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The Effects of Different Levels of Dietary Sucrose on Root Caries subsequent to Gingivectomy in Conventional Rats Infected with Actinomyces viscosus M-100

Department of Restorative Dentistry, School of Dentistry, University of Alabama at Birmingham, University Station, Birmingham, Alabama 35294

C.N. Graves

Department of Physiology and Biophysics, University of Alabama at Birmingham, University Station, Birmingham, Alabama 35294

F.F. Feagin

Department of Physiology and Biophysics, University of Alabama at Birmingham, University Station, Birmingham, Alabama 35294

Three groups of weanling, Sprague-Dawley-derived rats were inoculated with Actinomyces viscosus M-100 and fed powdered diet containing either 67%, 5%, or 0% confectioner's sugar. Two further groups were fed diet containing 5% confectioner's sugar and inoculated with Streptococcus sobrinus 6715 or S. sobrinus 6715 plus A. viscosus M-100. The most coronal 1 mm of gingiva was removed from maxillary and mandibular right molar quadrants (gingivectomy), and the animals re-inoculated following gingivectomy. The animals were killed 64 days following gingivectomy, and the lingual surface of mandibular first molar roots was measured for exposed root-surface area and root caries. In the groups of rats infected with A. viscosus M-100, root caries area was significantly greater in the group fed diet containing 67% confectioner's sugar. Sucrose level did not significantly affect the amount of exposed lingual first molar root area regardless of whether the tooth had been subjected to a gingivectomy. In the groups of rats receiving diet containing 5% confectioner's sugar, there were no significant differences in root caries area or exposed root-surface area, regardless of the infection status of the animals. In the rat model presented here, a high level of dietary sucrose was a necessary condition for the initiation of root caries in the absence of other readily fermentable carbohydrates.

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Journal of Dental Research, Vol. 67, No. 10, 1342-1345 (1988)
DOI: 10.1177/00220345880670101901


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This Article Abstract Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Citation Map 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 Firestone, A.R. Articles by Feagin, F.F. Search for Related Content PubMed PubMed Citation Articles by Firestone, A.R. Articles by Feagin, F.F. Social Bookmarking                         What's this?