A 选磨正中<img border="0" alt="" src="https://img.weimei168.com/uploads/upimg/20230104/2860646_0.jpg">早接触时,主要选磨与早接触支持尖相对应的近远中边缘嵴和中央窝 B
选磨侧方<img border="0" alt="" src="https://img.weimei168.com/uploads/upimg/20230104/2860646_0_1.jpg">干扰时,选磨非支持尖上的<img border="0" alt="" src="https://img.weimei168.com/uploads/upimg/20230104/2860646_0_2.jpg">干扰点 C
选磨侧方<img border="0" alt="" src="https://img.weimei168.com/uploads/upimg/20230104/2860646_0_3.jpg">干扰时,如为尖牙的干扰通常以选磨上尖牙为主 D
前伸<img border="0" alt="" src="https://img.weimei168.com/uploads/upimg/20230104/2860646_0_4.jpg">不干扰时,如前牙接触而后牙不接触时,选磨以下前牙唇斜面为主 E
前伸<img border="0" alt="" src="https://img.weimei168.com/uploads/upimg/20230104/2860646_0_5.jpg">不干扰时,如后牙接触而前牙不接触时,选磨上牙尖的远中斜面或下牙尖的近中斜面