Final answer:
The dentinal bonding system's adhesive mechanism is the hybrid layer, formed by applying dentin bonding agents to the tooth surface. This layer creates a strong bond between the tooth structure and restorative material.
Step-by-step explanation:
The dentinal bonding system relies on a mechanism called the hybrid layer to secure the adhesive. The hybrid layer is formed by the application of dentin bonding agents to the tooth surface. These agents contain a mixture of resin monomers, solvents, and initiators.
When applied to the tooth, the bonding agent infiltrates the dentinal tubules, creating a hybrid layer. This layer consists of resin tags that penetrate the dentin and create a strong bond between the tooth structure and the restorative material.