ients Lateral periodontal cyst
· Developmental cyst that form beside a vital tooth
· Usually seen ny chance in routine radiographs
· Resemble other odontogenic cysts radiographically,apart from position near the crest of the ridge
· Cause no symptoms but can erode through the bone to extend in to th gingiva
· Microscopically,the lining is squamous or cuboidal epithelium,frequently only one or two cells thick,sometimes with focal thickenings
· Some cells may have clear cytoplasm
· Respond to enucleation
· The relate tooth can be retained if healthy
Sialo-odontogenic cyst
· Also rare and with many features in common with botryoid odontogenic cysts
· Frequently multi locular
· Microscopically,pools of mucin and mucous cells present in the epithelium
· Has a strong tendancy to recur
· Should be consevatively excised
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