Cysts of the Jaw

Question 1

What is a cyst?

Answer 1

Pathological fluid fuelled cavity lined by epithelium

Question 2

What are the two types of cyst in the jaw?

Answer 2

Odontogenic and non-odontogenic

Question 3

What is an odontogenic cyst?

Answer 3

Cyst lined w/ odontogenic epithelium arising from dental lamina which originates from proliferation of rests of malassez

Question 4

Where do odontogenic cysts affect?

Answer 4

Only tooth bearing regions

Question 5

What is a non-odontogenic cyst?

Answer 5

Cyst lined by non-odontogenic epithelium usually developmental in origin

Question 6

What are common features of cysts?

Answer 6

Sharply defined radiolucency w/ smooth border

Slow growing, displace rather than resorb teeth

Question 7

What would aspiration of cyst show?

Answer 7

Fluid consent - exclude solid lesion

Question 8

Are cysts symptomatic?

Answer 8

Usually symptomless unless infected

Question 9

What type of cyst is a radicular cyst?

Answer 9

Odontogenic and inflammatory

Question 10

What is a radicular cyst?

Answer 10

A cyst on the apex of a non-vital tooth

Question 11

Most common people for radicular cyst to affect?

Answer 11

20-60yrs

Males> females

Question 12

What are are most common for radicular cyst?

Answer 12

Maxilla > mandible

Question 13

What will you see radiographically on radicular cyst?

Answer 13

Rounded and sharply defined radiolucency associated w/ apex of root
Non-vital tooth from which cyst originated from will be evident

Question 14

What is a residual cyst?

Answer 14

Radicular cyst which remain after causative tooth has been removed

Question 15

Treatment of radicular cyst?

Answer 15

Enulceation - will not recur

Question 16

What is a lateral radicular cyst?

Answer 16

Radicular cyst that forms at side of non-vital tooth - at opening lateral branch of root canal

Question 17

Problem w/ lateral radicular cyst?

Answer 17

Need to be differentiated from periodontal cyst

Question 18

What is a residual radicular cyst?

Answer 18

Radicular cyst that has persisted after causative tooth has been extracted?

Question 19

What are the features of a residual cyst?

Answer 19

Same as radicular cyst

Question 20

What types of cyst is a dentigerous cyst?

Answer 20

Odontogenic cyst

Question 21

What is a dentigerous cyst?

Answer 21

A cyst that forms around the crown of an unerupted tooth w/ epithelium lining attached CEJ

Question 22

How do dentigerous cyst occur?

Answer 22

Follicular expansion due to separation of the reduced enamel epithelium and then enamel

Question 23

How do dentigerous cyst prevent the tooth from erupting?

Answer 23

The cyst wall is attached to the neck of the tooth preventing eruption

Question 24

What can dentigerous cyst cause?

Answer 24

Displacement of teeth

Question 25

What teeth are common to see dentigerous cyst?

Answer 25

Lower 3rd molar > upper canine > lower premolar

Question 26

What see radiographically on dentigerous cyst?

Answer 26

Well circumscribed, rounded and unilocular radiolucency Displacement structures Expansion

Question 27

How treat dentigerous cyst?

Answer 27

Enucleation w/ removal of the unerupted tooth

Question 28

What is an eruption cyst?

Answer 28

A superficial dentigerous cyst arising on tooth during eruption

Question 29

How do eruptions cyst present?

Answer 29

Often in children Soft, rounded swelling on alveolus Dark blue colour

Question 30

What can happen to eruption cyst?

Answer 30

Often burst spontaneously and the tooth will erupt

Question 31

Treatment of eruption cyst?

Answer 31

Often burst spontaneous | If large may need incised/ removed