Paradental cyst / histopathology, clinical and radiographic features

Paradental cyst 

A cyst of odontogenic origin commonly located subgingivaly on buccal aspect of  an erupted mandibular molar (bifurcation cyst) or the distal surface of a partially erupted mandibular third molar.

▪ Also known as Criag cyst.

▪ Buccal bifurcation cyst.

Clinical features

▪ Cyst is inflamed but tooth is vital is present at bifurcation area usually associated with mandibular molar which has cervical enamel projection.

▪ It can also be present distally of third molar which is anatomically impeded by ascending ramus. 

▪ Sometimes paradental cyst give rise to Garres osteomyelitis. 

Radiographic features

▪ Buccal bifurcation cyst cannot be visible on routine radiograph.

▪ But cyst present distally of third molar can be visible on periapical panoramic radiograph.

Histopathology

▪ Epithelium is non keratinized squamous eptihelium

▪ Usually infiltrated by neutrophils

▪ Connective tissue is chronically inflamed

▪ It has resemblance with dentigerous cyst

Treatment

▪ Usually treated by surgical enucleation. 

▪ Molar is often extracted during surgery.

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