Sealants have the best result when applied within what timeframe after eruption of molars and on which surfaces?

• A. Within 6 months of eruption of molars, on pits and fissures
• B. After 2 years of eruption
• C. Only after adolescence
• D. Only on incisors

Answer: (A)

Sealants protect the greatest caries risk area—the pits and fissures of newly erupted molars—by creating a smooth, sealed surface that blocks plaque and bacteria from entering those grooves. Applying sealants within six months of eruption takes advantage of the enamel’s pristine, clean state and the grooves being most accessible for bonding. At this early window, the sealant bonds well and is less likely to be compromised by occlusal wear or contamination, maximizing retention and caries prevention.

Delaying sealing past the eruption window reduces the likelihood of the sealant staying intact and effective, and applying only on incisors or waiting until adolescence isn’t aligned with the high-risk pits and fissures on molars. Thus, sealing soon after eruption on the molar pits and fissures provides the strongest preventive benefit.