developmental and odontogenic cysts day 1

Question 1

non-odontogenic cysts

Answer 1

NP duct cyst and median palatine cyst

Question 2

CYST DEFINITION

Answer 2

Epithelial lined pathologic cavity

Question 3

Nasopalatine Duct Cyst
* where?
* common?
* arises from?
* what type of teeth?
* demo?

Answer 3

• Incisive Canal Cyst
• Most common non-odontogenic cyst of oral
  cavity
• A developmental cyst that arises from epithelial remnants of nasopalatine duct
• Vital teeth
• Adults - 4th to 6th Decades

Question 4

Answer 4

NP duct cyst

Question 5

when is there pain/drainage with NP cyst

Answer 5

when 2 infection occurs

Question 6

Signs/Symptoms associated with
Nasopalatine Duct Cyst
upper limit for normal canal radio app

Answer 6

• Radiolucency - 0.6 cm is the upper limit of normal for the incisive foramen
• Swelling of anterior palate
• Drainage and pain, if inflamed

Question 7

what can be in the walls of a NP duct cyst

Answer 7

vessels, nn, and inflammatory cells

Question 8

dif dx of median palatine cyst to NP duct cyst

Answer 8

MP cyst usually more posterior

Question 9

Median Palatine Cyst
* app?
* histo
*difficult to distinguish from?

Answer 9

]* Well-circumscribed palatal lucency
* Epithelium entrapped during fusion of palatal shelves
* Stratified squamous or pseudostratified columnar, possible cilia
* May be difficult to distinguish from Nasopalatine Duct Cyst (identical histo)

Question 10

Answer 10

median palatine cysts

Question 11

8/9 with NP duct cyst

Answer 11

teeth are vital

Question 12

types of odontogenic cysts

Answer 12

INFLAMMATORY CYSTS AND DEVELOPMENTAL CYSTS

Question 13

INFLAMMATORY ODONTOGENIC CYSTS

Answer 13

Periapical Cyst
Residual Cyst
Buccal Bifurcation Cyst

Question 14

Periapical Cyst (Radicular Cyst)
where? from what cells? radio?

Answer 14

• Apex of non-vital tooth
• Arises from rests of Malassez
• well defined unilocular radiolucency

Question 15

median vs NP cyst

Answer 15

radiographically: median palatine cyst will be more posterior
clinically: more posterior swelling on palate

Question 16

tooth is noon vital, what could this be?

Answer 16

PA cyst, abcess, or granuloma

Question 17

PA cyst pathophysiology

Answer 17

infection out apical foramen, infects the bone> inflamm cells causes rests of Malassez to proliferate

Question 18

can there be many PA cysts?

Answer 18

yes, multiple unilocular well defined lucencies

Question 19

what cells can be in the conn tissue walls of cysts?

Answer 19

inflammatory cells

Question 20

residual cyst

Answer 20

PA cyst left at apex of extraction site

Question 21

residual PA granuloma

Answer 21

same as cyst of gramuloma instead, no epithelial lining with granuloma

Question 22

residual PA abcess

Answer 22

same as other but would see pus/ many PMN’s

Question 23

Buccal Bifurcation Cyst

Answer 23

• Paradental cyst
• Buccal bifurcation of vital mandiblar molar teeth with
  cervical enamel projection

Question 24

buccal bifucation cyst radio

Answer 24

well defined luceny at molar

Question 25

Buccal Bifurcation Cyst app

Answer 25

cyst at buccal aspect of molar at bifurcation

Question 26

what can inflammation do to the cyst epithelium?

Answer 26

make it hyperplastic

Question 27

what is in the conn tissue wall of cysts?

Answer 27

inflam cells

Question 28

DEVELOPMENTAL ODONTOGENIC CYSTS

Answer 28

Dentigerous Cyst Eruption Cyst Dental Lamina Cyst Odontokeratocyst Calcifying Odontogenic Cyst Glandular Odontogenic Cyst

Question 29

Dentigerous Cyst * common? * Arises from? attatched? *what is the upper limit for follicle size before we consider this?

Answer 29

* Most common type of developmental odontogenic cyst * Arises from dental follicle - attached to the cervix, enclosing the crown of an unerupted tooth that is impacted * Enlarged follicular space > 4 mm

Question 30

dentigerous cyst app on radio

Answer 30

well defined unilocular pericoronal lucency of impacted teeth

Question 31

hyperplastic follice/ enlarged dental follicle

Answer 31

presents the same as dentigerous cyst but different histo

Question 32

what is req for dentigerous cyst DDx?

Answer 32

impacted teeth

Question 33

describe this lesion

Answer 33

well defined unilocular pericoronal luceny

Question 34

hyperplastic dental follice histo

Answer 34

possess REE not strat sqaumous epi wall (dentigerous cyst)

Question 35

leave residual cyst in bone?

Answer 35

no, increased chance for malignancy to develop

Question 36

Unicystic Ameloblastoma from dentigerous cyst?

Answer 36

can result from dentigerous cyst lining undergoing amelogenesis same radiographic appearence

Question 37

what could this be?

Answer 37

Unicystic Ameloblastoma or dentigerous cyst

Question 38

how is unicystic ameloblastoma dif from dentigerous cyst

Answer 38

different histo and prognosis

Question 39

eruption cyst

Answer 39

* tooth will erupt on its own with gingival swelling surrounding teeth *

Question 40

eruption cyst app?

Answer 40

gingival swelling, may be bluish or normal color

Question 41

eruption cyst histo

Answer 41

normal oral mucosa with a epithelial lining of lumen

Question 42

eruption cyst radio

Answer 42

none, soft tissue cyst would not be seen on radio