Which type of bonding is used with composite restorations?

Etched enamel bonding is commonly used with composite restorations because it enhances the adhesion properties between the tooth structure and the composite material. This bonding technique involves the application of an acid etchant to the enamel surface, which creates micro-retentive features by dissolving some of the mineral content. This etching process increases the surface area and creates a roughened texture that allows the bonding agent to penetrate and mechanically lock into the enamel, resulting in a stronger bond.

When composite materials are applied after the surface has been etched and properly treated with a bonding agent, the bond between the enamel and composite is significantly improved, leading to better retention and reduced likelihood of marginal leakage. This technique is critical for ensuring the longevity and success of the restoration. Other bonding types, such as self-adhesive or light-cured bonding, may be used in different contexts or with different materials, but etched enamel bonding specifically addresses the critical interface between the composite materials and the enamel surface for optimal results.