Odontogenic Tumours 1 Flashcards
Neoplasm?
abnormal mass of tissue the growth of
which exceeds and is uncoordinated with that of the
normal tissues and persists in the same excessive
manner after the cessation of the stimuli which
evoked the change .
Malignant neoplasm?
Has the capability of invading and destroying adjacent structures and spreading to distant sites (matastisising)
Hamartoma?
A mass resembling a tumour that represents anomalous development of tissue natural to a part or organ. Tumour like but non neoplastic overgrowth of tissue that. Is disordered in structure
Choristoma?
Microscopically normal cells or tissues in abnormal locations
Types of odontomes?
Invaginates odontomes
Evaginated odontomes
Enamel pearl
Complex odontomes
Compound odontomes
What are odontomes?
Can be malformations or hamartomes
E.g. enamel pearl is an actual mass
Invaginated dontomes?
Dens Invaginatus, dens in dente
Invaginated of a part of the enamel organ int the dental papilla
Clinical presentation of the Invaginated odontomes?
Majority in th coronal part
Maxillary lateral incisor most commonly affected
Variable degree
Range from deep congulum pt to gross change with dilated root
Radiographic representataion of Invaginated odontomes?
Invaginated line by enamel
Dens-in-dente
Dilated or gesetant Invaginated odontomes
histopathiioyy of Invaginated odontomes?
Pathogeneiss of Invaginated odontomes?
Exaggerated of Cingular pit formation
Active proliferation of an area of the enamel organ proliferating into dental papilla
Displacement of part of the enemale organ into dental papilla. (Tissue pressure)
Evaginated ego tomes?
Dens evaginatus
Uncommon
Extra cusp-like tubercles
Occlusal surfaces of premolars, palatal, surface of incisors (talon cusps)
Enamel covered
Easily fractured
Enamel pearls?
Enameloma
Small droplet of enamel on the root near the furcation
Maxillary molars
Close to CEJ
Budding of hertwigs root sheat
Differentiation of ameloblasts
Histopathology of enamel pearls?
Consists many of enamel
Could contain: enamel, enamel and dentine and sometimes some pulp tissue
2 types of odontomes?
Complex
Compound
Limited growth potential
What is complex odontomes?
A hamartoma; mass of haphazardly arranged dental tissue
Complex odontomes growth potential/
Limited
Clinical presentation of complex odontomes?
Second or third decades, mandibular region
Of associated with drowns or unrelated teeth
Can replace a tooth
Painlessgrowing expansion off teh jaw
Painful if infected
Complex odontomes tumour or not?
Odontogenic tumour - lasted WHO
What do multiple complex odontomes medicate?
Gardener’s syndrome
Radiography of complex odontomes?
Fully formed appear radio plaque
Surrounded with radiolucency zone
Radiating structure
Developing lesions appear as well defined radiolucency lesions with progressive deposition of radio plaque material
Histopathology of complex odontomes?
Fully formed lesions consist of a ass of disorderly arranged enamel, dentine, and cementum
Areas resembling the pulp
Dentine form the bulk
Developing odontomes contain odontogenic epithelium andmesenchyme and structures resembling enamel organs
Why is it called compound odontomes?
Number out small denticles
(Small tooth like structures)
Clinical presentation of compound odontomes?
First 2 decades
Anterior maxilla
Crown unerrupted teeth
More limited growth potential, less bone expansion
Radiogrpahic representaionof compound odontomes?
The developing odontomes may appear as radiolucency or mixed lesion
Mature odontomes appear as distinct denticles (bag of teeth)
Histopathology of compound odontomes?
Each denticles has normal enamel, dentine, cementum and pulp arranged like normal teeth
