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AU18: Oral Path 2 > Odontogenic Cysts (3) > Flashcards

Odontogenic Cysts (3) Flashcards

1
Q

What is the most common cyst of the jaws?

A

Periapical cyst

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2
Q

What is the origination of a periapical cysts?

A

Due to inflammatory stimulation of the epithelial rests of Malassez

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3
Q

T/F: Periapical cysts are associated with vital teeth.

A

False

Periapical cysts = non-vital tooth

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4
Q

T/F: Periapical cysts are symptomatic.

A

False

Asymptomatic unless secondarily infected or very large

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5
Q

T/F: Loss of lamina dura is seen with a Periapical cyst.

A

True

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6
Q

What are the histopathological features of a periapical cysts?

A

Granulation tissue lined by non-keratinized stratified squamous epithelium

*if no epithelial lining -> periapical granuloma

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7
Q

What is the treatment/prognosis for a periapical cysts?

A

Endodontic therapy/apicoectomy/extraction

Excellent

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8
Q

T/F: Buccal bifurcation cysts are usually seen in lower molars of children.

A

True

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9
Q

Flat v-shaped extension of enamel into the buccal bifurcation of a mandibular molar can cause what?

A

Buccal bifurcation cysts

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10
Q

In a buccal bifurcation cyst, which way will the apices of the tooth appear to be leaning?

A

Toward the lingual

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11
Q

T/F: A buccal bifurcation cyst has the same histopathological features as a periapical cyst.

A

True

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12
Q

T/F: Treatment for buccal bifurcation cyst is extraction of the tooth.

A

False

Enucleation

Good prognosis

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13
Q

What is the most common developmental odontogenic cyst?

A

Dentigerous cyst

*2nd most common cyst overall after periapical

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14
Q

What is the cause of a dentigerous cyst?

A

Fluid accumulation between crown and reduced enamel epithelium

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15
Q

_____________ are associated with the crown of an unerupted tooth.

A

Dentigerous cysts

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16
Q

If the radiolucency is greater than ________, it is probably a cyst.

A

5mm

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17
Q

Which tooth is the most common to have a dentigerous cyst?

A

Mandibular 3rd molars

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18
Q

What is the treatment/prognosis for dentigerous cyst?

A

Removal of tooth and cyst

Excellent

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19
Q

What type of cyst is sometimes called an “eruption hematoma”?

A

Eruption cyst

Dentigerous cyst that forms in the soft tissue

Bluish swelling

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20
Q

T/F: Eruption cysts must always be unroofed.

A

False

Only if causing problems

21
Q

What is a primordial cyst?

A

Rare lesion that develops in place of a tooth

*to diagnose there must have never been extraction in that area

22
Q

Which lesion is thought to possibly be the same as a primordial cyst?

A

Odontogenic keratocyst (OKC)

23
Q

What is the treatment/prognosis of a primordial cyst?

A

Enucleation

Good

24
Q

What syndrome can an OKC be associated with if multiple are seen?

A

Nevoid basal cell carcinoma syndrome (NBCCS)

25
Q

T/F: OKCs are benign, but more aggressive than other odontogenic cysts.

A

True

26
Q

When is someone most likely to develop an OKC?

A

3rd decade

*anterior maxilla after 70 y.o.

27
Q

T/F: The majority of OKCs are multilocular and develop in the posterior mandible.

A

False

Unilocular and in posterior mandible

28
Q

What are the three histopathological criteria for an OKC?

A
  1. Thin epithelial lining
  2. Corrugated parakeratin surface
  3. Palisaded basal cell layer
29
Q

What is the treatment for an OKC?

A

Smaller - enucleate in one piece

Larger - marsupialization followed by enucleation

30
Q

What is the prognosis for an OKC?

A

Guarded

31
Q

What is a condition that involves multiple odontogenic keratocysts (OKCs) arising at an early age?

A

Nevoid basal cell carcinoma syndrome (NBCCS)

*Gorlin syndrome

32
Q

Which three cysts are inflammatory?

A
  1. Periapical cyst
  2. Residual periapical cyst
  3. Buccal bifurcation cyst

*the rest are developmental

33
Q

What are some clinical features of NBCCS?

A

OKCs in jaws, hypertelorism, large head, frontal bossing, milia and epidermal cysts, and multiple BCCs

34
Q

What might you see in a radiograph of a patient with NBCCS?

A

Calcification of falx cerebri, hypoplastic/bifid rips, multiple OKCs

35
Q

What is also called a dental lamina cyst?

A

Gingival cyst of the newborn

36
Q

What is the average recurrence rate of an OKC?

A

30%

Most will happen within 5 years

Need annual follow up for 7 years

37
Q

What is the treatment and prognosis for gingival cysts of the newborn?

A

No treatment. Excellent prognosis.

38
Q

Where are gingival cysts of the adult most likely to be seen?

A

Facial surfaces in anterior segments of the jaws just below mucogingival junction

39
Q

T/F: No treatment is needed for patients with gingival cysts of the adult.

A

False

Conservative excision; prognosis is excellent

40
Q

T/F: Calcifying odontogenic cysts are more likely to be seen in the mandible.

A

False

Equal in max and mand

41
Q

Where on the jaw do most calcifying odontogenic cysts occur?

A

Incisor-canine region

42
Q

T/F: The majority of calcifying odontogenic cysts are intrabony.

A

True

43
Q

What features are associated with some calcifying odontogenic cysts?

A 
Scattered radiopacities (50%)
Impacted teeth (30%)
Odontomas (20%)
44
Q

What is another term for a calcifying odontogenic cyst?

A

Gorlin cyst

45
Q

In a _____________ cyst, some lesional cells undergo “ghost cell” change then may calcify.

A

Calcifying odontogenic cysts

46
Q

What is the treatment/prognosis for calcifying odontogenic cysts?

A

Enucleation w/ curettage

Good

47
Q

What is the definition of a lateral periodontal cyst?

A

Defined as a non-keratinized developmental cyst occurring adjacent or lateral to the root of a tooth

48
Q

What is the treatment/prognosis of lateral periodontal cysts?

A

Curettage

Excellent

AU18: Oral Path 2 (18 decks)

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