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Omfs > Ch7 > Flashcards

Ch7 Flashcards

1
Q

Dentigerous Cyst derived from

A

reduced enamel epithelium

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2
Q

Dentigerous Cyst lining

A

Stratified squamous epithelium

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3
Q

Dentigerous Cyst occurs at

A

association with an unerupted tooth

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4
Q

Most common side of Dentigerous cyst

A

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

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5
Q

Dentigerous cyst clinically

A

Asymptotic lesions
Discovered incidentally in radiograph

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6
Q

Large cyst lead to

A

Move teeth
Cause bony expansion

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7
Q

Very large cyst cause

A

Weakness of bone
Risk for pathologic jaw fracture

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8
Q

Dentigerous cyst in radiography’s

A

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

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9
Q

A large Dentigerous cyst in radiograph

A

May give impression of a multiocular process

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10
Q

Why a large Dentigerous cyst give multilocular processes

A

Bc persistence bone trabecula within the radiolucency

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11
Q

What is the central Dentigerous cyst

A

Radiolucency surrounds just the crown of the tooth

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12
Q

What is the lateral Dentigerous cyst

A

develops laterally along the tooth root and
partially surrounds the crown

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13
Q

What is the circumferential Dentigerous cyst

A

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

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14
Q

Any pericoronal radiolucency that is more than 4 or 5 consider

A

Suggestive cyst formation
Should submitted or microscopic examination

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15
Q

Impact canine root angulation chance of eruption

A

Marsupialization

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16
Q

Why Biopsy is necessary for all dentigerous cysts

A

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

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17
Q

Deferential diagnosis

A

Odontogenic keratocyst
Unicystic ameloblastoma
Adenomatoid odontoginc tumor
Ameloblastic fibroma.

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18
Q

Recurrence of Dentigerous Cyst

A

Rare

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19
Q

Eruption cyst results from

A

fluid accumulation within the follicular space of an
erupting tooth.

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20
Q

Eruption cyst epithelium lining

A

reduced enamel epithelium

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21
Q

Eruption cyst Clinically shows

A

Bluish
fluctuant swelling in the mucosa over an
erupting tooth.

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22
Q

Eruption cyst common tooth

A

primary molar, sometimes incisors.

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

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23
Q

Eruption cyst treatment

A

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

Crown of the tooth could be exposed surgically in certain cases

24
Q

Lateral periodontal cyst develops from

A

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

25
Q

Common site of Lateral periodontal cyst

A

mandibular premolar area
occasionally found in the maxillary anterior

26
Q

Radiographically of Lateral periodontal cyst

A

small well demarcated radiolucency with
radio-opaque margin.

27
Q

Lateral periodontal cyst treatment

A

local excision

28
Q

Odontogenic Keratocyst tumor

A

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

29
Q

Odontogenic Keratocyst tumor
derived from

A

remnants of the dental lamina

30
Q

Odontogenic Keratocyst tumor
Cystic lining

A

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

31
Q

Odontogenic Keratocyst tumor
Common site

A

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

32
Q

Radiographic of Odontogenic Keratocyst tumor

A

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

33
Q

When multiple multilocular radiolucencies are noted

A

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

34
Q

lumin of odontogenic keratocyst tumor filled with

A

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

35
Q

Treatment of Odontogenic Keratocyst tumor

A

Enucleation & curettage with peripheral ostectomy.

36
Q

Suggested m echanisms responsible for recurrence

A
  1. Incomplete removal (persistence) of the original cyst due to a
    thin friable lining
  2. Remaining rests of dental lamina
37
Q

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

A

Odontogenic Keratocyst tumor

38
Q

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

A

Calcifying Odontogenic Cyst (COC) Gorlin’s cyst

39
Q

COC may be associated with other odontogenic tumors like?

A

odontoma
Most common

40
Q

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

A

equal frequency in the maxilla & mandible.

Predilection for the incisor and canine areas.
anterior

41
Q

COC is mainly

A

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

42
Q

Treatment of COC

A

Enucleation and curettage

43
Q

Recurrence of COC

A

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

44
Q

Aggressive behavior and recurrence

A

Glandular Odontogenic Cyst
(Sialo-odontogenic Cyst)

45
Q

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

A

Glandular Odontogenic Cyst
(Sialo-odontogenic Cyst)

46
Q

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

A

Most in mandible mainly in anterior region of the jaws

47
Q

Radiographic of Glandular Odontogenic Cyst
(Sialo-odontogenic Cyst)

A

either unilocular or multilocular radiolucency

48
Q

Treatment of Glandular Odontogenic Cyst
(Sialo-odontogenic Cyst)

A

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

49
Q

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

A

Residual cyst

50
Q

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

A

Radicular (Periapical cyst

51
Q

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

A

Radicular (Periapical cyst)

52
Q

lining of radicular periapical cyst

A

Non-keratinized stratified squamous epithelium.

53
Q

Etiology of the Radicular (Periapical cyst)

A

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

54
Q

Radiographically of Radicular (Periapical cyst)

A

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.

55
Q

Treatment of Radicular (Periapical cyst)

A

Extraction and enucleation with histopathologic
examination.

Endodontic therapy of the involved tooth

56
Q

If treatment of Radicular (Periapical cyst)
Failed with therapy

A

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

Omfs (1 decks)

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