Are fluoride supplements taken by women during pregnancy effective in preventing dental caries in their offspring?

• A. Yes
• B. No
• C. Unknown
• D. Not sure

Answer: (B)

The key idea is that preventing a child’s dental caries relies on fluoride exposure after teeth have erupted, not on fluoride taken by the mother during pregnancy. Fluoride’s main protective actions occur when it is present in the mouth and incorporated into developing enamel after eruption, through sources like fluoridated water, fluoride toothpaste, and professional applications. While fluoride can cross the placenta, there isn’t convincing evidence that maternal fluoride supplements during pregnancy reduce the child’s caries risk. Therefore, prenatal fluoride supplementation is not an effective strategy for preventing dental caries in offspring; emphasis should be on the child’s fluoride exposure after birth, along with good oral hygiene and a caries-preventive diet.