Post-root canal braces are supposed to be porcelain crowns, which have the same shape as the teeth normally seen in the mouth, except that they are a cap-like structure with a hollow inside, which can be capped onto the already prepared tooth through the cap, and can exercise the aesthetic and chewing functions of its teeth. Clinically, because the teeth after root canal treatment have no pulp nutrition, so the oral surgeon will recommend such patients, to the restorative dentistry for dental restoration, that is, with braces, which can protect this tooth that has no nerve nutrition for a longer period of time to serve. So the braces after root canal treatment are what is usually called porcelain crowns.