Although the enamel that covers your teeth is the hardest, most mineralized tissue in the body, its strength has limits. Falling, receiving a blow to the face, or biting down on something hard -- particularly if a tooth already has some decay -- can cause a tooth to chip or break.
Causes of cracked or chipped teeth
There are several causes that can lead to cracked teeth
Chewing on hard objects or food such as ice, nuts or hard candy
Accident, fall or blow to your mouth
Grinding and clenching your teeth
Brittleness of teeth that has undergone root canal treatment and has not received crown
When should I see a dentist about cracked or chipped tooth?
See your dentist as soon as possible for a chipped or cracked tooth. If not done so, the tooth could be damaged further or become infected, possibly needing extraction.