After root canal treatment, mainly through the height of the crown, residual tooth tissue, tooth position to choose a high inlay or crown, there is no such thing as which one is better, the appropriate can be. 1. Crown height: some posterior teeth with short crowns and insufficient height, choose crowns to repair insufficient retention force, easy to fall off, usually choose high inlays with longer margin lines. 2 . Residual dental tissue: root canal treatment is mostly progressed by caries, often accompanied by obvious dental defects, if too much dental defects, insufficient support, it is recommended that crown restoration is carried out after staking; if there is much residual dental tissue, there is enough support, high inlays and crowns are available. 3 . Tooth position: crown restoration is recommended for anterior teeth with good aesthetics; posterior teeth are fine if conditions allow. It is recommended to go to a regular hospital stomatology department and follow the advice of a professional physician.