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Within-subject Coronal Caries Distribution Patterns: An Evaluation of Randomness with Respect to the Midline

Department of Dental Public Health Sciences, School of Dentistry SM-35, University of Washington, Seattle, Washington 98195, Department of Epidemiology, School of Public Health and Community Medicine, University of Washington, Seattle, Washington 98195

R.J. Lamont

Department of Oral Biology, University of Washington, Seattle, Washington 98195

T.A. DeRouen

Department of Dental Public Health Sciences, School of Dentistry SM-35, University of Washington, Seattle, Washington 98195, Department of Biostatistics, University of Washington, Seattle, Washington 98195

S. Davis

Department of Epidemiology, School of Public Health and Community Medicine, University of Washington, Seattle, Washington 98195, Program in Epidemiology, Division of Public Health Sciences, Fred Hutchinson Cancer Research Center, Seattle, Washington 98104

B.G. Leroux

Department of Dental Public Health Sciences, School of Dentistry SM-35, University of Washington, Seattle, Washington 98195, Department of Biostatistics, University of Washington, Seattle, Washington 98195

The distribution of caries among homologous surfaces can exhibit three possible patterns: random, aggregated, or regular. In a random caries pattern, caries lesions are randomly distributed among homologous surfaces. An aggregated caries pattern is distinguished by the aggregation of lesions on one side of the mouth or the other to a greater extent than would be expected by chance alone. For a regular caries pattern, the left-right distribution of lesions is more homogenous than would be expected by chance alone. A test statistic based on the left-right distribution of caries lesions among discordant homologous pairs was developed to investigate which of these three caries patterns is present in a representative sample of the adult United States population. The data originated from the National Survey of Oral Health in the US (Employed Adults), 1985-1986. Of the 15,132 subjects studied, 12,776 subjects had 2 or more decayed or filled teeth. (At least 2 carious or filled teeth are required for detection of patterns.) Approximately 50% of these subjects (n = 6,439) had two or more discordant homologous tooth pairs. With these tooth pairs, the hypothesis of a random caries pattern was rejected in favor of an aggregated caries pattern (p < 0.0001). Similar findings were obtained with discordant homologous surface pairs. This aggregation of caries on one side of the mouth or the other may be due to genetic, infectious, and/or environmental factors.

Key Words: Dental Caries • DMF Index • Statistics • Epidemiology.

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Journal of Dental Research, Vol. 73, No. 9, 1575-1580 (1994)
DOI: 10.1177/00220345940730091401


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This Article Abstract Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Add to Saved Citations Download to citation manager Request Permissions Request Reprints Add to My Marked Citations Citing Articles Citing Articles via Google Scholar Citing Articles via Scopus Google Scholar Articles by Hujoel, P.P. Articles by Leroux, B.G. Search for Related Content PubMed PubMed Citation Articles by Hujoel, P.P. Articles by Leroux, B.G. Social Bookmarking                         What's this?