Clinical decision-making for caries management in root surfaces.

This report presents the results of an evidence-based approach to obtaining the best available information on the natural history, prevalence, incidence, diagnosis, and treatment of root caries. Searches of electronic databases produced 807 references; from these and from citations in the selected articles, a final 161 references were used. We found that the information on the natural history of the disease does not provide practitioners with probabilities of, or time estimates for, progression of the disease through stages. For patients aged thirty and older, the prevalence of root caries is roughly 20 to 22 percent less than a person's age. Severity reaches over one lesion by age fifty, two lesions by age seventy, and just over three lesions for those seventy-five and older. About 8 percent (odds of 1:11) of the population would be expected to acquire one or more new root caries lesions in one year. The accuracy of current systems of diagnosis is unknown, although color has been shown to have little validity. Using the criteria of "softness" to define active lesions has been validated by the presence of microbes in the lesion. One strong study and other studies with weaker design or shorter duration add consistent support for the use of fluorides in the remineralization of root caries. Every three-month application of chlorhexidine varnish was shown to be efficacious in one arm of one study. Evidence for restoration of root caries is tentative since the studies were of limited design and duration.