Association between Low blood lead levels and increased risk of dental caries in children: a cross-sectional study
- Authors
- Kim, Young-Suk; Ha, Mina; Kwon, Ho-Jang; Kim, Hae-Young; Choi, Youn-Hee
- Issue Date
- 13-1월-2017
- Publisher
- BIOMED CENTRAL LTD
- Keywords
- Blood lead; Children; Dental caries; Deciduous dentition
- Citation
- BMC ORAL HEALTH, v.17
- Indexed
- SCIE
SCOPUS
- Journal Title
- BMC ORAL HEALTH
- Volume
- 17
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/84920
- DOI
- 10.1186/s12903-017-0335-z
- ISSN
- 1472-6831
- Abstract
- Background: The objective of this study was to examine the association between low blood lead levels of <5 mu g/dL and the development of dental caries among children. Methods: The Children's Health and Environment Research (CHEER) group recruited a cohort of 7,059 school-aged children from six Korean cities. The final study populations in the permanent and deciduous teeth groups were 1,564 and 1,241 children, respectively, after excluding 4 children with blood lead levels of >5 mu g/dL. Compared with the children who did not have dental caries, the risk of having dental caries according to blood lead level was estimated by using the zero-inflated negative binomial model. Results: The geometric mean (geometric standard deviation, maximum) blood lead level was 1.53 mu g/dL (1.57, 4. 89 mu g/dL), and 74.4% of children had a level of <2 mu g/dL. Blood lead level was significantly higher in the children with than in those without deciduous dental caries (1.59 vs. 1.51 mu g/dL), similarly with permanent dental caries (1. 65 vs. 1.51 mu g/dL). After adjustment for covariates, deciduous teeth surfaces that were decayed and filled increased significantly with increasing blood lead levels in a dose-dependent manner (prevalence ratio, 1.14; 95% confidence interval: 1.02-1.27). However, the risk of having dental caries in permanent teeth was not linearly associated with the increase in blood lead level. Conclusions: In the sum of decayed and filled surfaces, we found a significant increase in risk of dental caries of the deciduous teeth with an increase in blood lead levels (<5 mu g/dL) but found no statistical significance in the association with decayed and filled surfaces of caries separately.
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