What percentage of children have enamel defects?

• A. 10-20%
• B. 20-40%
• C. 40-60%
• D. 60-80%

Answer: (B)

Enamel defects arise from disturbances in enamel formation during childhood, typically when ameloblasts are affected in early life. These defects include hypoplasia (quantitative loss of enamel) and opacities (qualitative changes), often linked to factors like systemic illness, malnutrition, fever, medications, premature birth, or fluoride exposure. Because many children experience at least a mild disturbance, the prevalence of enamel defects in the general population commonly falls in the 20-40% range, though exact numbers vary by diagnostic criteria and population. So about one in five to two in five children show some form of enamel defect, making the 20-40% range the best-supported answer. Higher ranges (60-80%) are less typical in general populations, while very low ranges (10-20%) may miss milder cases that are still clinically evident.