title: [Developments in dentistry in the twentieth century 9. Periodontology].
mesh_terms: D003748:Dental Equipment / Q000266:history; D003762:Dental Instruments / Q000266:history; D049673:History, 20th Century; D006801:Humans; D008567:Membranes, Artificial; D008828:Microbiological Techniques / Q000266:history; D010517:Periodontics / Q000266:history / Q000295:instrumentation* / Q000379:methods*; D010518:Periodontitis / Q000266:history / Q000601:surgery
chemical_list: D008567:Membranes, Artificial