Odontogenic Tumours Flashcards
Name a mesenchymal odontogenic tumour.
Odontogenic myxoma.
Name some epithelial odontogenic tumours.
Ameloblastoma.
Adenomatoid odontogenic tumour.
Calcifying epithelial odontogenic tumour.
Name a mixed odontogenic tumour.
Odontome.
Explain the concept of induction.
Only mixed tumours can have dentine/enamel formation - cannot have enamel without presence of dentine.
What are the Rests of Malassez ?
Remnants of Hertwigs epithelial root sheath, found in the PDL and remain inactive.
What are the Rests of Serres ?
Remnants from dental lamina which were responsible for the formation of tooth germs.
What is the reduced enamel epithelium ?
Remnants of ameloblasts which surrounds the crown to protect enamel during eruption.
After eruption - reduced enamel epithelium becomes the junctional epithelium.
Describe the epidemiology of ameloblastomas ?
More common in men.
Between 4th-6th decades.
Common in posterior mandible.
Describe the radiological appearance of ameloblastomas ?
Translucent lesion which is well-defined, corticated, sometimes with scalloped edges.
Can be unicystic/multicystic.
Multicystic lesions can have soap bubble appearance.
Can displace structures, thinning of bony cortex, knife edge external root resorption.
Describe histology of ameloblastoma ?
Ameloblast-like cells.
Stellate reticulum like tissue.
Cystic change.
Fibrous tissue present but no CT capsule.
How is an ameloblastoma treated ?
Surgical resection - recurrence is common due to no CT capsule, but risk of malignant transformation is uncommon.
How is an odontome similar to teeth ?
Malformation of dental tissues - enamel, dentine, pulp, dental follicle.
Always found above IAC.
Do not grow indefinitely.
Can be associated with dentigerous cysts etc and other odontgenic lesions.
What are the two types of odontomes ?
Compound, complex.
Describe the compound subtype of odontome.
Order dental structures - looks like multiple mini teeth.
Where are compound odontomes most commonly found in the mouth ?
Anterior maxilla.
