深夜患者上前牙缺失多采用固定桥修复，对上前牙外伤缺失和邻牙因外伤造成牙冠破坏较大，死髓牙者，则不易采用常法固定桥修复。1992年以来，我们采用保留死髓牙牙体外形，利用其根管制作桩冠、甲冠式固位体，对后者进行固定修复12例，现予介绍。方法1．缺牙区的邻近死髓牙先进 Lateral patients on the loss of anterior teeth and more use of fixed bridge repair, loss of teeth on the anterior teeth and adjacent teeth due to trauma caused by greater damage to the crown, dead teeth, it is not easy to use regular fixation bridge repair. Since 1992, we have retained the dead tooth tooth shape, using its root canal production of post crown, a crown-like retainer, the latter for fixed repair in 12 cases, is introduced. method 1. Epididymis near the dead tooth marrow advanced