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Dr. Shahzadi Tayyaba Hashmi
CYSTS OF JAWS Dr. Shahzadi Tayyaba Hashmi
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CYSTS OF JAWS 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.
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ODONTOGENIC CYSTS DENTIGEROUS cyst(follicular cyst)
ODONTOGENIC KERATOCYST(OKC) DENTIGEROUS cyst(follicular cyst) Eruption cyst Lateral periodontal cyst Gingival cysts of Adults Gingival cysts of Infants
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NON-ODONTOGENIC CYSTS
Nasopalatine duct cysts Nasolabial duct cyst
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INFLAMMATORY ODONTOGENIC CYSTS
RADICULAR CYSTS Residual Lateral
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DEVELOPMENTAL ODONTOGENIC CYSTS
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ODONTOGENIC KERATOCYST (OKC)
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
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CLINICAL FEATURES OF ODONTOGENIC KERATOCYST
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
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RADIOGRAPHIC FEATURES
Odontogenic Keratocyst appear as well-defined radiolucent areas with a more or less rounded margins Some are Unilocular, but majority are Multiloculated
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TREATMENT Unilocular and small Multilocular cysts can be treated by Enucleation and bony cavity curetted Surgical resection and reconstruction with a bone graft
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DENTIGEROUS CYST It is usually derived from Reduced enamel
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)
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CLINICAL FEATURES 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
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RADIOGRAPHIC APPEARANCE
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TREATMENT 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)
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ERUPTION CYST 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
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CLINICAL FEATURES AND TREATMENT
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
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Eruption cyst ( bluish appearance)
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