title: [Observations on human natural dental plaque associated with normal, periodontally diseased and carious teeth by scanning electron microscopy].
abstract: A study on the structure of human natural dental plaque on the mesial surface of normal teeth, gingivitis teeth, periodontitis teeth, juvenile periodontitis teeth and carious teeth was carried out using scanning electron microscopy. The aim of this study was to contrast their mutual structure characteristics. From this investigation it can be concluded that 1. the structure and microbial composition of the dental plaque differs markedly in normal teeth, periodontally diseased teeth and carious teeth. 2. the significant higher proportion of spirochetes in subgingival plaque plays an active role in the pathogenesis of periodontitis. 3. the results of this study also point out that the pathogenic agents and pathogenesis differ in gingivitis, periodontitis, juvenile periodontitis and caries.
authors.forename: P
authors.initials: P
authors.lastname: Chen
mesh_terms: D000293:Adolescent; D000328:Adult; D003731:Dental Caries / Q000473:pathology*; D003773:Dental Plaque / Q000382:microbiology / Q000648:ultrastructure*; D005891:Gingivitis / Q000473:pathology; D006801:Humans; D010518:Periodontitis / Q000473:pathology*