Teeth fall off a piece of fall off may be calculus, if it is calculus fall off do not need to worry too much, because calculus fall off is a normal phenomenon. If you want to remove more calculus, you can go to a regular dental institution for ultrasonic cleaning to remove the calculus in your mouth completely. If the tooth has no value to be preserved, it can be extracted, and if the tooth still needs to be preserved, it needs to be filled or root canal treatment. In addition, there is a possibility that the tooth is worn out by hard objects, so it is recommended to fill the tooth as soon as possible to avoid pulpitis and tooth decay.