features: As the cyst expands it causes erosion of the floor
of the maxillary sinus. As soon as it enters the maxillary
antrum the expansion starts to occur a little faster because there
is space available for expansion. When it reaches a size
wherein it fills up the whole antrum, it can erode the anterior
wall of the maxilla (in the canine fossa area). This is the
weakest portion of the maxillay bone. When it erodes the
anterior wall of the maxilla it could cause expansion of
the maxilla which could be seen as a swelling in the cheek
area. On palpation egg shell crackling may be felt in the
anterior wall of the maxilla over the canine fossa.
There will be associated tenderness.
Tapping the teeth with a tongue
depressor will cause tingling sensation because of involvement of
the root of the teeth.
In the video clip
shown below you will be seeing a dental cyst which has eroded the
anterior wall of maxilla. The cyst was approached
via Caldwell Luc procedure sublabially. On incising the
muco perichondrium, yellowish fluid started pouring out of the
defect in the anterior wall of the maxilla. The contents of
the maxillay sinus along with its mucosal lining was curretted
out. Inferior meatal antrostomy was performed.
Ointment impregnated gauze was used to pack the
antrum. The wound was closed with