Card Set Information
Epithelial cysts can be subdivided into?
Odontogenic cysts originate from residues of tooth forming organ. Name 3 kinds:
Epi rests of Serres e.g. Keratocyst
Epi rests of Malassez e.g. Radicular cyst
REE e.g. dentigerous cyst
What are the most common cysts?
Odontogenic cysts can be inflammatory or developmental. Name the inflammatory cyst:
Most radicular cyst are apical, what other types are there?
Where do radicular cyst commonly occur and why?
Incisors, due to palatal invaginations, silicate restorations, trauma, small teeth
Usually occur after pulp death (non vital tooth)
Chronic infection may stimulate cell rests of Malassez to proliferate
Clinical fts of radicular cyst?
Slowly progressing painless swelling with no symptoms
Round and hard
Bone becomes thin, eggshell thickness, crackling sensation on pressure
Part of wall fully resorbs away, leaving a soft fluctuant swelling.
Can get infected
Pathogenesis of radicular cyst?
Infection from pulp - proliferation of epi rests of malassez
Cyst fluid contains high conc of proteins - exert osmotic pressure
Cyst tissues release bone resorbing factors
Histopatho radicular cyst?
SSE lining - with time lining becomes thinner
Treatment radicular cyst?
Displace teeth, displace antrum
Enucleate and extract/RCT tooth
Who and where are Dentigerous cysts found?
Upto age 40. Young adults
Encloses crown of U/E tooth.
Attached to CEJ
L8, U3, L5
Symptoms Dentigerous cyst?
Radiographic fts dentigerous cysts?
Envelop crown, CEJ
Corticated, well defined
Resorb adj teeth
Histopathology of dentigerous cysts?
SSE lining, continuous with REE
Fibrous wall similar to radicular, but less inflammatory changes visible.
Fluid = clear yellow. Purulent if infected.
What other lesions may envelop the crown of a tooth?
Adenomatoid odontogenic cyst (anterior)
Lateral Periodontal cyst are positioned where?
Beside a tooth (vital), near crest of ridge.
can extend into the gingivae
Treatment of lateral periodontal cyst?
Enucleation. Tooth can be retained if healthy.
Sialo-odontogenic cyst occurs in anterior mandible. Histological findings?
Small glands in epi lining that are lined by mucous cells and secrete mucin.
Three things that help you differentiate a nasopalatine duct cyst from a large nasopalatine foramen?
Over 6mm, cyst more likely
Foramina are usually oval or irregular
Cyst tends to be more lucent having resorbed bone.
What times of primary bone cysts exist?
Aneurysmal bone cyst
Solitary bone cyst
What does a solitary bone cyst contain?
No epi lining
Or pale fluid.
What radiographic fts may help you decide solitary bone cyst?
Generally less well defined compared to odontogenic cysts.
Cavity arches up between the roots of teeth, usually without expansion