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DEFINITION:Cysts are pathological fluid-filled cavities lined by
epithelium
• Cysts are the most common cause of chronic swellings of the jaws. They are more common in jaws than in any other bone because of many rests of odontogenic epithelium remaining in the tissues.
CYSTS OF JAWS
ODONTOGENIC KERATOCYST(OKC)
DENTIGEROUS cyst(follicular cyst)
Eruption cyst
Lateral periodontal cyst
Gingival cysts of Adults
Gingival cysts of Infants
ODONTOGENIC CYSTS
Nasopalatine duct cysts
Nasolabial duct cyst
NON-ODONTOGENIC CYSTS
RADICULAR CYSTS Residual Lateral
INFLAMMATORY ODONTOGENIC CYSTS
DEVELOPMENTALODONTOGENIC
CYSTS
Pathology: • Odontogenic Keratocyst is derived from
remnants of dental lamina
Dental lamina:• The bands of epithelium that originates from oral
epithelium and remain in the tissues after inducing tooth development
ODONTOGENIC KERATOCYST(OKC)
• Peak incidence during second or third decade of life
• Mandible is usually affected, primarily posterior body of mandible and ramus area
• Unilocular or Multilocular• Multilocular OKC’s are consistent features of
nevoid basal cell carcinoma syndrome( Gorlin Goltz Syndrome )
• Exhibits 25% to 60% of recurrence
CLINICAL FEATURES OF ODONTOGENIC KERATOCYST
• Odontogenic Keratocyst appear as well-defined radiolucent areas with a more or less rounded margins
• Some are Unilocular, but majority are Multiloculated
RADIOGRAPHIC FEATURES
Unilocular and small Multilocular cysts can be treated by Enucleation and bony cavity curetted
Surgical resection and reconstruction with a bone graft
TREATMENT
• An Odontogenic cyst that surrounds the crown of an impacted tooth.
It is usually derived
from Reduced enamel
Epithelium (residual
Epithelium that
surrounds the crown of
tooth after enamel
formation is complete)
DENTIGEROUS CYST
• Usually remain asymptomatic, but produce swelling or pain ,If it is large or INFLAMMED
• More common in males as compared to females
RADIOGRAPHIC APPEARANCE Appear as well defined radiolucency surrounding the
crown of an unerupted tooth In mandible, cyst may displace the associated tooth
inferiorly into ascending ramus
In maxilla, it displaces associated tooth posteriorly
CLINICAL FEATURES
RADIOGRAPHIC APPEARANCE
• Surgical ENUCLEATION• In case of a molar teeth, the associated tooth is
usually extracted at the time when cyst is enucleated
• In case of maxillary CUSPID tooth, cyst may be excised by MARSUPILIZATION (surgical curettage of cyst by creating a surgical window in cyst area)
TREATMENT
• An Odontogenic cyst that surrounds a tooth’s crown that has erupted through bone but not soft tissue and is clinically visible as a soft fluctuant mass on the alveolar ridge
ERUPTION CYST
CLINICAL FEATURES: Affects children and involve deciduous teeth Cyst lies superficially in gingiva overlying the unerupted
tooth Appears as a soft, rounded, bluish swelling
MANAGEMENT:• Cyst roof may be removed to allow the tooth to
erupt, but most eruption cysts burst spontaneously and require no treatment
CLINICAL FEATURES AND TREATMENT
Eruption cyst ( bluish appearance)