[Morphological studies on the roots of Japanese mandibular second molars].
D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D005260:Female; D005671:Fused Teeth / Q000473:pathology; D006801:Humans; D007564:Japan; D008297:Male; D008875:Middle Aged; D008963:Molar / Q000002:abnormalities / Q000033:anatomy & histology*; D012737:Sex Factors; D014092:Tooth Root / Q000002:abnormalities / Q000033:anatomy & histology*