Dental Cysts Flashcards
(33 cards)
What is a cyst?
A cyst is a pathological cavity that is fluid filled, semi-fluid filled or has gaseous contents and is not filled with pus
When might a cyst have pus?
If cyst is secondarily infected
How can we describe cystic lesions?
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
Why might we detect an asymptomatic cysts?
During routine radiographs
What are most cysts? Benign or malignant?
Benign
What are some signs and symptoms of a cyst?
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
How do we detect cysts?
Clinical history and radiography
What is the first line of imagine for cysts?
PA - captures small lesions/cysts
Occlusal - maxillary true occlusal - if lesion larger and PA not sufficient
OPT - posterior mandible, large cysts
What supplemental imaging can we for for cysts?
CBCT - can see buccal lingual expansion of cysts
What are the 7 radiographic features of cysts?
LOCATION
SHAPE
MARGINS
LOCULARITY
MULTIPLICTY
EFECT ON SURROUNDIGN ANATOMY
DOES IT INCLUDE UNERUPTED TEETH?
What are the locations of a cyst?
Maxilla
Mandible
Location to tooth - around crown, around apex
How do cysts grow?
By hydrostatic pressure and grow in path of least resistance (think of it like a ballon water filled in fingers)
How do cysts grow along bone?
Tend to grow along trabecular bone before pushing up against dense cortical bone (more medial and distal expansion before buccal lingual)
What is a corticated margin?
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
What are margins of cysts often like?
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
What is the locularity of cysts like?
Often unilocular ( single cavity that contains no internal echoes)
can be multilocular or pseudolocular
What does pseudolocular mean?
unilocular lesion but has scalloped margin
What does multiplicity of cysts mean?
How many cysts there are
single
bilateral
multiple
What do bilateral or multiple cysts tend to be related to?
Syndromes
What effect can cysts have on surrounding anatomy?
Can displace cortical bone
can affect adjacent teeth and displace them
can affect maxillary sinus
can effect IAN
can effect mental nerve
Do we get root resorption in cyst formation?
No! However if cyst is chronic and been there long term it can occur
How are most cysts defined as being?
Well defined, corticated, unilocular asymptomatic lesions
What happens if cysts get infected?
Accumulation of pus, loss of definition and cortication of margins (wont see this radiopaque line and lesion can become symptomatic)
If we see a lesion, painful swelling with poorly defined margin what must we not rule out?
Infected cyst!
