title: [A study on the cariogenic bacteria of plaque on abutment teeth of casting and wrought wire clasp removable partial dentures].
abstract: OBJECTIVE
  The effect of clasp on the health of abutment teeth.
  
  
  METHODS
  To analyse and compare the cariogenic bacteria plaque getting from the buccal cervical third of casting and wrought wire clasp teeth before and one week after wearing removable partial dentures.
  
  
  RESULTS
  The average percentages of Streptococcus Mutans and Actinomyces Viscosus in total culturable bacteria rised significently in statistical analysis, but there was no significent difference of Lactobacilli. The average percentage of Actinomyces Viscosus increased less after wearing casting clasp RPD than that of wrought wire clasp.
  
  
  CONCLUSIONS
  Clasps of RPD increased the risk of root caries of abutment teeth. However the influence of casting clasps was smaller than that of wrought wire clasps.
authors.affiliation: School of Stomatology, Shanghai Second Medical University, Shanghai 200011.
authors.forename: F
authors.initials: F
authors.lastname: Zhang
authors.forename: M
authors.initials: M
authors.lastname: Zhu
authors.forename: W
authors.initials: W
authors.lastname: She
mesh_terms: D001419:Bacteria / Q000302:isolation & purification*; D002370:Casts, Surgical; D015169:Colony Count, Microbial; D000044:Dental Abutments / Q000382:microbiology*; D003722:Dental Alloys; D003731:Dental Caries / Q000382:microbiology*; D003773:Dental Plaque / Q000382:microbiology*; D003832:Denture, Partial, Removable / Q000382:microbiology*; D006801:Humans
chemical_list: D003722:Dental Alloys