Dental sealants are typically made of what material?

• A. Glass ionomer
• B. Resin-based composite
• C. Metal alloy
• D. Porcelain

Answer: (B)

Sealants must stay bonded to enamel, seal deep pits and fissures, and withstand occlusal wear in the mouth. Resin-based composites fit this role best because, after enamel etching, they flow into the grooves and form a strong micromechanical bond when cured, providing durable, low-solubility sealing. Although glass ionomer sealants release fluoride and bond to tooth structure, they are less resistant to wear and dissolution in posterior fissures, making them less durable long-term for sealants. Metal alloys and porcelain are not used as sealants on vulnerable pits and fissures; they’re designed for restorations like crowns and veneers. Hence, the typical material for dental sealants is a resin-based composite.