘终止于耠缘崤下方 B
冠的<img border="0" alt="" src="https://img.weimei168.com/uploads/upimg/20230104/2860062_0_2.jpg">边缘一定要覆盖颊尖以保护牙尖 C
<img border="0" alt="" src="https://img.weimei168.com/uploads/upimg/20230104/2860062_0_3.jpg">面应至少预备大于1.0mm的间隙 D
沿中央沟预备成宽深各1mm的<img border="0" alt="" src="https://img.weimei168.com/uploads/upimg/20230104/2860062_0_4.jpg">面沟 E
邻轴沟位于邻面舌侧1/3与中1/3交界处