High quality epidemiological data are essential for both the development of national oral health policies and cost-effective targeting of resources. Unfortunately, a high level of clinical heterogeneity between studies in this area makes it difficult, and inappropriate, to try to produce any definitive figures on the global prevalence or incidence of root caries. Published studies have reported wide ranges for the prevalence of root caries (25-100%) and the mean Root Caries Index (9.7-38.7). The reported range for annual root caries incidence is also wide, from 10.1 to 40.6%. While more research is needed in this area, most studies conclude that the burden of root caries is high in the older age population.