Wearing braces after filling is good for protecting the teeth from excessive chewing force and splitting, restoring the bite function, but wearing braces will cause certain damage to the teeth. 1. Pros: generally teeth for root canal treatment after filling need to wear braces, due to root canal treatment after the strength of the tooth is not as good as the living pulp teeth, by the impact of the chewing pressure may cause the tooth to split fracture, wearing braces can protect the teeth while restoring the chewing function of the teeth. 2. Disadvantages: wear braces need to teeth for dental preparation, will grind away a layer of dental tissue, will cause some damage to the teeth. The advantages of wearing braces after filling generally outweigh the disadvantages, the specific need to do braces need to go to the hospital to check by the doctor to determine.