Hyperdontia is the condition of having supernumerary teeth, or teeth which appear in addition to the regular number of teeth.
Supernumerary teeth can be classified by shape and by position. The shapes include:
Supplemental (where the tooth has a normal shape for the teeth in that series);Tuberculate (also called “barrel shaped”); Conical (also called “peg shaped”); Compound odontoma (multiple small tooth-like forms); Complex odontoma (a disorganized mass of dental tissue) When classified by position, a supernumerary tooth may be referred to as a mesiodens, a paramolar, or a distomolar. The most common supernumerary tooth is a mesiodens, which is a mal-formed, peg-like tooth that occurs between the maxillary central incisors.Fourth and fifth molars that form behind the third molars are another kind of supernumerary teeth.