The lateral periodontal cyst is an uncommon, slow-growing odontogenic cyst that develops from dental lamina rests. It typically occurs on the lateral aspect of teeth in the mandibular premolar region. The cyst forms due to proliferation and cystic degeneration of dental lamina rests. Radiographically, it appears as a well-defined radiolucent lesion less than 1cm in size, surrounded by sclerotic bone. Histologically, the cyst lining resembles reduced enamel epithelium and contains cuboidal cells. Surgical enucleation is usually sufficient treatment for unilocular lateral periodontal cysts, while botryoid cysts have a higher risk of recurrence due to their multicystic nature.

2. Lateral periodontal cyst
• By: Elif

3. • 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).

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

5. 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.

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

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

8. 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.

9. 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

10. •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

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

12. •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

13. 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.