title: [Variations of the root of the mandibular second permanent molar and its clinical significance].
mesh_terms: D005260:Female; D006801:Humans; D008297:Male; D008334:Mandible; D008963:Molar / Q000002:abnormalities* / Q000033:anatomy & histology / Q000473:pathology; D014092:Tooth Root / Q000002:abnormalities* / Q000033:anatomy & histology / Q000473:pathology