<prompt> True about Dentigerous cyst:Arises in relation to unerupted teethIt most commonly encroaches maxillary antrumMandibular third molar is common siteCommon in mandible  <response>: Ans. a Arises in relation to unerupted teeth, c Mandibular third molar is common site, d Common in mandibleRef: Robbins 9th734; Manipal Surgery 4th292-93; Harsh mohan 7th511-12Dentigerous cyst is defined as a cyst that originates around the crown of an unerupted tooth and is thought to be the result of fluid accumulation between the developing tooth and the dental follicle.Radiographically, these are unilocular lesions most often associated with impacted third molar wisdom teeth. Histologically, they are lined by a thin layer of stratified squamous epithelium. Often, there is a dense chronic inflammatory cell infiltrate in the connective tissue stroma.Complete removal of the lesion is curative. 