Dentigerous Cyst — ORE Part 1 MCQ
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Correct answer: C — Mandibular third molar
C. Mandibular third molar is correct. Dentigerous cysts arise from the follicle of an unerupted tooth and are most frequently associated with impacted mandibular third molars. This is therefore the best overall answer. B. Maxillary canine is a plausible distractor because dentigerous cysts may occur around impacted canines and this is a recognised common site; however, it is less frequent than the mandibular third molar. C. Mandibular second premolar can be involved, particularly in children, but is not the commonest site overall. D. Maxillary central incisors are uncommon associations, sometimes related to local developmental anomalies or supernumerary teeth. E. Mandibular first molars are usually erupted and are therefore rarely associated with a dentigerous cyst.
Reference: Lin H-P, Wang Y-P, Chen H-M, et al. A clinicopathological study of 338 dentigerous cysts. Journal of Oral Pathology & Medicine. 2013. https://pubmed.ncbi.nlm.nih.gov/23293505/