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BDS4 Radiology > Dental Cysts > Flashcards

Dental Cysts Flashcards

1
Q

What is a cyst?

A

A cyst is a pathological cavity that is fluid filled, semi-fluid filled or has gaseous contents and is not filled with pus

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2
Q

When might a cyst have pus?

A

If cyst is secondarily infected

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3
Q

How can we describe cystic lesions?

A

Diverse group of lesions - can be asymptomatic but may end up becoming symptomatic

Often slow growing but can grow fast

and can cause bone destruction

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4
Q

Why might we detect an asymptomatic cysts?

A

During routine radiographs

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5
Q

What are most cysts? Benign or malignant?

A

Benign

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6
Q

What are some signs and symptoms of a cyst?

A

Often asymptomatic

Swelling - often buccal expansion

Blueish disclouration

Tooth mobility

Absence of tooth that hasn’t erupted

Tingling/altered sensation - to lip, cheek

Spaces in dentition that weren’t there before

Altered occlusion

Pain

Tooth discolouration

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7
Q

How do we detect cysts?

A

Clinical history and radiography

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8
Q

What is the first line of imagine for cysts?

A

PA - captures small lesions/cysts

Occlusal - maxillary true occlusal - if lesion larger and PA not sufficient

OPT - posterior mandible, large cysts

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9
Q

What supplemental imaging can we for for cysts?

A

CBCT - can see buccal lingual expansion of cysts

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10
Q

What are the 7 radiographic features of cysts?

A

LOCATION

SHAPE

MARGINS

LOCULARITY

MULTIPLICTY

EFECT ON SURROUNDIGN ANATOMY

DOES IT INCLUDE UNERUPTED TEETH?

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11
Q

What are the locations of a cyst?

A

Maxilla

Mandible

Location to tooth - around crown, around apex

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12
Q

How do cysts grow?

A

By hydrostatic pressure and grow in path of least resistance (think of it like a ballon water filled in fingers)

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13
Q

How do cysts grow along bone?

A

Tend to grow along trabecular bone before pushing up against dense cortical bone (more medial and distal expansion before buccal lingual)

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14
Q

What is a corticated margin?

A

A corticated border. This describes a sharp opaque usually curved line

This is usually seen with a well-defined lesion, where there is a thin, radio-opaque outline surrounding the lesion. This is often seen with cyst

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15
Q

What are margins of cysts often like?

A

Well defined, corticated (sharp radiopaque line)

his is usually seen with a well-defined lesion, where there is a thin, radio-opaque outline surrounding the lesion. This is often seen with cyst

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16
Q

What is the locularity of cysts like?

A

Often unilocular ( single cavity that contains no internal echoes)

can be multilocular or pseudolocular

17
Q

What does pseudolocular mean?

A

unilocular lesion but has scalloped margin

18
Q

What does multiplicity of cysts mean?

A

How many cysts there are
single
bilateral
multiple

19
Q

What do bilateral or multiple cysts tend to be related to?

A

Syndromes

20
Q

What effect can cysts have on surrounding anatomy?

A

Can displace cortical bone

can affect adjacent teeth and displace them

can affect maxillary sinus

can effect IAN

can effect mental nerve

21
Q

Do we get root resorption in cyst formation?

A

No! However if cyst is chronic and been there long term it can occur

22
Q

How are most cysts defined as being?

A

Well defined, corticated, unilocular asymptomatic lesions

23
Q

What happens if cysts get infected?

A

Accumulation of pus, loss of definition and cortication of margins (wont see this radiopaque line and lesion can become symptomatic)

24
Q

If we see a lesion, painful swelling with poorly defined margin what must we not rule out?

A

Infected cyst!

25
Q

What aret the two types of origins of cysts?

A

Odontogenic

Non odontogenic

26
Q

What are the two pathogenesis of odontogenic cysts?

A

Developmental odontogenic cysts (Dentogerous/erption cyst, OK, lateral periodontal cyst)

Inflammatory (radicular/residual, inflammatory collateral cyst)

27
Q

What are the types of developmental odontogenic cysts?

A

Dentigerous cysts (and eruption cysts)
Odontogenic Keratocyst
Lateral Periodontal cysts

28
Q

What are they types of inflammatory odontogenic cysts?

A

Radicular cysts (residue cysts)
Inflammatory collateral cysts (paradental cyst and buccal bifurcation cysts)

29
Q

What are inflammatory collateral cysts?

A

These are odontogenic inflammatory cysts that can be

Buccal bifurcation cysts
paradental cysts

30
Q

What are the classifications of non-odontogenic cysts?

A

Developmental (nasopalatine duct cyst)

Other (solitary bone cyst and aneurysmal cysts)

31
Q

What are some developmental non-odontogenic cysts? 1

A

Nasopalatine duct cysts

32
Q

What are some other non-odontogenic cysts?

A

Aneurysmal bone cyst
solitary bone cysts

33
Q

Which cysts have no epithelial lining?

A

Non-odontogenic other cysts:

  • aneurysmal cysts
    solitary bone cysts

BDS4 Radiology (2 decks)

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