What type of material is used for direct bonding restorative procedures?

Composite resin is the material utilized for direct bonding restorative procedures due to its ability to bond directly to the tooth structure. This material is favored because it can be color-matched to natural teeth, providing an aesthetically pleasing result. Composite resins possess strong adhesive properties, which allow for a secure bond to enamel and dentin, thus enhancing the durability and longevity of the restoration. Additionally, they can be directly sculpted and cured in the mouth, making them highly versatile for various restorative applications such as fillings, veneers, and even some crown procedures.

While glass ionomer can also be used in some restorative contexts, it is typically not applied in direct bonding for aesthetic reasons, as it is more opaque and less color-matching than composite resin. Amalgam is known for its strength but is not directly bonded to tooth structure; it relies on mechanical retention. Porcelain is primarily used for indirect restorations and requires a lab for fabrication, distinguishing it from the direct application of composite resins.