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Dental caries, periodontal (gum) disease and tooth loss are common problems in OECD countries, variously affecting almost all adults and 60‐90% of school children (see Indicator 1.10 "Dental health among children").
Despite great improvements problems persist, occurring most commonly among disadvantaged and low income groups. In the United States for example, almost 50% of low income persons aged 20‐64 years had untreated dental caries in 2001‐04, compared
with only 20% of high income persons (NCHS, 2009). In Finland, onequarter of adults with lower education were found to have six or more missing teeth, while less than 10% of those with higher education had the same amount of tooth loss (Kaikkonen,