What tooth-colored filling material bonds to tooth structure?

What tooth-colored filling material bonds to tooth structure?

• A. Amalgam
• B. Cement
• C. Gold
• D. Composite Resin

Answer: (D)

Composite resin bonds to tooth structure because it uses adhesive bonding systems that create a strong union with enamel and dentin. When the tooth surface is prepared, enamel is etched to create micro-porosities, and a bonding agent penetrates dentin to form a hybrid layer with resin tags in enamel. This micromechanical and chemical bonding allows the filling to adhere directly to the tooth, giving good seal and retention. Amalgam, in contrast, does not bond to tooth structure; it relies on mechanical retention in the cavity walls. Gold restorations are cast and are cemented in place rather than bonded chemically to dentin or enamel. Cement is not a tooth-colored filling material and isn’t the bonding mechanism for a typical filling.

Composite resin bonds to tooth structure because it uses adhesive bonding systems that create a strong union with enamel and dentin. When the tooth surface is prepared, enamel is etched to create micro-porosities, and a bonding agent penetrates dentin to form a hybrid layer with resin tags in enamel. This micromechanical and chemical bonding allows the filling to adhere directly to the tooth, giving good seal and retention.

Amalgam, in contrast, does not bond to tooth structure; it relies on mechanical retention in the cavity walls. Gold restorations are cast and are cemented in place rather than bonded chemically to dentin or enamel. Cement is not a tooth-colored filling material and isn’t the bonding mechanism for a typical filling.