If the tooth is not worn to the extent of root canal treatment, but has formed a deep sockets structure, it can be treated by filling. The details are as follows: 1.Direct filling: including resin filling; 2.Adding inlay: firstly, surface polishing of the affected tooth, removing food residue or pigmentation, or simple treatment of the decayed area, then making suitable inlay in the defective position of the affected tooth, 3D printing and then bonding, not large area grinding, and there is no foreign body feeling.