To estimate the prevalence and experience of dental caries among 15-year-old adolescents in north-west Russia between 2007 and 2008. Study design. A cross-sectional study. In total, 352 adolescents at the age of 15 were selected at random from 3 urban and 4 rural areas in the Arkhangelsk region. Girls comprised 53.4% of the sample. Caries experience was assessed at D3 level by a single calibrated ...