Dental trauma from sporting injury can include damage to the tooth nerve, fractured, cracked or knocked-out teeth, a broken jaw, damage to the tongue. cheeks and cut lips. Unfortunately, a single case of dental trauma can lead to a lifetime of dental treatment in order to maintain the strength and health of the damaged tooth/teeth. Repair work does not last forever, so damaged tooth with often become a lifelong problem. Prevention is always better than the cure, so play hard, wear a mouthguard.