title: Unusual root anatomy of mandibular first molars.
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D003786:Dental Pulp Cavity / Q000002:abnormalities* / Q000473:pathology; D005260:Female; D006801:Humans; D008297:Male; D008963:Molar / Q000002:abnormalities* / Q000473:pathology; D014092:Tooth Root / Q000473:pathology