title: Fourth molar in mandible. Report of four cases and a review of the literature in Japan.
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D008297:Male; D008334:Mandible / Q000002:abnormalities; D008437:Maxilla / Q000002:abnormalities; D011859:Radiography; D014095:Tooth, Impacted / Q000000981:diagnostic imaging; D014096:Tooth, Supernumerary / Q000000981:diagnostic imaging / Q000453:epidemiology