Which scenario most justifies sealant use?

• A. Healthy teeth with no pits
• B. Occlusal adjustment needed
• C. High caries risk with deep pits and fissures
• D. Advanced periodontal disease

Answer: (C)

Sealing pits and fissures on chewing surfaces aims to prevent decay by creating a smooth, protective barrier where plaque and food debris tend to accumulate. This is most justified when a patient has a high risk of caries and the grooves are deep, because those deep pits and fissures are the exact areas where caries commonly begins and progresses despite routine brushing. A sealant fills and seals those irregularities, reducing cariogenic plaque retention and acid attack, and is particularly beneficial for newly erupted molars or patients with elevated caries risk.

In contrast, a tooth that is healthy with no pits doesn’t have vulnerable grooves to protect, so sealants offer little benefit. Occlusal adjustment is a bite-balance procedure that doesn’t address caries prevention, and advanced periodontal disease concerns the gums and supporting structures rather than the enamel surfaces targeted by sealants.