在成功的根管治疗术后,继之出现了牙齿组织丧失和新陈代谢的改变,因而牙齿变脆弱而折裂,这就需要采取一些方法来增强牙齿组织。在后牙常需作近中(牙合)远中高嵌体修复。这种嵌体复盖了牙齿的整个(牙合)面,包括颊尖和舌尖以防止牙齿折断。在前牙可遇到两种情况。若余留有适当的牙冠组织可预备足够的长轴壁时,则可采 Following successful root canal therapy, followed by loss of tooth tissue and changes in metabolism, the tooth becomes fragile and fractures, which requires some means to enhance the tooth tissue. In the posterior teeth often need to make near (occlusion) in the mid to high inlay repair. This inlay covers the entire occlusal surface of the tooth, including the buccal and lingual tips to prevent the teeth from breaking. In the front teeth can encounter two situations. If the remaining adequate crown tissue can prepare enough long axis, it can be taken