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Lookup NU author(s): Emeritus Professor Roy Russell
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Ethyleneglycol dimethacrylate monomers have been previously reported to stimulate the growth of certain caries-associated bacteria on the basis of turbidity measurements. To elucidate the detail of this effect, we examined the influence of resin monomers on the growth of Streptococcus sobrinus and Streptococcus sanguis by determination of bacterial numbers (colony-forming units), morphological observation, and chemical analysis. Although the absorbance values in the stationary phase of bacterial suspension were increased in the presence of ethyleneglycol monomers, no significant differences were observed for bacterial numbers throughout the incubation period. Scanning electron microscopy observation revealed the formation of sparse vesicular material surrounding bacterial cells when incubated with ethyleneglycol monomers, and these products were proved to be resin polymers. The results demonstrate that the apparent biomass increase during incubation with ethyleneglycol monomers is due not to promotion of bacterial multiplication, but to the polymerization of resin monomers to form vesicular structures attached to cells.
Author(s): Takahashi Y, Imazato S, Russell RRB, Noiri Y, Ebisu S
Publication type: Article
Publication status: Published
Journal: Journal of Dental Research
Year: 2004
Volume: 83
Issue: 4
Pages: 302-306
ISSN (print): 0022-0345
ISSN (electronic): 1544-0591
Publisher: Sage
URL: http://dx.doi.org/10.1177/154405910408300406
DOI: 10.1177/154405910408300406
PubMed id: 15044503
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