Odontogenic Tumours 1

Question 1

Neoplasm?

Answer 1

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 .

Question 2

Malignant neoplasm?

Answer 2

Has the capability of invading and destroying adjacent structures and spreading to distant sites (matastisising)

Question 3

Hamartoma?

Answer 3

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

Question 4

Choristoma?

Answer 4

Microscopically normal cells or tissues in abnormal locations

Question 5

Types of odontomes?

Answer 5

Invaginates odontomes

Evaginated odontomes

Enamel pearl

Complex odontomes

Compound odontomes

Question 6

What are odontomes?

Answer 6

Can be malformations or hamartomes

E.g. enamel pearl is an actual mass

Question 7

Invaginated dontomes?

Answer 7

Dens Invaginatus, dens in dente

Invaginated of a part of the enamel organ int the dental papilla

Question 8

Clinical presentation of the Invaginated odontomes?

Answer 8

Majority in th coronal part

Maxillary lateral incisor most commonly affected

Variable degree

Range from deep congulum pt to gross change with dilated root

Question 9

Radiographic representataion of Invaginated odontomes?

Answer 9

Invaginated line by enamel

Dens-in-dente

Dilated or gesetant Invaginated odontomes

Question 10

histopathiioyy of Invaginated odontomes?

Question 11

Pathogeneiss of Invaginated odontomes?

Answer 11

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)

Question 12

Evaginated ego tomes?

Answer 12

Dens evaginatus

Uncommon

Extra cusp-like tubercles

Occlusal surfaces of premolars, palatal, surface of incisors (talon cusps)

Enamel covered

Easily fractured

Question 13

Enamel pearls?

Answer 13

Enameloma

Small droplet of enamel on the root near the furcation

Maxillary molars

Close to CEJ

Budding of hertwigs root sheat

Differentiation of ameloblasts

Question 14

Histopathology of enamel pearls?

Answer 14

Consists many of enamel

Could contain: enamel, enamel and dentine and sometimes some pulp tissue

Question 15

2 types of odontomes?

Answer 15

Complex

Compound

Limited growth potential

Question 16

What is complex odontomes?

Answer 16

A hamartoma; mass of haphazardly arranged dental tissue

Question 17

Complex odontomes growth potential/

Answer 17

Limited

Question 18

Clinical presentation of complex odontomes?

Answer 18

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

Question 19

Complex odontomes tumour or not?

Answer 19

Odontogenic tumour - lasted WHO

Question 20

What do multiple complex odontomes medicate?

Answer 20

Gardener’s syndrome

Question 21

Radiography of complex odontomes?

Answer 21

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

Question 22

Histopathology of complex odontomes?

Answer 22

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

Question 23

Why is it called compound odontomes?

Answer 23

Number out small denticles

(Small tooth like structures)

Question 24

Clinical presentation of compound odontomes?

Answer 24

First 2 decades

Anterior maxilla

Crown unerrupted teeth

More limited growth potential, less bone expansion

Question 25

Radiogrpahic representaionof compound odontomes?

Answer 25

The developing odontomes may appear as radiolucency or mixed lesion

Mature odontomes appear as distinct denticles (bag of teeth)

Question 26

Histopathology of compound odontomes?

Answer 26

Each denticles has normal enamel, dentine, cementum and pulp arranged like normal teeth