修复残根残冠,使其恢复牙体功能,越来越受到临床医生的重视,利用根管治疗过的磨牙牙根,做桩冠修复,越来越普遍。但磨牙桩冠的主要困难,是多桩钉的共同就位道问题[1-3]。我们利用铸造桩和根管钉联合做核修复残根残冠,而后全冠修复,解决了分叉式冠桩、螺丝桩核的制作繁琐或仅用根管钉与银汞或树脂做核强度不足的问题。自 Repair residual root crown, to restore the function of the teeth, more and more clinicians pay attention to the use of root canal treatment of the molar root, do crown restoration, more and more common. But the main difficulty of molar crown is the common problem of multi-pile nail [1-3]. We use the cast pile and root canal nail to do joint repair of residual root crown, and then crown repair, to solve the bifurcated crown pile, screw pile core production complicated or only with the root canal nail and silver mercury or resin core strength Insufficient problem. from