Comparison of plaque microflora between Chinese and Caucasian population groups

C. F. Cao, D. M. Aeppli, William F Liljemark, C. G. Bloomquist, C. L. Bandt, Larry F Wolff

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39 Scopus citations


Abstract This investigation was designed to compare the predominant plaque micro‐organisms from a Chinese group of patients exhibiting periodontitis with an age‐, sex‐ and periodontal disease‐matched Caucasian group of patients. In addition to race, the 2 population groups differed with respect to diet and oral hygiene habits, or effectiveness at removing plaque. Clinical measurements were determined along with an evaluation for micro‐organisms in supragingival and subgingival plaque. Although the Chinese and Caucasian population groups were similar with respect to composition of micro‐organisms in subgingival plaque, notable differences were observed in supragingival plaque. The Chinese group had higher mean proportions of spirochetes. motile rods, Fusobocterium spp. and dark‐pigmented Bacteroides species, while the Caucasian group had higher mean proportions of cocci, total Actinomyces spp., A. viscosus and total Streptococcus spp. in supragingival plaque. The microbial differences observed in supragingival plaque may be explained at least in part, if not totally, by the higher plaque index scores of the Chinese versus Caucasian population groups.

Original languageEnglish (US)
Pages (from-to)115-118
Number of pages4
JournalJournal of clinical periodontology
Issue number2
StatePublished - Feb 1990


  • periodontal disease
  • plaque
  • race


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