Lateral periodontal cyst

Lateral periodontal cyst oral pathology

1. Lateral periodontal cyst By: Elif

2. It is a developmental odontogenic cyst It is an uncommon cyst. It is a slow growing , non expansible cyst. It is developed from one or more layers of rests of dental lamina. It contains an embryonic lining consists of 1 or 3 layers of cuboidal cells. Location:it occurs on lateral periodontal area Origin: it arises from cystic degeneration of clear cells of dental lamina These cysts appear to arise in intimate association with lateral root surface of erupted tooth, most commonly seen in mandibular bicuspid area(premolar region).

3. Etiology and pathogenesis Studied by Standish and Shafer’s They proposed 4 theories for lateral periodontal cyst development

4. First theory It says that it is initially developed as dentigerous cyst. It is present on the lateral surface of the crown when tooth is unerupted.

5. Second theory Says that cyst develops from Poliferation of developed From rest of Malasses in PDL The stimulation is unknown

6. Third theory Syas that it is a primordial cyst of supernumerary tooth. It is common in mandibular bicuspid region.

7. Fourth theory It is given by wysocki It is the more appropriate theory It says that Cyst is developed from proliferation and cystic transformation of rests of dental lamina.

8. Clinical features Chiefly present in adults (22 to 85 years) Predilection of occurrence in males than in females Location : mandibular bicuspid/cuspid (67%) and in incisor area(33%). It is normally asymptomatic,it can be discovered during routine radiographic examination. If cyst becomes infectious it resembles lateral periodontal abseccess The adjacent tooth is vital

9. Radiographic features Periapical radiography disclosses the lateral periodontal cyst as radiolucent area The lesion is less Than 1cm These cysts are surrounded by layer of sclerotic bone Botryoid cysts apperbut are polysctic and multilocular

10. Botryoid odontogenic cysts These are found by Weather and Weldn These appear as cluster of grapes Polycystic and multilocular lesions.

11. Histological features Lining epithelium is thin ,non keratinized ,resembles reduced enamel epithelium ,contains cuboidal cells Lining cells are vacuolated,glycogenic rich cytoplasm is present Botryoid cyst is thickened plaque of poliferated cells which are wjorled appearance The sujacent connective tissue epithelium exhibit zone of hyalinizationof thick fibrous non inflammatory cyst cellwall

12. Treatment and prognosis Lesions are unilocular in radiographic examination these are treated with surgical enucleation Botryoid cyst will keep on increased risk of reoccurrance ,so regular follow up should be present.