Classification & external resources
In dentistry, hypodontia is the condition of naturally having fewer than the regular number of teeth. Hypodontia explains a situation when there is a missing number of 6 teeth or less. The condition of missing over 6 teeth is called oligodontia.
Additional recommended knowledge
In whites, the most commonly missing teeth are the wisdom teeth (25-35%), the upper lateral incisors (2%) or the lower second premolars (3%). The congenital absence of all teeth is called anodontia.
Hypodontia is often familial, or associated with ectodermal dysplasia or Down syndrome.
A similar condition is hyperdontia, in which there are more than the usual number of teeth.
|Oral Pathology: Oral pathology (K00-K14, 520-529)|
|Developmental Anomalies||Anodontia/Hypodontia - Hyperdontia - abnormalities of size and form of teeth (Concrescence, Fusion, Gemination, Dens evaginatus/Talon cusp, Dens invaginatus, Enamel pearl, Macrodontia, Microdontia, Taurodontism) - disturbances in tooth formation (Dilaceration, Regional odontodysplasia, Turner's hypoplasia) - other hereditary disturbances in tooth structure (Amelogenesis imperfecta, Dentinogenesis imperfecta, Dentin dysplasia)|
|Hard, Soft and Periapical Tissues||Attrition - Abrasion - Ankylosis - Dental caries - Denticles - Erosion - External resorption - Fluorosis - Gingivitis - Impaction - Internal resorption - Periodontitis - Pulpitis - Ulcer|
|Dentofacial Anomalies||Malocclusion - Micrognathism - Prognathism - Retrognathism - Temporomandibular joint disorder|
|Maxillomandibular anomalies||Odontogenic keratocyst - Torus mandibularis - Torus palatinus - Cherubism - Ameloblastoma|
|Salivary glands||Drooling - Benign lymphoepithelial lesion - Necrotizing sialometaplasia - Ranula - Sialadenitis - Sialolithiasis - Stomatitis - Xerostomia - Aphthous ulcer|
|Lip and Oral mucosa||Angular cheilitis - Erythroplakia - Hairy leukoplakia - Leukoplakia|
|Tongue||Geographic tongue - Fissured tongue - Glossitis - Glossodynia - Black hairy tongue|