Which factors place children at higher risk for enamel defects and caries?

• A. Preterm; low birth rate
• B. Full-term; normal birth weight
• C. No fluoride exposure
• D. Excellent dietary habits

Answer: (A)

Premature birth with low birth weight disrupts enamel formation during critical periods of tooth development, making enamel defects like hypoplasia or hypomineralization more likely. When enamel is defective, its surface becomes rough and porous, providing niches for plaque accumulation and easier acid attack, which raises the risk of caries as teeth erupt and are exposed to the oral environment. In contrast, being full term with normal birth weight usually doesn’t involve the same developmental disruption, so enamel tends to form more normally. While not having fluoride exposure does increase overall caries risk by reducing enamel resistance, it isn’t a primary factor for enamel defects themselves. Excellent dietary habits reduce caries risk and do not explain the enamel defects seen with prematurity.