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A descriptive epidemiologic survey of root caries in 473 20- to 64-year-olds revealed an age- and sex-adjusted overall root caries index (RCI) rate of 11.4% indicating that approximately one in nine surfaces with recession exhibited root caries. Although age-adjusted RCI rates for males and females were similar, the sex-adjusted RCI rates for each decade of life between 20 and 60 increased from 1.1% to 4.7% to 13.0% to 22.0%. Intraoral distribution patterns for root caries revealed that the most frequently attacked tooth types were mandibular molars (RCI = 40%), mandibular premolars (RCI = 25%) and maxillary canines (RCI = 23%). The least frequently attacked tooth types were the mandibular incisors (RCI = 2%). The interproximal surfaces exhibited the highest RCI rates in the maxillary arch while the buccal surfaces showed the highest RCI rates in the mandibular arch.
Katz et al. (Tue,) studied this question.