We always recommend you ask your orthodontist what kind of mouth guard they suggest for you or your child's ortho treatment. Both our High Impact mouth guards, and our Extreme Impact mouth guards can be worn with braces. They can be refitted multiple times, so we suggest you refit your mouth guard after every adjustment or when the mouth guard starts to feel tight. Keep in mind our mouth guards only cover the upper teeth. Also, they will not fit if your child has an expander.