Odontome simulates a fourth root.
Hertl
N
N
D000328:Adult; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008963:Molar / Q000002:abnormalities* / Q000000981:diagnostic imaging; D011859:Radiography; D014092:Tooth Root / Q000002:abnormalities* / Q000000981:diagnostic imaging