Cysts

Question 1

List 5 examples of epithelial, developmental odontogenic cysts

Answer 1

1. Dentigerous cyst (associated with unerupted 8s and 3s)
2. Eruption cyst
3. Gingival cyst of infants
4. Lateral periodontal cyst
5. Odontogenic keratocyst

Question 2

List 3 types of epithelial inflammatory cysts

Answer 2

• Radicular (apical or residual) cyst
• Paradental cyst
• Buccal bifurcation cyst

Question 3

1 examplesof epithelial NON-odontogenic developmental cysts

Answer 3

• Nasopalatine duct cyst

Question 4

2 examples of NON-epithelial jaw cysts

Answer 4

• Solitary bone cyst
• Aneurysmal bone cyst
• traumatic bone cyst

Question 6

3 origins of odontogenic cysts

Answer 6

1. Epithelial rests of serrez
2. Epithelial rests of malassez
3. Reduced enamel epithelium

Question 7

Pathogenesis of cyst development:

Answer 7

1. Stimulation and proliferation of resting epithelium
2. Develops into a cavity within the bone
3. Osmotic pressure increases, size increases
4. Resorption of bone via inflammatory factors

Question 8

What is the most common type of cyst in the jaw

Answer 8

Radicular cyst (periapical cyst)

Question 9

Describe the histology of a radicular cyst

Answer 9

(Periapical cyst - inflammatory)

May start as a periapical granuloma

Lined by non-keratinised stratified squamous epithelium, lumen filled with cholesterol cleft. FCT wall with intence inflammatory cells.

Question 10

What is a paradental cyst (inflammatory cyst)

Answer 10

Inflammatory cyst causedd by pericoronitis

Question 11

Describe the appearnce of an eruption cyst

Answer 11

• Associated with erupting tooth but in soft tissue
• Bluish swelling
• Spontaneous resolution

Question 12

What are the two variants of the lateral periodontal cyst

Answer 12

• Botyroid cyst
• Glandular odontogenic cyst

Question 13

Rare, recenty recognised benign cyst with an aggressive behaviour. Odontogenic origin.

Answer 13

Glandular odontogenic cyst.

Question 14

What cyst is this describing:

Thin, fibrous wall with uniform 6-8 layers of stratified squamous epithelium with flattened parakeratin.

Basal cell layer is a palisaded layer of cuboidal cells.

Answer 14

Odontogenic keratocyst

Question 15

Name of syndrome which presents with OKCs younger age, more satellite cells, and multiple BCCS

Answer 15

Nevoid Basal cell Carcinoma Syndrome

Question 16

What gene is associated with Nevoid Basal CEll carcinoma syndrome, and OKCs

Answer 16

PTCH gene (tumour suppressor gene)

Question 17

Uncommon developmental cyst that arises in the incisive canal

Answer 17

Nasopalatine duct cyst

Question 19

Place these in order of frequency:

• Dentigerous Cyst
• Radicular cyst
• Nasopalatine cyst
• OKC

Answer 19

1. Radicular cyst
2. Dentigeous cyst
3. OKC
4. Nasopalatine cyst

Question 20

How should non-vital teeth be managed with are in relation to cysts?

Answer 20

Root fill 24 hours prior to surgery, or at time or surgery, possibly with apicetomy.

Question 21

What is the gold standard of treatment for cysts?

Answer 21

Enucleation and primary closure

Question 22

4 indications for marsupialization or decompression of cysts, as opposed to enucleation

Answer 22

1. Unacceptable risk of tissue injury
2. Size of cyst
3. Difficult surgical access
4. Extent of surgery

Question 23

More radical intervention for tx of cysts when enucleation and decompression are not appropriate options:

Answer 23

Resection

Question 24

What is the usual treatment managmeent for soft tissue cysts?

Answer 24

Excision (enucleation difficult due to soft tissue surrounding)