Exam 2-Odontogenic Cysts Flashcards
Which two odontogenic cysts are considered inflammatory? What are the rest considered?
1.Radicular cyst 2.buccal bifurcation cyst…the rest are developmental
What is a cyst arising from degeneration of enamel organ prior to tooth formation aborts odontogenesis resulting in radiolucency in place of a missing tooth? What is the most common location?
primordial cyst….mandibular 3rd molar
What is a cyst resulting from separation of the follicle from around the crown of developing tooth? Where are the 2 most common locations?
Denti-gerous cyst (follicular cyst)…mand 3rd molars, maxillary canines
Radiographic findings of a WHAT?: Well circumscribed pericoronal radiolucency. From CEJ around crown.
Denti-gerous Cyst
The hits of a dentigerous cyst is stratified squamous epithelium WITHOUT __________
keratinization
A. _______ cyst – a dentigerous cyst that gets pushed into oral cavity by erupting tooth, may treat with decompression so tooth can erupt
Eruption
What is the neoplastic potential for a dentigerous cyst?
Neoplastic potential – Exceedingly rare
What is the Most common of all odontogenic cysts??
Apical Periodontal cyst
________ cyst arises from cystic degeneration of rests of Malassez in PDL. Teeth vital, ↑↑ MdCu-Bi.
lateral periodontal
Lateral Periodontal cyst arises from cystic degeneration of __________ in PDL. Teeth vital, WHICH TEETH ARE MOST AFFECTED??
rests of Malassez…mand canines and PM
A variant to the lateral periodontal cyst is the _______ odontogenic cyst – polycystic, multilocular, may recur after removal.
Bo-try-oid
_______ (dental lamina cyst) – Soft tissue cysts on gingiva or alveolar ridge from degenerating dental lamina…Very common, Congenital or early life, Small yellowish elevations…WHAT IS THE TX?
Newborn…no Tx
Where are adult gingival cysts most common and what is the treatment?
mandibular canines and PM..excision
What is a developmental cyst from dental lamina? How much of these are parakeritinized and how much are orthokeratinized?
Odontogenic Keratocyst….90% para, 10% ortho
When are parakeratinized odonntogenic keratocysts most common? Which arch do they occur more in?
6-7 decades…2:1 mandibular
How many parakeratinized odontogenic keratocysts recur after excision?
1/3
WTF? About ___% of patients with keratocyst have, almost all multiple OKCs
5%
Watch out because the 5% of patients with keratocyst have Basal cell nevus-______ syndrome, which is an autosomal dominant malignancy…
Basal cell nevus-bifid rib syndrome
Keratocysts known for: 1. Clinical ___________ 2. Recurrence after removal… Association with basal cell nevus-_______ syndrome
aggressiveness… Recurrence..bifid rib
Which type of keratocyst is Smaller, less aggressive, minimal recurrence, not associated with syndrome?
orthokeratinized odontogenic cysts
VIII. Calcifying odontogenic cyst (aka ______ Cyst)
Gorlin
Which cyst?Any age, ↑ Md, maybe associated with unerupted teeth or odontomas… Asymptomatic, rarely expansion, occur extraosseously
Calcifying odontogenic cyst (aka Gorlin Cyst)
Do goblin cysts have recurrence?
low recurrence
Woah, these are found in the mandible, can be large and have a 30-50 % recurrence rate…(hint: histo-Cyst showing glandular differentiation (mucus cells, columnar epithelium with cilia, lumina)
Glandular odontogenic cyst
Inflammatory cyst occurring on buccal of erupting tooth… 2names…
Buccal Bifurcation cyst/ paradental cysts
Since Buccal Bifurcation cyst/ paradental cysts occur on erupting teeth, children are most affected…but which tooth is most common?
mand 1st molar
Do you have to extract the tooth if you notice a Buccal Bifurcation cyst/ paradental cyst?
nope
