title: Fourth molar obscured by "ghost image".
mesh_terms: D003951:Diagnostic Errors; D006801:Humans; D008963:Molar / Q000002:abnormalities; D011859:Radiography; D014096:Tooth, Supernumerary / Q000000981:diagnostic imaging*; D014097:Tooth, Unerupted / Q000000981:diagnostic imaging*