Retention in a Class II preparation is enhanced primarily by which method?

The method that enhances retention in a Class II preparation is cavity design, which plays a crucial role in the overall success of restorative procedures. In Class II preparations, the design involves creating specific geometries that allow for mechanical retention of the restorative material.

This includes the preparation's outline form and depth, which can influence how well the restoration adheres to the tooth structure. The cavity design may incorporate features such as dovetails or undercuts that lock the restorative material into place, preventing dislodgement due to masticatory forces. Optimal cavity design considers the biomechanical properties of both the tooth and the restorative material, ensuring that they work together effectively.

While dental bonding agents can improve the bond between the restorative material and tooth structure, their effect relies heavily on the preparation design for optimal performance. Similarly, although the addition of composite material is essential for filling the cavity, its retention largely depends on the previous steps taken during the cavity preparation. Patient compliance, while important for overall dental health, is not directly involved in enhancing retention of the restoration itself.