what is a fibrosseous lesion Flashcards
Lesions where the normal bone is replaced by fibrous tissue in which abnormal bone is laid down. (28 cards)
what is a fibrosseous lesion
Lesions where the normal bone is replaced by fibrous tissue in which abnormal bone is laid down.
what is an ossifying fibroma
Benign neoplasm composed of fibrous tissue
which forms spicules, islands or cementicles
of bone
where is the most common site for an ossifying fibroma
premolar or molar region
what is the main type of bone in an OF
Woven bone - amorphous patterns
what does an OF look like radio graphically?
a radiolucent, well demarcated, corticated lesion. often little speckles of bone
what is the management of an OF?
CONSERVATIVE enucleation
resection if severe
do OF recur?
yes but low recurrence
what type of lesion is FD
a developmental lesion - tends to occur in developing children
how does FD present clinically?
Painless smooth enlargement/swellings
what is the most common site of FD
posterior maxilla
what is the most common site of OF
posterior mandible
how does FD appear radiologically
a poorly demarcated radiopacity
looks like frosted glass
will blend in with normal bone - cant tell where it starts or ends
what bones does FD affect
can affect ANY bone in the body. tends to be longer bones
what are the 2 types of FD
Monostotic
Polyostotic
what syndrome is polyostotic FD associated with?
McCune - Albrights Syndrome
what is the management of FD
Leave as growth stabilises over time.
ideally wait until after growth spurt and then do any debulking and contouring of bone
if really large can surigcally remove but try to avoid this
then ortho/orthognathic surgery later to correct any malocclusion
is there risk of malignant transformation in FD
yes, usually to osteosarcoma but risk is LOW
what are the main differences between FD and OF
FD Poorly defined lesion - frosted glass appearance No margin Females = males Often posterior maxilla
OF Well defined lesion - could draw around outside Clear margin Females > males Often posterior mandible
what type of lesion is OD
a reactive lesion
who does OD usually affect?
often middle aged afro Caribbeans/east asians
what are the 3 types of OD
Focal - single lesions usually posterior mandible
PA - multiple lesions usually at apex of anterior teeth. in early stages when fibrous can look like PA granulomas but occurs on all teeth together
Florid - multiple lesions throughout the jaws
how does OD affect general dental treatment
because can become v sclerotic you can get a decrease in blood supply so if you get and infection in the tooth then you get poor wound healing
what is pagets
a rare disorder affecting all bones where bone turnover is increased and no longer related to functional demands
what is a difference between FD and Pagets
Pagets tends to affect the WHOLE bone whereas FD can just affect part of the bone
