Braces belong to fixed prosthesis restoration, braces can protect teeth from splitting due to excessive biting force, and also can repair the missing teeth area and restore the bite. 1. Protect the teeth. Generally, after root canal treatment, the tooth’s fracture resistance is not as good as the living pulp tooth, when chewing hard objects are prone to splitting, so the crown part of the tooth is ground down to make a brace on the top, which can protect the tooth and effectively prevent the tooth from splitting and fracturing. 2. Restore the missing teeth. Braces can also be connected with the bridge to form a fixed bridge to repair the missing teeth, at this time, the braces are fixed on the teeth, mainly play a role in dispersing the role of the jaw force, which restores the occlusal function, but also restores the aesthetics. Making braces needs to be done in a regular hospital.