A noninvasive means of preserving tooth structure & at the same time preventing dental decay

• A. Dental sealants
• B. Fluoride varnish
• C. X-ray
• D. Braces

Answer: (A)

Dental sealants are the best option because they provide a noninvasive physical barrier that preserves tooth structure while preventing decay. They are a resin coating applied to the chewing surfaces, especially the grooves of molars and premolars, after a quick cleaning and enamel conditioning. The sealant fills in deep pits and fissures, creating a smooth surface that plaque and bacteria cannot easily colonize. Since nothing is drilled away, the natural tooth remains intact while its most vulnerable areas are protected from caries. Fluoride varnish also helps prevent decay by strengthening enamel, but it doesn’t seal the grooves like a resin sealant does, so it doesn’t offer the same level of protection against pit-and-fissure caries. X-ray and braces are not preventive measures for dental decay.