In vitro colonisation of acrylic resin denture base materials by Streptococcus oralis and Actinomyces viscosus.
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.
Kagermeier-Callaway
A S
AS
Poliklinik für Zahnerhaltungskunde, Mainz, Germany.
Willershausen
B
B
Frank
T
T
Stender
E
E
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*
D000180:Acrylic Resins