A cyst that forms around the crown of an unerupted tooth is called which?

A cyst that forms around the crown of an unerupted tooth is called which?

• A. Radicular cyst
• B. Odontogenic keratocyst
• C. Dentigerous cyst
• D. Paradental cyst

Answer: (C)

A cyst that forms around the crown of an unerupted tooth is a dentigerous cyst. It develops when fluid accumulates between the reduced enamel epithelium and the crown, creating a unilocular radiolucent space that surrounds the tooth crown and is usually attached at the cemento-enamel junction. This contrasts with radicular cysts, which occur at the root tip of a nonvital tooth due to inflammation; odontogenic keratocysts, which arise from rests of dental lamina and can occur in various jaw locations without specifically encasing a crown; and paradental cysts, which form on the side of a partially erupted tooth, typically with an inflammatory origin near the mandibular third molar.

A cyst that forms around the crown of an unerupted tooth is a dentigerous cyst. It develops when fluid accumulates between the reduced enamel epithelium and the crown, creating a unilocular radiolucent space that surrounds the tooth crown and is usually attached at the cemento-enamel junction. This contrasts with radicular cysts, which occur at the root tip of a nonvital tooth due to inflammation; odontogenic keratocysts, which arise from rests of dental lamina and can occur in various jaw locations without specifically encasing a crown; and paradental cysts, which form on the side of a partially erupted tooth, typically with an inflammatory origin near the mandibular third molar.