Hypodontia refers to the congenital absence of one or more teeth.
Hypodontia is common, affecting ~15% of the population with a recognized variations in ethnicities, e.g. prevalence of 1% in indigenous Australians through to 30% in Japanese populations. There is a female preponderance with a M:F of 2:3 .
Hypodontia is known to occur with a large range of syndromes but is also common in non-syndromic patients. The third molars are the most commonly absent teeth followed by the lateral maxillary incisors or mandibular pre-molars .