Biting into something hard such as candy or ice, grinding your teeth (bruxism), eating and drinking hot and cold things back and forth, accidentally hitting your tooth on a hard surface, or having an accident such as falling off your bike, are all reasons why someone could crack or chip their teeth. Teeth can crack or break due to a wide variety of causes, and it is always a frightening experience. In such an alarming situation, it’s good to know what to do when you have a chip or cracked tooth.