Principals of Amalgam Cavity Preparation Practice Test

When the remaining dentin thickness is very small (less than 0.5 mm), a protective and bonding stack is used: a liner to seal dentin tubules and shield the pulp, a base to provide thermal insulation and mechanical support, and a bonding agent to ensure durable adhesion between the dentin and the composite. This combination addresses pulpal protection, structural support, and strong bonding in a deeply prepared cavity. Using only a liner or only a bonding agent wouldn’t give the necessary insulation or reinforcement, and a sealer isn’t the appropriate choice for this restoration scenario.