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ameloblastoma tx
surgical resection w margin
recurrence - no CT capsule
malignant transformation - <1% ameloblastic carcinoma
ameloblastoma histology
ameloblast cells
stellate reticulum
fibrous tissue stroma
AOT histology
distinctive with patchy calcification
duct like structure/rosette/sheets - epithelial
fibrous capsule - removal simple and low recurrence rate
internal calcifications
cyst vs incisive fossa
<6mm assume incisive fossa
6-10mm consider monitoring
>10mm suspect cyst
odontogenic myxoma histology
loose myxoid tissue with stellate cells
may contain islands of inactive odontogenic epithelium
- vital but don’t divide (inert)
no capsule - locally invasive and infiltrate, harder to surgically remove, recurrence high
dentigerous cyst histology
thin NKSSE
dentigerous cyst origin
from E organ (REE)
dentigerous cyst vs follicle
consider cyst if >4mm/asymmetrical
assume cyst if >10mm
eruption cyst origin
ST
rests of serres
radicular cyst origin
ep rests of malassez
radicular cyst vs granuloma
diameter >15mm 2/3 will be a cyst
radicular cyst histology
NKSSE lining - often incomplete - can get ulceration/hyperplasia fibrous CT vascular capsule inflammatory infiltrate in capsule cholesterol clefts hyaline/rushton bodies mucous metaplasia
gingival cysts origin
rests of serres
OK origin
from cell rests of serres (remnants of dental lamina)
histology OK
parakeratosis
corrugated wavy epithelium
no rete pegs
basal palisading
carnoys solution
acetic acid
chloroform
ethanol
fibrous dysplasia xray
margins blend
orange peel
what does ossifying fibroma have?
capsule
complications Pagets
infections
pathological fracture
(osteosarcoma)
osteopetrosis
lack of OC activity
bone v hard
marrow obliteration
cherubism
vascular GC lesions
regress after puberty
bilateral firm painless swelling
cemento-osseous dysplasias types
periapical OD
focal OD
florid OD
cemento-osseous dysplasias xray
radiolucency with developing radiopacity
can still see PDL space between root and lesion
poorly defined
cemento-osseous dysplasias problems
increased risk of infections
PTH
release Ca from bones
hyperparathyroidism
generalised osteoporosis
osteitis fibrosa cystica (brown tumours)
metastatic calcification (kidney)
primary hyperparathyroidism
gland
secondary hyperparathyroidism
hypocalcaemia e.g. due to vit D deficiency
tertiary hyperparathyroidism
prolonged secondary results in hyperplasia
gardner syndrome
multiple osteomas
colon polyps
ST torso growths - dermoid cysts
osteosarcoma xray
sunray
measures of OB activity
serum ALP
osteocalcin
measures of OC activity
collagen degradation urine and blood
osteitis fibrosa cystica
characteristic cystic changes in bones due to prolonged unchecked hyperparathyroidism
generalised osteoporosis
focal osteolytic lesions
GC lesion - brown tumour
brown tumour
area of significant resorption GT fills spaces where bone was lots of MN GCs often bleeding into lesion - rbcs break down - haemosidrin - brown no capsule
