title: Re: Local predisposing events leading to gingivitis and periodontitis.
mesh_terms: D000942:Antigens, Bacterial / Q000276:immunology / Q000378:metabolism; D003773:Dental Plaque / Q000382:microbiology; D005891:Gingivitis / Q000209:etiology* / Q000276:immunology / Q000382:microbiology; D006801:Humans; D006862:Hydrogen Sulfide / Q000494:pharmacology; D010518:Periodontitis / Q000209:etiology* / Q000276:immunology / Q000382:microbiology; D010539:Permeability / Q000187:drug effects; D012307:Risk Factors; D013438:Sulfhydryl Compounds / Q000494:pharmacology
chemical_list: D000942:Antigens, Bacterial; D013438:Sulfhydryl Compounds; C005231:methylmercaptan; D006862:Hydrogen Sulfide