The evidence that may be derived from teeth, is the age (in children) and identification of the person to whom the teeth belong. This is done using dental records or ante-mortem (prior to death) photographs.
The other type of evidence, is that of bite marks, left on either the vitim (by the attacker), the perpetrator (from the victim of an attack), or on a object found at the crime scene. Bite marks are often found on children who are abusedd.