ch 15 Flashcards
What’s an odontogenic cyst?
cavity lined by odontogenic epithelium and filled with fluid
Where does the odontogenic epithelium come from?
Dental lamina (rests of serres)
What's a dentigerous cyst? How common is it? Where does it attach? Is it painful? What tooth is most common?
A unilocular cyst surrounding the crown of unerupted impacted tooth. Most common odontogenic cyst. CEJ. Not painful. 3rd molar.
What’s an eruption cyst?
Where does it appear?
Why does it happen?
What does it look like?
The same as dentigerous cyst but in soft tissue.
children younger than 10.
trauma from erupted tooth.
Blue bump on the gums.
What the odontogenic keratocyst? (keratocystic odontogenic tumor).
What recurrence rate?
what are they associated with?
Which direction does it grow?
What does it look like? (smaller vs larger)
Histology?
Similar to dentigerous cyst but not always around unerupted crowns.
30% recurrence rate.
Associated with a syndrome (gorlin syndrome).
anterior to posterior growth.
Small: unilocular Larger: multilocular.
Basal cell layer is palisaded (standing upright) and hyperchromatic (darker blue), Epithelium have wavy parakeratin (nucleated)
What is gorlin syndrome aka?
What is common with it? 4 things.
Nevoid Basal cell carcinoma syndrome. Multiple basal cell carcinomas Multiple odontogenic keratocysts calcification of falx cerebri Rib anomalies.
DON'T NEED TO KNOW!!!What is orthokeratinized odontogenic cyst? What age? How many lucules? Area it occurs? What is orthokeratin?
orthokeratinized lining and no basal palisade cyst. young adults. Unilocular Posterior mandible. No nuclei
Gingival cyst of the adult?
Where is it?
What does it look like?
The soft tissue counterpart of the lateral periodontal cyst.
Mandibular, premolar, canine.
Blue fluid filled bump on the gingiva, lateral root cyst.
Lateral periodontal cyst? (need to know this CPC)
What’s it similar to? but how’s it different?
Where does it occur?
What’s it look like xray?
How many locules?
development odontogenic cyst on the lateral root surface in between roots.
Gingival cyst of the adult, it’s intrabony.
Canine-premolar area.
radiolucent circle between canine premolar roots.
Multi-locular grapelike (botroid)
What’s a Calcifying odontogenic cyst? (Gorlin cyst).
Where’s it found?
What’s it look like Xray?
Calcifying cyst.
Incisor-Canine area.
Flecks of calcification in cyst.
Glandular odontogenic cyst appearance?
Recurrence?
Multilocular Anterior mandible crosses the midline.
30%.
Buccal bifurcation cyst appearance?
What age is most likely?
Where is it?
root apex is pushed towards the lingual because the cyst occurs on the buccal.
10 years old.
buccal bifurcation of molars.
Where does carcinoma arise from? what type of tissue?
epithelium.
What’s the only epithelium within bone?
odontogenic stuff.
What does carcinoma arise from within jaws??
odontogenic cysts
What do odontogenic carcinoma’s look like radiographically?
irregular xray border
Ameloblastoma?
Three different types?
Most common clinically significant odontogenic tumor.
- conventional solid or multilocular (85%)
- Unicystic 15%
- Peripheral 1%
When do ameloblastoma's occur? Location? How to find it and is it symptomatic? Xray appearance? What happens to roots? What happens to buccal lingual cortical bone? What's different about the Desmoplastic type? Histology? Treatment?
30-70’s.
85% in mandible molar ramus.
Asymptomatic, xray
Multilocular, soap bubble or honeycomb.
Roots resorb.
buccal lingual cortical expansion.
desmoplastic more likely anterior maxilla.
Histo: palisading, hyperchromatic basal layer, “red, white and blue pattern”, Reverse polarity.
Treatment: resection of the bone 1.5 cm beyond the border.
Multilocular radiolucency differential?
Ameloblastoma.
Odontogenic keratocyst.
Central giant cell granuloma.
If an impacted tooth is present in multilocular radiolucency what’s the differential?
Dentigerous cyst.
Ameloblastoma.
Odontogenic keratocyst.
Central giant cell granuloma.
DON’T NEED TO KNOW!!!Peripheral ameloblastoma appearance?
Treatment, recurrence.
pink bump on the gums.
Excision, no recurrence.
DON’T NEED TO KNOW!!!What’s the difference in malignant ameloblastoma and Ameloblastic Carcinoma?
Malignant: metastatic in another part of the body.
Carcinoma: malignant
DON’T NEED TO KNOW!!!Ameloblastic carcinoma xray appearance?
ill-defined margins and cortical destruction.
Adenomatoid odontogenic tumor location?
Gender?
tooth involved?
Xray appearance?
anterior maxilla.
Female.
unerupted canine.
unilocular RL around unerupted tooth with snowflake calcifications.
Calcifying epithelial odontogenic Tumor (Pindborg Tumor) appearance?
Xray appearance?
Histology and test used (color shown)?
What are the ring calcifications around the histology?
contains calcified structures of varying size and density. (Driven Snow).
Well define benign looking tumor.
Amyloid like material tested by Congo Red becomes apple green.
Liesegang rings.
Differential for mixed radiolucency/opacity? calcifications
COC
AOT
AFO
CEOT
DON’T NEED TO KNOW!!!What’s the malignant counterpart of ameloblastic fibroma?
Ameloblastic fibrosarcoma
What’s the most common odontogenic tumor?
Odontoma
Odontoma appearance.
Age?
Compound?
Looks like multiple small teeth.
15 years old.
Compound: multiple small teeth.
Complex: big mass that kinda looks like a tooth.
