A decade-long Swedish national registry study tracking 165,365 children and adolescents aged 10 to 20 years reveals that most remain caries-free, but a minority faces disproportionately high disease burden. Researchers used longitudinal caries data to classify young people into high, medium, and low caries trajectory groups, finding that differences between groups widened significantly by age 20 as cumulative caries load increased.

Early caries predicts later disease risk

Early childhood caries proved strongly correlated with later disease development, highlighting the importance of dental screening in preschool years. A single caries measurement at age 6 successfully identified children with elevated risk of developing caries later in childhood. For 10-year-olds, traditional caries indices showed limitations when applied to primary and mixed dentition, but supplementary measures provided clearer classification. The caries-specific index, which counts only those with existing caries experience, delivered consistently higher values than conventional indices and proved especially informative in early childhood when most children were caries-free.

Targeting prevention more effectively

Although oral health at the population level continues improving in Sweden, the study demonstrates that a clear minority carries disproportionate disease risk. Undetected early caries also negatively affects quality of life among Swedish preschoolers. By identifying high-risk groups earlier and more accurately, preventive interventions can be directed more effectively and resources allocated more efficiently within pediatric dental care. The findings support prioritizing dental surveillance during preschool years to intercept disease progression before it becomes entrenched.