Three-rooted lower first permanent molars in Hong Kong Chinese.
D044466:Asian People; D001641:Bicuspid / Q000002:abnormalities* / Q000000981:diagnostic imaging / Q000473:pathology; D002681:China / Q000208:ethnology; D005260:Female; D006723:Hong Kong; D006801:Humans; D008297:Male; D011859:Radiography; D012737:Sex Factors; D014092:Tooth Root / Q000002:abnormalities* / Q000000981:diagnostic imaging / Q000473:pathology