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Comparison of two Scoring Methods for Root Surface Caries in Hamsters

Department of Restorative Dentistry, School of Dentistry, 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

C.N. Graves

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

G.K. Stookey

Oral Health Research Institute, School of Dentistry, Indiana University, 415 Lansing St., Indianapolis, Indiana 46202

C. Rodlun

Oral Health Research Institute, School of Dentistry, Indiana University, 415 Lansing St., Indianapolis, Indiana 46202

J. Warrick

Oral Health Research Institute, School of Dentistry, Indiana University, 415 Lansing St., Indianapolis, Indiana 46202

The aim of this investigation was to compare two methods of scoring root surface caries in hamster teeth. The experimental material was mandibles from hamsters which had been infected with Actinomyces viscosus, fed a caries-promoting diet, and received either 0, 1, 10, or 25 ppm fluoride in the drinking water during an 18-week experimental period (Stookey, 1986). Root surface caries on the lingual surfaces of mandibular first molars was scored according to the grid method of Doff et al. (1977) and by the quantitative planimetric method of Firestone et al. (1986). Data from both methods confirmed that 25 and 10 ppm fluoride were significantly more caries-inhibitory than 1 ppm fluoride, which, in turn, significantly reduced root surface caries compared with the 0 ppm control group. Correlation coefficients for caries scores (0.92) and ranking of the scores (0.88) for each animal between the two methods were highly significant (p < 0.0001). The planimetric measurement of root surface caries in hamsters was as sensitive as the grid-scoring method.

Journal of Dental Research, Vol. 67, No. 1, 44-45 (1988)
DOI: 10.1177/00220345880670010801


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