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8/10/2019 Odontogenic Tumors.ppt
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D R S A T Y A N A R A I N , M D S
Odontogenic Tumors
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OdontogenicTumors
Epithelial Mixed Mesodermal
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EpithelialOdontogenic
Tumors
AmeloblastomaAdenomatoidodontogenic
tumor
Calcifyingepithelial
odontogenictumor
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Ameloblastoma
This a true neoplasm ofodontogenic epithelium
It is an aggressive
neoplasm the arises fromthe remnants of the dentallamina and dental organ(odontogenic epithelium)
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Ameloblastoma
Benign, locally aggressiveodontogenic tumor. Usually itslowly grows as painless swelling ofthe affected site.
It can occur at any age.
Localized invasion into thesurrounding bone.
80-95% in the mandible (posteriorbody, ramus region). In the maxilla
mostly in the premolar-molarregion.
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Ameloblastoma
Unilocular (small lesions).Multilocular (large discrete areas orhoneycomb appearance)
Smooth, well-defined, well-corticated margins
Adjacent teeth are often displacedand resorbed.
It causes extensive bone expansion.
Incomplete removal can result inrecurrence.
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Ameloblastoma
http://www.usc.edu/hsc/dental/PTHL312abc/312b/10/IMGs/141big.htmlhttp://www.usc.edu/hsc/dental/PTHL312abc/312b/10/IMGs/140big.html8/10/2019 Odontogenic Tumors.ppt
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Ameloblastoma
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Adenomatoid Odontogenic Tumor("Adenoameloblastoma")
These are uncommon ,nonaggressive tumors of
odontoginc epthilum.
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Adenomatoid odontogenic tumor
Features
Benign. Relatively rare.
It occurs in young patients (70% of casesin patients younger than 20 years).
Most common site: anterior maxilla.
Often surrounds an entire uneruptedtooth (most commonly the canine).
Usually well defined, well corticated.Some tumors are totally radiolucent;others show evidence of internalclassification.
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Calcifying epithelial odontogenic tumor(Pindborg tumor
These are rareneoplasms of the tooth
producing apparuts.
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Calcifying epithelial odontogenic tumor(Pindborg tumor
Rare benign neoplasm.
It occurs more often in middle-aged patients.
Usually in mandible.
Small lesions may be radiolucent.In advanced stages irregularlysized calcifications may bescattered in the radiolucency.
It can cause displacement and
impaction of teeth.
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MixedOdontogenic
Tumors
OdontomasAmeloblastic
fibro-odontomaAmeloblastic
fibromaAmeloblastic
odontomaOdontomas
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Odontomas
It is a tumor that isradiogrphically andhistologicallycharacterized by the
production of matureenamel , dentin ,cementum and pulptissue .
Compound # complex
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Odontoma
Features
Relatively common lesion.
It usually occurs in young patients.
Usually asymptomatic.
Failure of eruption of a permanent toothmay be the first presenting symptom.It iscommonly found occlusal to the involvedtooth.
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Odontoma
Features
Two types: complex and compoundodontoma.
Complex odontoma is composed ofhaphazardly arranged dental hard andsoft tissues.
Compound odontoma is composed ofmany small "denticles" .
Well defined. The internal aspect isvery radiopaque in comparison tobone.
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Odontoma
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me o as c roma
These are benign mixedodontogenic tumors .
They are characterized by
neoplastic proliferation ofmaturing and earlyfunctional ameloblasts aswell as the primitive
mesnchymel componentsof the dental papilla
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Ameloblastic fibroma
Benign Rare. Occurs in children andadolescents.
Most common site: mandible posteriorregion.
Often associated with an uneruptedtooth.
Well defined, well corticated. Smalllesions are monolocular. Large lesions
are multilocular.
It may cause displacement of adjacentteeth. Large lesions causebuccal/lingual expansion.
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Ameloblastic fibroma
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Ameloblasticfibro-odontoma
This is an extremely rare lesion. It consists ofelements of ameloblastic fibroma with smallsegments of enamel and dentin.
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Mesodermal
OdontogenicTumors
Odontogenicmyxoma
(myxofibroma)
Cemento-blastoma
Odontogenicfibroma
Odontogenic m oma ( fib )
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Odontogenic myxoma (myxofibroma)
They are benign,intraosseous neoplasmsthat arise from the
mesenchymal portion ofthe dental papilla.
Od i
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Odontogenic myxoma (myxofibroma)
Features
It represents approximately 3 - 6%of all odontogenic tumors. It ispainless and grows slowly.
It can occur at any age but mostcommonly in the second and thirddecades of life.
More often affect the mandible(molar/premolar region).
Od i
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Odontogenic myxoma (myxofibroma)
Features
Typically multilocular (internalsepta- strings of a tennis racket orhoneycomb appearance). Largelesions can have the sun rayappearance of an osteosarcoma.
Often well-defined.
Adjacent teeth can be displaced butrarely resorbed. It causes less bone
expansion than in other benigntumors.
Od i
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Odontogenic myxoma (myxofibroma)
emen o as oma
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emen o as oma
This is a slow growingmesenchymal neoplasmscomposed principally ofcementum.
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Cementoblastoma
Features
Benign neoplasm. Most commonlyin the second and third decade.
Site: usually mandibular premolarand molar regions.
Attached to the root of the affectedtooth. Tooth displacement,resorption are common.
Pain in 50% of the cases, swelling.
When radiopaque is usuallysurrounded by a thin radiolucenthalo.
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Radiographic Features
Location:
Periphery:well defined ROwith RL hallo surrounding thecalcified mass.
Internal structure:mixed RL-RO leseions may be amorphous
Effect on surrounding tissues:
expansion, external rootresorption
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CEMENTOBLASTOMA
on ogen c
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on ogen cfibroma
Features
Rare neoplasm. More often betweenthe ages 10 and 40 years.
Asymptomatic or swelling and toothmobility
More common sites: mandible(premolar-molar region), maxilla(anterior region)
Small lesions are usually unilocular,and larger lesions multilocular.
Well-defined margins.
Adjacent teeth: often displaced,impaction, root resorption.
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