Odontogenic tumours

Question 1

Name 3 origins of odontogenic tumours

Answer 1

1. epithelial
2. mesenchyme
3. mixed

Question 2

What is an Ameloblastoma
Usually has them?
features

Answer 2

Epithelial origin - BENIGN
30-50yr
Asymptomatic, mandible - slow growing locally destructive (mimics malignant neoplasm), recruurence
Multilocular mainly- Plexiform and follicular types
Biopsy and wide surgical excision

Question 3

what can be seen in a clinical exam and on an OPT for an ameloblastoma

Answer 3

Clin - Teeth not TTP, palpable bony swelling, slow growing

OPT - Multilocular, well def, radiopaque margin

Question 4

Adenomatoid odontogenic tumour
origin
when
where
treat

Answer 4

Epithelial
hamartoma (growth of normal tissue but greater and in different place)
age 10-20yr
'dentigerous cyst-like' 
ANTERIOR MAXILLA
Treat - Enucleation

Question 5

Odontogenic Myxoma
origin
when
appearance on Rg

Answer 5

Mesenchymal
30-50yr
Soap bubble appearance (multilocular)
recurrence

Question 6

cementoblastoma

• what
• who
• Does tooth remain vital?
• clinical features
• what tooth
• Rg feaures

Answer 6

benign neoplasm
-mass of cementum on root
-young adults <25yr
VITAL TOOTH
-Slow growing, sometimes painful
lower 1st perm molar
-Radiopaque mass on root, thin radiolucent margin

Question 7

what is a cemento-ossifying fibroma.

• also called (type of)
• originate
• benign?
• age
• Rg appearance
• histology
• management

Answer 7

ossifyying fibroma
-PDL/lamina dura
-BENIGN
-20-40yr
- small radilucency then expands. Starts to calcify
sharp defined margin
-Fibrous dysplasia, well demarcated periphery
-Enucleation