I . !evelopmental
A. "!"#$"%&#IC
-. "dontogenic eratocyst
!entigerous cyst
&ruption cyst
2. %lobulomaxillary cyst
Swelling
As the cyst grows larger, expansion o buccal5 labial
cortical plate occurs.
In some cases lingual cortical plate expansion seen.
distension or bulging o the external bony surace.
As cyst increases in si6e , the periosteum is stimulated to
orm a layer o new bone, and it is this subperiosteal deposition
which alters the outline o the a7ected portion o the jaw and
produces enlargement
At early stage it is smooth, hard and painless
prominence
Consistency o swelling
4ercussion o tooth overlying cyst 8 dull or hollow
sound
!riting o adjacent tooth 4athological racture
In maxilla, may cause nasal obstruction,
recurrent sinusitis or epiphora. Impairment o sensation in
large cysts9 rare In edentulous jaw, instability o
dentures
due to swelling.
Clinical eat!es o cyst
:adicular cyst 8 non vital tooth 4eriodontal cyst9
any vital tooth !entigerous cyst9 unerupted 5impacted
Ra"iog!a#$ic eat!es
<ell de3ned round or oval area o radiolucency ,
circumscribed by a sharp radio opaque margin.
:ule out normal anatomic structure 4athology 8 gaint
cell lesion, myxoma and
ameloblastoma I"4A, occlusal or "4%
As#i!ation
Enla!ge%ent o cyst
+teps $he attraction o fuid into the cyst
cavity $he retention o the fuid within the cavity
$he production o a raised internal
hydrostatic pressure $he resorption o surrounding bone
with
increase in the si6e o the bony cavity
'. 0ural growth
-. =ydrostatic enlargement
c. +ecretion
