If caries free at 3 to 5 years, almost two-thirds less caries 7 to 10 years later.

If caries free at 3 to 5 years, almost two-thirds less caries 7 to 10 years later.

• A. 2 to 4
• B. 4 to 6
• C. 3 to 5
• D. 5 to 7

Answer: (C)

Being caries-free around ages 3 to 5 reflects a favorable balance of protective factors (like good oral hygiene, fluoride exposure, and healthier diet) that tends to persist as a child grows. Longitudinal data show that children who are caries-free in this early window experience substantially fewer caries later—about two-thirds less—when followed 7 to 10 years afterward. This makes the 3 to 5 year period the best predictor of a markedly lower caries burden in later childhood or adolescence. Starting this early window outside 3–5 years doesn’t align with the same consistent protective effect observed.

Being caries-free around ages 3 to 5 reflects a favorable balance of protective factors (like good oral hygiene, fluoride exposure, and healthier diet) that tends to persist as a child grows. Longitudinal data show that children who are caries-free in this early window experience substantially fewer caries later—about two-thirds less—when followed 7 to 10 years afterward. This makes the 3 to 5 year period the best predictor of a markedly lower caries burden in later childhood or adolescence. Starting this early window outside 3–5 years doesn’t align with the same consistent protective effect observed.