title: In vitro colonisation of acrylic resin denture base materials by Streptococcus oralis and Actinomyces viscosus.
abstract: OBJECTIVE
  The aim of the study was to compare the attachment of two typical strains of oral bacteria to four denture base materials.
  
  
  METHODS
  In vitro study.
  
  
  METHODS
  Discs of acrylic resin denture base materials (Paladon 65, polished and unpolished; Palapress; Microbase, polished and unpolished, and Triad VLC) were placed into Petri dishes with Schaedler's medium, inoculated with Streptococcus oralis 34 or Actinomyces viscosus T14V.
  
  
  METHODS
  After 24 h or 48 h the numbers of adhering bacteria were measured.
  
  
  RESULTS
  The bacteria adhered to all discs in similar numbers: 3-9 x 10(6)/ml (viable cell count) and 9-22 x 10(8)/ml (total cell count) for T14V, and 2-6 x 10(6)/ml (viable cell count) and 1.5-3 x 10(8)/ml (total cell count) for 34.
  
  
  CONCLUSIONS
  Polishing had little effect on adherence. Denture base materials are not resistant against adherence and possible surface damage by oral bacteria. Therefore, thorough oral hygiene is important for denture wearers.
authors.affiliation: Poliklinik für Zahnerhaltungskunde, Mainz, Germany.
authors.forename: A S
authors.initials: AS
authors.lastname: Kagermeier-Callaway
authors.forename: B
authors.initials: B
authors.lastname: Willershausen
authors.forename: T
authors.initials: T
authors.lastname: Frank
authors.forename: E
authors.initials: E
authors.lastname: Stender
mesh_terms: D000180:Acrylic Resins; D016924:Actinomyces viscosus / Q000502:physiology*; D001422:Bacterial Adhesion; D015169:Colony Count, Microbial; D003773:Dental Plaque / Q000382:microbiology; D003775:Dental Polishing; D003819:Denture Bases / Q000382:microbiology*; D008855:Microscopy, Electron, Scanning; D019533:Streptococcus oralis / Q000502:physiology*; D013499:Surface Properties; D014093:Tooth, Artificial / Q000382:microbiology*
chemical_list: D000180:Acrylic Resins