The prevalence of<unk>  is unknown but it is a very rare disorder.<unk>  occurs in less than 2-8% of the general population in regards to permanent teeth and 0.1-0.7% in primary teeth. Gender and ethnicity do not play a role in<unk> .
Anodontia
Hypodontia
Maxillary hypoplasia
Hemifacial microsomia
Micrognathism
Macrodontia 
Oxycephaly
Iniencephaly