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Caries Rates Related to Approximal Caries at Ages 11-13: A 10-year Follow-up Study in Sweden

¹ Department of Public Health and Clinical Medicine, Epidemiology, Umeå University, S-901 85 Umeå, Sweden; and
² Department of Pediatric Dentistry, Eastman Dental Institute, Stockholm, and Faculty of Odontology, Centre for Oral Sciences, Malmö University, Sweden;

* corresponding author, hans.stenlund{at}epiph.umu.se

Predicting future caries risk is a difficult but important clinical task. The aim of this study was to analyze radiographically the relationship between approximal caries (4d-7m) at ages 11-13 (baseline) and future approximal caries. We followed 534 individuals prospectively through annual bitewing radiographs from 11 to 22 years of age. Two measures were used: individual-based incidence of the first new approximal caries lesion and surface-based incidence of approximal lesions. In the group with no approximal caries lesions at baseline, the individual-based incidence was 19 first new approximal lesions/100 person-years; the corresponding value for those with 3 approximal lesions at baseline was 71. Individuals with no approximal lesions at baseline developed 3.1 new lesions/100 tooth surface-years; the corresponding value for those with 3 lesions at baseline was 7.7. The highest risk for developing new approximal lesions was within the first 2 years after baseline.

KEY WORDS: adolescents • approximal caries • caries rate • cohort • prediction • young adults