Prolonged breastfeeding and dental caries in preschool children.

Purpose: To explore breastfeeding from 6 to 18 months of age and to study the association between breastfeeding and caries prevalence at 5 years of age.

Methods: The study included 1088 children from one Norwegian county and was based on the Norwegian Mother, Father and Child Cohort Study (MoBa). The children had clinical dental examination at 5 years of age, and parents answered a questionnaire, which included information on breastfeeding, oral health behaviour and child characteristic. Multivariate logistic regressions were performed. The study was ethically approved.

Results: Of the studied children, 77% were breastfed at 6 months of age and 16% were still breastfed at 18 months of age. Few children (6%) were breastfed during night at 18 months of age, while 11% received sugary drink during night. No association was found between breastfeeding up to 18 months of age and caries prevalence at 5 years of age (p > .05). Children who at 18 months of age had their teeth brushed less than twice daily (OR 2.4, CI 1.5-3.9), consumed sugary drink once a week or more often (OR 1.7, CI 1.1-2.7) and had non-Western parents (OR 3.4, CI 1.5-8.1) were more likely to have caries experience at 5 years of age than other children.

Conclusion: Breastfeeding up to 18 months of age was not associated with caries development during preschool age.