In dentistry,<unk>  is the condition at which the patient has missing teeth as a result of their failure to develop.<unk>  describes a situation where the patient is missing up to 6 teeth, excluding the 3rd molars. Missing third molars occur in 9-30% of population.  In primary dentition the maxilla is more affected, with the condition usually involving the maxillary lateral incisor.
Hypodontia
Anodontia
Micrognathism
Hemifacial microsomia
Iniencephaly
Elfin facies
Low-set ears
Microcephaly