Definition: A developmentally missing tooth. The four most commonly missing developmentally teeth (in order of most common to least) are the third molars, second premolars, maxillary lateral incisors and mandibular central incisors.
Location: Anywhere in the maxilla and mandible.
Number: May be single or multiple.
Mandibular second premolar
(note the retained deciduous second molar)
Oligodontia – Mandibular central incisor
Oligodontia – Mandibular second premolar