title: [Observation of the process of endodontic treatment, with special reference to the x-ray images of apical abnormalities].
mesh_terms: D006801:Humans; D010518:Periodontitis / Q000000981:diagnostic imaging*; D011859:Radiography; D012390:Root Canal Therapy; D014092:Tooth Root / Q000002:abnormalities / Q000000981:diagnostic imaging*