男,56岁。缺失,松动1度,无牙体疾患,无倾斜扭转,X线显示牙槽骨水平吸收,根分歧区未破坏。健康。行双端固定桥修复,正确的处理是
A 增加<img border="0" alt="" src="https://img.weimei168.com/uploads/upimg/20230804/12260329_0_3.gif">作为基牙 B
严格按照天然牙形态制作桥体 C
降低桥体<img border="0" alt="" src="https://img.weimei168.com/uploads/upimg/20230804/12260329_0_4.gif">面,脱离咬合接触 D
适当减小桥体颊舌径 E
<img border="0" alt="" src="https://img.weimei168.com/uploads/upimg/20230804/12260329_0_5.gif">杀髓,行根管治疗后设计桩核冠固位体