DENT3060 Lecture Notes - Lecture 18: Hyperdontia, Ectodermal Dysplasia, Hypodontia
Document Summary
Too few teeth: agenesis: hypodontia: lack of one tooth, mostly genetic, environmental: trauma, pathology, radiation, infection, oligdontia: generally 6 or more, anodontia: missing all teeth, most common: third molars, md. Inherited disorder of the ectoderm: many different types: hidrotic (sweat glands present), hypohidrotic (sweat glands reduced/absent, presentation, many missing teeth, conical teeth, sparse hair and eyebrows, fragile nails, difficulty tolerating hot weather, respiratory infections. Extra teeth: most common: anterior maxilla, approx 1-3, more common in asian populations, more common in males (2:1, clinical issues, failure of eruption, displacement and rotation, space issues, pathology, alveolar bone grafting. Cleidocranial dysplasia: bone disorder: autosomal dominant inheritance, many supernumerary teeth. Gardner syndrome: can be conical, tuberculate and odontome-like, non-eruption of permanent teeth, absence of clavicles, autosomal dominant, supernumerary teeth, management: extraction, non-extraction and monitoring, osteomas, gastrointestinal polyps. Macrodontia: conjoint teeth an abscess can often form: gemination/duplication, fusion with normal tooth or supernumerary. Dens invaginatus: little tooth formed within a tooth: management: early diagnosis.
