Exam 2-Odontogenic Cysts

Question 1

Which two odontogenic cysts are considered inflammatory? What are the rest considered?

Answer 1

1.Radicular cyst 2.buccal bifurcation cyst…the rest are developmental

Question 2

What is a cyst arising from degeneration of enamel organ prior to tooth formation aborts odontogenesis resulting in radiolucency in place of a missing tooth? What is the most common location?

Answer 2

primordial cyst….mandibular 3rd molar

Question 3

What is a cyst resulting from separation of the follicle from around the crown of developing tooth? Where are the 2 most common locations?

Answer 3

Denti-gerous cyst (follicular cyst)…mand 3rd molars, maxillary canines

Question 4

Radiographic findings of a WHAT?: Well circumscribed pericoronal radiolucency. From CEJ around crown.

Answer 4

Denti-gerous Cyst

Question 5

The hits of a dentigerous cyst is stratified squamous epithelium WITHOUT __________

Answer 5

keratinization

Question 6

A. _______ cyst – a dentigerous cyst that gets pushed into oral cavity by erupting tooth, may treat with decompression so tooth can erupt

Answer 6

Eruption

Question 7

What is the neoplastic potential for a dentigerous cyst?

Answer 7

Neoplastic potential – Exceedingly rare

Question 8

What is the Most common of all odontogenic cysts??

Answer 8

Apical Periodontal cyst

Question 9

________ cyst arises from cystic degeneration of rests of Malassez in PDL. Teeth vital, ↑↑ MdCu-Bi.

Answer 9

lateral periodontal

Question 10

Lateral Periodontal cyst arises from cystic degeneration of __________ in PDL. Teeth vital, WHICH TEETH ARE MOST AFFECTED??

Answer 10

rests of Malassez…mand canines and PM

Question 11

A variant to the lateral periodontal cyst is the _______ odontogenic cyst – polycystic, multilocular, may recur after removal.

Answer 11

Bo-try-oid

Question 12

_______ (dental lamina cyst) – Soft tissue cysts on gingiva or alveolar ridge from degenerating dental lamina…Very common, Congenital or early life, Small yellowish elevations…WHAT IS THE TX?

Answer 12

Newborn…no Tx

Question 13

Where are adult gingival cysts most common and what is the treatment?

Answer 13

mandibular canines and PM..excision

Question 14

What is a developmental cyst from dental lamina? How much of these are parakeritinized and how much are orthokeratinized?

Answer 14

Odontogenic Keratocyst….90% para, 10% ortho

Question 15

When are parakeratinized odonntogenic keratocysts most common? Which arch do they occur more in?

Answer 15

6-7 decades…2:1 mandibular

Question 16

How many parakeratinized odontogenic keratocysts recur after excision?

Answer 16

1/3

Question 17

WTF? About ___% of patients with keratocyst have, almost all multiple OKCs

Answer 17

5%

Question 18

Watch out because the 5% of patients with keratocyst have Basal cell nevus-______ syndrome, which is an autosomal dominant malignancy…

Answer 18

Basal cell nevus-bifid rib syndrome

Question 19

Keratocysts known for: 1. Clinical ___________ 2. Recurrence after removal… Association with basal cell nevus-_______ syndrome

Answer 19

aggressiveness… Recurrence..bifid rib

Question 20

Which type of keratocyst is Smaller, less aggressive, minimal recurrence, not associated with syndrome?

Answer 20

orthokeratinized odontogenic cysts

Question 21

VIII. Calcifying odontogenic cyst (aka ______ Cyst)

Answer 21

Gorlin

Question 22

Which cyst?Any age, ↑ Md, maybe associated with unerupted teeth or odontomas… Asymptomatic, rarely expansion, occur extraosseously

Answer 22

Calcifying odontogenic cyst (aka Gorlin Cyst)

Question 23

Do goblin cysts have recurrence?

Answer 23

low recurrence

Question 24

Woah, these are found in the mandible, can be large and have a 30-50 % recurrence rate…(hint: histo-Cyst showing glandular differentiation (mucus cells, columnar epithelium with cilia, lumina)

Answer 24

Glandular odontogenic cyst

Question 25

Inflammatory cyst occurring on buccal of erupting tooth… 2names…

Answer 25

Buccal Bifurcation cyst/ paradental cysts

Question 26

Since Buccal Bifurcation cyst/ paradental cysts occur on erupting teeth, children are most affected…but which tooth is most common?

Answer 26

mand 1st molar

Question 27

Do you have to extract the tooth if you notice a Buccal Bifurcation cyst/ paradental cyst?

Answer 27

nope