Resin-based fillings and birth weight
A secondary aim of the study was to evaluate the association among resin-based filling materials, sealants, and birth weight. Before or after adjustment for sociodemographic, medical, or dental potential confounders, there was no association between the use of resin-based materials and low birth weight (table 3) (odds ratio 5 0.83, 95 percent confidence interval: 0.55, 1.25). There also was no association identified between the number of teeth or surfaces filled with resins and the odds for low birth weight (table 4). When the analyses were limited to women who did not receive amalgam fillings or sealants, similar associations were observed between resin-based restorations and low birth weight (table 4)