A dentigerous cyst is a developmental cyst of odontogenic origin which develops around the fully-formed crown of an unerupted tooth.
These are discovered on routine radiographs, when a tooth has failed to erupt, a tooth is missing, teeth are tilted or are out of alignment.
These cysts are mostly found in mandibular third molar region followed by maxillary third molar region,maxillary canine and mandibular second premolar.
Radiographically, it is very difficult to differentiate between a normal enlarged pericoronal space and a cyst; if the width of this space has reached more than 2.5mm [and has an irregular outline] it is probably a dentigerous cyst.
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This may be classified as central, lateral and circumferential type Impacted supernumerary teeth often develop dentigerous cysts.
They are the most aggressive of the cysts due to greater tendency than other jaw cysts to produce root resorption of adjacent teeth. Histologically, it is composed of a thin connective tissue wall with a thin layer of stratified squamous epithelium lining.
° Jasvir Kaur / Neeraj Mahajan / Amanpreet Singh Deepika Kapoor