odontogenic tumors Flashcards
what is in the bell stage of tooth development
dental lamina, enamel organ, dental papilla, dental follicle
cells in enamel organ
ameloblasts, enamel
cells in dental papilla
odontoblasts, dentin, pulp
cells in dental follicle
cementoblasts, cementum, pdl, alv bone
where can odontogenic tissues come from
odontogenic epithelium, ectomesenchyme, or mesenchyme and ectomesenchyme
where are odontogenic tumors located
in areas where teeth can form, most are central
t/f most odontogenic tumors are benign
true, grow from months to years, grow slowly
t/f most odonotgenic tumors are well circumscribed with a corticated border
true, but some are radiolucent, radiopaque, or mixed
radiolucent odonto tumors
ameloblastoma, ameloblastic fibroma, cental odotogenic fibroma, odontogenic myxoma
ameloblastomas are located where
molar/ramus area of mand
ameloblastoma
benign tumor of ameloblasts that does NOT produce enamel
t/f. ameloblastomas are slowly growing and locally aggressive
true
classic signs for ameloblastoma
soap bubble (multilocular, round septations) significant expansion
microscopically, ameloblastomas resemble
the enamel organ, you still see stellate reticulum and ameloblasts
tx of ameloblastoma
removal, including 1-2cm of surrounding bone
can recur, it infiltrates the bone
peripheral ameloblastoma tx
cut it off, its in the soft tissue, so you can get around it
ameloblastic fibroma consists of
odontogenic epithelium and ectomesenchyme (CT)
tx of ameloblastic fibroma
enucleation/curettage with good prognosis
what age does ameloblastic fibroma effect
under 20 (1st/2nd decade)
where is an ameloblastic fibrma usually
post mandible
odontogenic fibroma consists of
ectomesenchyme (dental follicle)
radiographic appearance of odontogenic fibroma
radiolucent, corticated, well defined
tx of odontogenic fibroma
conservative surgical removal - enucleation/curettage
odontogenic myxoma has what type of radiographic appearance
honeycomb/tennis racket appearance
t/f odontogenic myxoma infiltrates into bone
true, has a goopy texture so it seeps into bone
tx of odontogenic myxoma
remove including surrounding bone
key difference between ameloblastoma and myxoma
myxomas have straight septations and ameloblastomas have more rounded
multilocular odontogenic cysts/tumors
OKC
ameloblastomas
myxomas
which tumor is ALWAYS mixed rl-ro
ameloblastic fibro-odontoma
2/3 tumor
adenomatoid odontogenic tumor
what does the 2/3rds mean in an adenomatoid odontogenic tumor
2/3rd of the time associated with
females under 20
ant max
unerupted tooth
tx of adenomatoid odontogenic tumor
easily excised, no recurrence
t/f calcifying epithelial odontogenic tumor may produce mineralizations
true
ameloblastic fibro-odontoma is always under what age
20
radiopaque lesions
odontomas and cementoblastomas
t/f odontomas are tumors
false. more of a hamartoma because they STOP GROWING, not persistent and progressive
neoplasm
new growth of abnormal tissue
benign
localized, persistent and progressive
malignant
cancer, invades and metastasizes
teratoma
neoplasm that arises from stem cells
hamartoma
overgrowth of mature cells that normally occur in the affected part, disorganized
choristoma
overgrowth of mature cells that occur other than the site which it is normally located (bone on tongue)
what two overgrowths of tissue stop growing when normal tissue stops growing
choristoma and hamartoma
key radiographic finding in odontomas
radiopaque area surrounded by radiolucent line surrounded by radiopaque line
2 types of odontomas
compound (multiple, tooth-like)
complex (does not look like teeth)
where are complex odontomas usually found
post mand
odontoma spectrum of development
ameloblastic fibroma -> ameloblastic fibro-odontoma -> odontoma
tx of odontomas
remove
cementoblastoma
benign neoplasm of cementoblasts
usually pain and swelling
radiographic appearance of cementoblastoma
fused to tooth root and causes partial root resorption
tx of cementoblastoma
remove lesion and tooth
OR remove lesion and endo
