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August 30, 2026

Socioeconomic inequalities in untreated root caries in adults and older adults in two national cross-sectional samples.

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Authors

LCLuiz Alexandre ChisiniRadboud University NijmegenLSLuana Carla SalviRadboud University NijmegenJMJaqueline Barbieri MachadoUniversidade Federal de Pelotas

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Implication

Cross-sectional study reveals widening socioeconomic disparities in untreated root caries among adults, indicating unequal oral health gains despite rising tooth retention.

Key Points

  • To evaluate temporal changes in socioeconomic inequalities in untreated root caries among dentate adults and older adults across two national oral health surveys.
  • Analysed cross-sectional data from 28,318 dentate participants (13,220 in 2010 and 15,098 in 2023) aged 35–44 and 65–74 years from the Brazilian National Oral Health Surveys (SBBrasil).
  • Assessed untreated root caries using WHO criteria alongside socioeconomic position metrics estimated through generalised structural equation modelling.
  • Quantified absolute and relative inequalities using the Slope Index of Inequality (SII) and Concentration Index (CIX).
  • Between 2010 and 2023, edentulism decreased from 20.2% to 11.5%, while overall root caries prevalence increased from 16.0% (95% CI: 14.2–17.9) to 22.0% (95% CI: 19.2–25.2).
  • Among adults aged 35–44, absolute socioeconomic inequalities in root caries worsened over time, expanding from -17.6 to -21.7 percentage points by latent socioeconomic position.
  • Among older adults aged 65–74, socioeconomic inequalities emerged consistently across all measures in 2023, reaching an SII of -23.8 percentage points and a CIX of -15.4.

Cite This Study

Chisini et al. (2026) studied this question.

synapsesocial.com/papers/6a93f08e6c1a8fb52e79cce4https://doi.org/10.1159/cre/abuag005
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