Ch7

Question 1

Dentigerous Cyst derived from

Answer 1

reduced enamel epithelium

Question 2

Dentigerous Cyst lining

Answer 2

Stratified squamous epithelium

Question 3

Dentigerous Cyst occurs at

Answer 3

association with an unerupted tooth

Question 4

Most common side of Dentigerous cyst

Answer 4

Mandibular 3rd molar
Followed by max 3rd molar, max canines
man 2nd premolars, supernumerary teeth and odontomas

Question 5

Dentigerous cyst clinically

Answer 5

Asymptotic lesions
Discovered incidentally in radiograph

Question 6

Large cyst lead to

Answer 6

Move teeth
Cause bony expansion

Question 7

Very large cyst cause

Answer 7

Weakness of bone
Risk for pathologic jaw fracture

Question 8

Dentigerous cyst in radiography’s

Answer 8

well-defined unilocular radiolucency
sclerotic border surrounds the crown of the tooth.

Question 9

A large Dentigerous cyst in radiograph

Answer 9

May give impression of a multiocular process

Question 10

Why a large Dentigerous cyst give multilocular processes

Answer 10

Bc persistence bone trabecula within the radiolucency

Question 11

What is the central Dentigerous cyst

Answer 11

Radiolucency surrounds just the crown of the tooth

Question 12

What is the lateral Dentigerous cyst

Answer 12

develops laterally along the tooth root and
partially surrounds the crown

Question 13

What is the circumferential Dentigerous cyst

Answer 13

the cyst surrounds the crown and the
root surface (entire tooth were located within the cyst).

Question 14

Any pericoronal radiolucency that is more than 4 or 5 consider

Answer 14

Suggestive cyst formation
Should submitted or microscopic examination

Question 15

Impact canine root angulation chance of eruption

Answer 15

Marsupialization

Question 16

Why Biopsy is necessary for all dentigerous cysts

Answer 16

occasional formation of these lesion from the cyst wall
Squamous cell carcinoma
Mucoepidermoid carcinoma
Ameloblastoma.

Question 17

Deferential diagnosis

Answer 17

Odontogenic keratocyst
Unicystic ameloblastoma
Adenomatoid odontoginc tumor
Ameloblastic fibroma.

Question 18

Recurrence of Dentigerous Cyst

Answer 18

Rare

Question 19

Eruption cyst results from

Answer 19

fluid accumulation within the follicular space of an
erupting tooth.

Question 20

Eruption cyst epithelium lining

Answer 20

reduced enamel epithelium

Question 21

Eruption cyst Clinically shows

Answer 21

Bluish
fluctuant swelling in the mucosa over an
erupting tooth.

Question 22

Eruption cyst common tooth

Answer 22

primary molar, sometimes incisors.

If the cyst is incised, a clear or yellowish fluid escapes.

Question 23

Eruption cyst treatment

Answer 23

No treatment
cyst often ruptures spontaneously, permitting the tooth to erupt.

Crown of the tooth could be exposed surgically in certain cases

Question 24

Lateral periodontal cyst develops from

Answer 24

dental lamina and are not inflammatory (do not arise from periodontitis or lateral canals.

Question 25

Common site of Lateral periodontal cyst

Answer 25

mandibular premolar area occasionally found in the maxillary anterior

Question 26

Radiographically of Lateral periodontal cyst

Answer 26

small well demarcated radiolucency with radio-opaque margin.

Question 27

Lateral periodontal cyst treatment

Answer 27

local excision

Question 28

Odontogenic Keratocyst tumor

Answer 28

Two variant sporadic cyst & cyst associated with nevoid basal cell carcinoma syndrome.

Question 29

Odontogenic Keratocyst tumor derived from

Answer 29

remnants of the dental lamina

Question 30

Odontogenic Keratocyst tumor Cystic lining

Answer 30

A uniform layer of stratified squamous epithelium, usually six to eight cells in thickness with parakeratotic surface.

Question 31

Odontogenic Keratocyst tumor Common site

Answer 31

Mandible (60 to 80% of cases) , particularly in the posterior body and ascending ramus. In maxilla third molar area.

Question 32

Radiographic of Odontogenic Keratocyst tumor

Answer 32

Multilocular radiolucency with smooth radio-opaque margins. Less commonly unilocular 40% adjacent to crown of unerupted tooth.

Question 33

When multiple multilocular radiolucencies are noted

Answer 33

incisional biopsy should be done to investigate the possibility of nevoid basal cell carcinoma syndrome

Question 34

lumin of odontogenic keratocyst tumor filled with

Answer 34

foul-smelling cheese like material that is not pus but collected degenerating keratin.

Question 35

Treatment of Odontogenic Keratocyst tumor

Answer 35

Enucleation & curettage with peripheral ostectomy.

Question 36

Suggested m echanisms responsible for recurrence

Answer 36

1. Incomplete removal (persistence) of the original cyst due to a thin friable lining 2. Remaining rests of dental lamina

Question 37

More aggressive than other odontogenic cysts with high rate of recurrence?

Answer 37

Odontogenic Keratocyst tumor

Question 38

its variants as an odontogenic tumor rather than an odontogenic cyst.

Answer 38

Calcifying Odontogenic Cyst (COC) Gorlin’s cyst

Question 39

COC may be associated with other odontogenic tumors like?

Answer 39

odontoma Most common

Question 40

Common site of Calcifying Odontogenic Cyst (COC) Gorlin’s cyst

Answer 40

equal frequency in the maxilla & mandible. Predilection for the incisor and canine areas. anterior

Question 41

COC is mainly

Answer 41

intra-osseous lesion, although 13 to 30% of reported cases occur as peripheral lesions.

Question 42

Treatment of COC

Answer 42

Enucleation and curettage

Question 43

Recurrence of COC

Answer 43

A limited number of have been reported after such treatment. Only a few cases have been reported, a carcinoma arising in a COC.

Question 44

Aggressive behavior and recurrence

Answer 44

Glandular Odontogenic Cyst (Sialo-odontogenic Cyst)

Question 45

generally accepted as being of odontogenic origin, it shows glandular or salivary features.

Answer 45

Glandular Odontogenic Cyst (Sialo-odontogenic Cyst)

Question 46

Common site of Glandular Odontogenic Cyst (Sialo-odontogenic Cyst)

Answer 46

Most in mandible mainly in anterior region of the jaws

Question 47

Radiographic of Glandular Odontogenic Cyst (Sialo-odontogenic Cyst)

Answer 47

either unilocular or multilocular radiolucency

Question 48

Treatment of Glandular Odontogenic Cyst (Sialo-odontogenic Cyst)

Answer 48

Enucleation and curettage with marginal excision. High rate of Recurrence approximately 30%.

Question 49

retained periapical cysts from teeth that have been removed with inadequate removal of cystic lining.

Answer 49

Residual cyst

Question 50

It’s clinically Asymptomatic, sometimes may exhibit mild pain and sensitivity to percussion.

Answer 50

Radicular (Periapical cyst

Question 51

cause bone resorption rather than bone expansion. cyst contains clear pale straw-colored fluid with cholesterol crystals.

Answer 51

Radicular (Periapical cyst)

Question 52

lining of radicular periapical cyst

Answer 52

Non-keratinized stratified squamous epithelium.

Question 53

Etiology of the Radicular (Periapical cyst)

Answer 53

Necrosis of dental pulp Toxins exit the apex of the tooth, leading to periapical inflammation that stimulates the m alassez epithelial rests in the periodontal ligament, resulting in the formation of a periapical granuloma. granuloma becomes a cyst

Question 54

Radiographically of Radicular (Periapical cyst)

Answer 54

round or ovoid radiolucent lesions with a narrow, opaque margin that is contiguous with the lamina dura of the apex of a none-vital tooth. In long standing cysts, root resorption of the offending tooth may noted.

Question 55

Treatment of Radicular (Periapical cyst)

Answer 55

Extraction and enucleation with histopathologic examination. Endodontic therapy of the involved tooth

Question 56

If treatment of Radicular (Periapical cyst) Failed with therapy

Answer 56

treated surgically by (curettage of periapical area ± apecoectomy) and histopathological examination.