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CLINICAL SCIENCE Longitudinal Microbiological Investigation of a Hospitalized Population of Older Adults with a High Root Surface Caries Risk
R.P. Ellen
University of Toronto, Faculty of Dentistry, 124 Edward Street, Toronto, ON, Canada M5G 1G6
D.W. Banting
Faculty of Dentistry, University of Western Ontario, London, ON, Canada N6A 5C1
E.D. Fillery
University of Toronto, Faculty of Dentistry, 124 Edward Street, Toronto, ON, Canada M5G 1G6
Intact root surfaces of chronically hospitalized subjects were sampled periodically to enumerate bacterial species believed to be associated with root caries. Bacteria were cultivated and enumerated using a series of selective and enriched media. Microbial counts, isolation frequencies, and percent cultivable flora data were analyzed for caries-active and caries-free surfaces and subjects. S. mutans, S. sanguis, A. viscosus, A. naeslundii, total lactobacilli, and Veillonella accounted for a mean of less than 20% of the cultivated flora, with mitis salivarius agar cultivable streptococci averaging less than 5%. The microbial count data were highly variable, precluding the finding of significant differences in caries association for either subjects or sites. Streptococci, especially S. mutans, correlated highly with lactobacilli in the samples.
Journal of Dental Research, Vol. 64, No. 12,
1377-1381 (1985)
DOI: 10.1177/00220345850640121001
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