A well-defined unilocular radiolucency around the crown of an unerupted tooth within bone is most likely a(n):

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A dentigerous cyst is a well-defined unilocular radiolucency around the crown of an unerupted tooth within bone. Radicular cysts form from a necrotic pulp and are usually associated with the root of a non-vital tooth, eruption cysts occur in soft tissues rather than bone, and periodontal cysts are typically located near the roots of vital teeth.

A Well-Defined Unilocular Radiolucency Around the Crown of an Unerupted