Anyone participating in a sport that contains a chance of injury to the teeth, jaws, or oral soft tissues or which shows a potential risk of concussion could benefit from the use of a mouthguard. In general, anyone participating in a contact or collision sport could benefit from a properly fitted and properly worn mouthguard. Participants in an individual sport, such as rollerblading, which puts the athlete at risk, should use a mouthguard. A properly fitted and properly worn mouthguard shouldn't interfere with an athlete performing any sport at the highest level.