A chipped tooth can happen for a variety of reasons, including biting something hard, hitting your mouth, having tooth decay, or grinding your teeth. While you might think having a chipped tooth is no big deal, this can lead to some problems. Sharp edges can cut your inner mouth, while deep chips can impact tooth roots (possibly leading to infections or toothaches), as well as tooth decay (which can cause sensitivity and bad breath). To avoid needing a root canal or extraction, it’s important to have a dentist examine and fix a chipped tooth before the problem gets any worse.