在口腔科镶复工作中,经常遇到一些患者因牙齿缺失过久,没有及时镶复,而使缺牙两侧的基牙向间隙处有不同程度的倾倒,由此所造成的倒凹,给镶复工作带来了困难。过去遇到这种情况,一是较多的片切两个倾倒的基牙体,适当减少倒凹,二是拔除倾倒较多的基牙,否则就无法修复。近年来,由于医用 Dentistry inlaid rehabilitation work, often encountered in some patients due to missing teeth too long, not promptly set complex, leaving the abutments on both sides of the missing teeth to the gap at different levels of dumping, resulting in undercut, Bringing in complex work has brought difficulties. In the past encountered such a situation, first, more slices of the two dumped abutment, appropriate to reduce the undercut, the second is to remove more dumped abutments, otherwise it can not be repaired. In recent years, due to medical