Root canal teeth wearing braces refers to the root canal treatment after the crown restoration, this situation does not have a specific use of time, if you wear braces to maintain oral hygiene and follow the doctor’s instructions can be used for a long time. 1. Root canal treatment is mainly used for the treatment of pulpitis or apical periodontitis, which is mainly used to remove the necrotic and inflamed pulp tissue in order to achieve the purpose of treatment; however, after the root canal treatment, due to the removal of the pulp, resulting in the loss of blood vessels and nerves in the pulp of the tooth on the nutritional effect, which leads to the tooth body tissues become brittle and easy to be split by the external forces. 2. Therefore, it is generally recommended to do full crown denture repair (i.e., wearing a dental sleeve) to protect the remaining dental tissues after root canal treatment, which can completely encircle the teeth to protect them, in order to effectively withstand the external forces without cracking; after full crown repair, if you maintain oral hygiene and follow the doctor’s advice not to chew too hard and sticky food, the denture can be used for a long time, there is no specific time of use.