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Odontogenic Keratocyst (primordial cyst)

Odontogenic Keratocyst (primordial cyst). Odontogenic Keratocyst.

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Odontogenic Keratocyst (primordial cyst)

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  1. Odontogenic Keratocyst (primordial cyst)

  2. Odontogenic Keratocyst • -Peak incidence is high in 2nd & 3rd decades -70-80% of Od.K. occurs in the mandible -50% of all cases occur in the 3rd molar region & ascending ramus -Keratocyst enlarge predominantly in anteroposterior direction -Multiple Od.K. are associated with basal cell naevus syndrome(Gorlin-Goltz syndrome) -Tendency to recur after surgical treatment(3 to over 60%)

  3. POSSIBLE FACTORS INVOLVED IN EXPANSION OF ODONTOGENIC KERATOCYST 1-Active epithelial growth 2-Cellular activity in the connective tissue capsule 3-Production of bone resorbing factor

  4. GINGIVAL CYST adult newborn (Bohn’s nodules)

  5. Most disappear spontaneously by 3 months of age. They arise from remnants of the dental lamina which proliferate to form small keratinizing cysts.

  6. LATERAL PERIODONTALCYST DEVELOPMENTAL

  7. distinguished from a lateral radicular cyst associated with a non-vital tooth and from an odontogenic keratocyst arising alongside the root of a tooth.

  8. Histologically, the cyst is lined by thin non-keratinized squamous or cuboidal epithelium resembling reduced enamel epithelium, with focal, plaque-like thickenings.

  9. GLANDULARODONTOGENICCYST is a rare, developmental odontogenic cyst. Most have occurred in the anterior part of the mandible where they present as a slow-growing, painless unilocular or multilocular radiolucency.

  10. the cyst is lined by epithelium of varying thickness with a superficial layer of columnar or cuboidal cells and occasional mucous cells. Crypts or small cyst-like spaces are present within the thickness of the epithelium and the lining has a distinctly glandular structure.

  11. PARADENTAL CYST arises alongside a partly erupted third molar involved by pericoronitis. The reported cases have occurred in the mandible and most have been buccally or distobuccally placed. Typically, the teeth associated with these cysts show an enamel spur extending from the buccal cervical margin to the root furcation .

  12. NASOPALATINEDUCT CYST 5-10%

  13. NASOLABIAL CYST arises in the soft tissue of the upper lip just below the ala of the nose. Although arising in soft tissue, it is traditionally grouped with the jaw cysts previously regarded as fissural lesions .

  14. lined by pseudostratified columnar epithelium but stratified squamous epithelium, mucous cells, and ciliated cells may also be present. The aetiology of the cyst is unknown but it has been suggested that it arises from remnants of the lower part of the embryonic nasolacrimal duct.

  15. GLOBULOMAXILLARYCYST is a rare lesion occurring between the roots of the maxillary permanent lateral incisor and canine teeth. Classically, it presents as an inverted pear-shaped radiolucency.

  16. MEDIANPALATALCYST

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