What is the caries-active period, when pit and fissure sealants are especially useful for selected patients?

• A. Ages 0-5
• B. Ages 6-15
• C. Ages 16-25
• D. Ages 26-40

Answer: (B)

Pit and fissure sealants are most protective during the period when newly erupted teeth are most vulnerable to decay. The first permanent molars erupt around ages 6 to 7 and the eruption window extends through early adolescence, up to about age 15. These teeth have deep pits and fissures that trap plaque, and the enamel is still maturing, making pits and fissures especially susceptible to caries. Sealing these surfaces during this window creates a durable barrier that prevents plaque acids from penetrating and forming decay. Because this is when the teeth are erupting and caries risk is highest, this is when sealants provide the greatest benefit for selected patients with high caries risk, such as those with limited fluoride exposure, poor oral hygiene, or frequent sugar intake. After about mid-teens, the immediate eruption-related risk diminishes, so while sealants can still be useful, the strongest preventive impact is seen during ages 6–15.