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Root Caries in an Optimally Fluoridated and a High-fluoride Community

Program in Dental Public Health, School of Public Health, The University of Michigan, Ann Arbor, Michigan 48109

A.I. Ismail

Program in Dental Public Health, School of Public Health, The University of Michigan, Ann Arbor, Michigan 48109

S.A. Eklund

Program in Dental Public Health, School of Public Health, The University of Michigan, Ann Arbor, Michigan 48109

The purpose of this study was to measure the prevalence and distribution of root caries in two New Mexico communities. One community, Deming, had a natural fluoride concentration of 0.7 mglL in its drinking water, optimum for its climate. The other, Lordsburg, was naturally fluoridated at 3.5 mg/L, five times the optimum. Dental examinations were carried out on 151 adults in Deming (mean age, 39.8 years) and 164 in Lordsburg (mean age, 43.2 years); only persons born in the communities were included. Prevalence of root caries was 23.8% in Deming and 7.3% in Lordsburg; mean number of lesions was 0.69 in Deming and 0.08 in Lordsburg (p < 0.0001). Although there was more gingival recession in Lordsburg, Root Caries Index scores were five times greater in Deming. Root caries was more prevalent in older age groups, and was correlated with coronal caries experience in both communities. Root caries was correlated with plaque and calculus scores in Deming only. Logistic regression showed that city of residence was the major predictor of root caries, with other significant predictors being age, education, gingival recession, and loss of periodontal attachment. When combined with previous research, these results confirm that root caries experience is directly related to the fluoride concentration in the drinking water.

Journal of Dental Research, Vol. 65, No. 9, 1154-1158 (1986)
DOI: 10.1177/00220345860650090801


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