There are many ways to restore tooth defects, as follows: 1. For small scale tooth defects, when the pulp is still present, direct filling treatment can be chosen. The inlay is a kind of restoration embedded inside the tooth, including metal inlay, resin inlay and all-porcelain inlay, for patients with high aesthetic requirements can use the inlay made of all-porcelain material, which can restore the original color and shape of the tooth and is very beautiful after production; 2. The color and shape of the front teeth can be perfectly restored; 3, for large areas of tooth loss, when the pulp still exists, high inlays can be used to protect the role of the remaining tooth tissue, but also can choose full crowns. In the case of pulp loss teeth or even some teeth with only a residual crown, i.e., a severely damaged crown or remaining residual root, the so-called pile crown can be restored by using a pile bonded to the root canal, which plays a supporting role for the crown, and then restoring the missing part of the tooth by using the nucleus, and finally using the full crown to restore the shape and size of the tooth.