When playing any sport that has a significant risk of injury, everyone should wear a mouth protector, especially those that wear braces or have dental work. Mouth protectors can help prevent major injury, such as broken teeth, in the mouth by cushioning the upper teeth. A mouth protector creates a wall between your braces and your cheeks. Although mouth protectors typically only cover the upper teeth, your dentist may suggest that you use a mouth protector on the lower teeth if you have braces on these teeth too. Make sure the mouth guard properly fits to your mouth while you are wearing it, making it easy to talk and breathe.