Classification of cyst of the jaws
· Gingival cysts of infants (epstain pearls)
· Odontogenic kerato cyst(primodial cyst)
· Orthokeratinized odontogenic cyst
· Dentigerous (follicular cyst)
· Eruption cyst
· Lateral periodontal cyst
· Gingival cyst of adults
· Glandular odontogenic;sialoodontogenic cyst
· Nasopalatine duct cyst
· Nasolabial cyst
Inflammatory odontogenic cyst
Key features of jaw cysts
· Form sharply defined radiolucencies with smooth borders.
· Fluid may be aspirated and thin walled cysts may be trans illuminated.
· Grow slowly,displacing rather than resorbing teeth.
· Symptoms unless infected and are frequently chance radiographic findings.
· Rarely large enough to cause pathological fracture.
· Form compressible and fluctuent swellings if extending in to soft tissues.
· Appear bluish when close to the mucosal surface
Major factors in the pathogenisis of the cyst formation
· proliferation of epithelial lining and fibrous capsule
· hydrostatic pressure of cystic fluid
· resorption of surrounding bone.