Radiolucencies

Question 1

how should you report on a radiograph?

Answer 1

• the type of radiograph
• the name of patient and date taken
• grading of radiograph - is it acceptable or not
• teeth present
• any abnormalities and their description

Question 2

what is this?

Answer 2

the maxillary sinus
lies above the premolar/molars

Question 3

what is this?

Answer 3

mandible thinning on the lingual surface

Question 4

what is this?

Answer 4

Stafne’s Idiopathic Bone Cavity
- looks like a cyst but isnt
- always in the posterior mandible
- usually below the IAD

• well define with an opaque margin
• doesn’t move or change shape in monitoring pics
• caused by an indentation of the sublingual salivary gland

Question 5

what is this?

Answer 5

a dentigerous cyst
- a cyst forming around the crown of an unerupted tooth
- always forms from the CEJ of the tooth and follows the outline of the crown

Question 6

what is this?

Answer 6

Lateral Periodontal Cyst - in-between the teeth and if the teeth are vital

if the tooth was non-vital, would be a Lateral Radicular Cyst

Question 7

define Cyst

Answer 7

an epithelial lined cavity

Question 8

can you distinguish a cyst from a granuloma on a radiograph?

Answer 8

no

Question 9

which cyst is always related to non-vital teeth?

Answer 9

radicular cyst

Question 10

what is a dentigerous cyst always associated with?

Answer 10

an unerupted tooth and beginning from the CEJ

Question 11

what is a Giant Cell Granuloma?
- describe the features
- what disease is it linked to and what should be checked?

Answer 11

benign lesion with the potential of becoming aggressive
- can either be peripheral (gingiva or alveolar mucosa) or central (in the bone)

features:
- swelling of the gingivae or jaw
- tooth displacement or root resorption
- pain

it is linked to hyperparathyroid disease
- check the Ca levels

Question 12

what is Cherubism?
- aetiology
- how does it appear on a radiograph

Answer 12

bilateral tumour in children

aetiology: autosomal dominant inheritance

radiograph: multi-oculated

Question 13

what is an Ameloblastoma?
- how does it appear on a radiograph?

Answer 13

a locally aggressive odontogenic tumour

radiograph:
- multi-ocular
- well defined
- root resorption

Question 14

what is the most common oral cancer?
- how does it appear on radiograph?

Answer 14

Primary Squamous Cell Carcinoma.

radiograph:
poorly define
no cortication
destroying bone