People who engage in sports involving a high risk of injury (cheerleading, boxing, martial arts, hockey, football, soccer, etc.) should always wear a mouth guard. Mouth guards are effective in preventing concussions as well as dental and bone fractures.
Mouth Guard

They also reduce the risk and severity of dentition and mouth tissue (lips, cheeks and tongue) injuries. Custom mouth guards made from an impression of your teeth are recommended for best tooth protection.
A properly fitted mouth guard is easy to wear and does not obstruct breathing.
For more details on mouth guards, please ask your dentist.