A dentigerous cyst is a type of cyst that forms around the crown of an unerupted tooth. It is commonly found in the mandible or maxilla. These cysts grow slowly and are often asymptomatic until they become large enough to cause pain, swelling, or infection. There are several synonyms for dentigerous cyst, including follicular cyst, periapical cyst, odontogenic cyst, and radicular cyst. These terms are often used interchangeably by dental professionals and describe the same type of cyst that arises from the tooth's developing tissues. Dentigerous cysts require treatment to prevent further damage to the surrounding structures and tooth development.