It is difficult to restore the large defect of pulpless tooth body.The dentinal peg and root canal peg filling were used before, which needed specialized instrumnets and materials.

• 无髓牙牙体大面积缺损的修复是比较困难的,主要有牙本质钉、根管钉桩核等修复方法,均需要专门的工具器械和材料。