What is the correct order of materials to use when performing a deep composite restoration near the pulp?

When performing a deep composite restoration near the pulp, using the materials in the correct order is crucial for ensuring the health of the pulp and the success of the restoration. The first step is to apply calcium hydroxide. This material serves as a dentin liner and provides vital pulp protection. It helps to promote the formation of secondary dentin and can facilitate the healing of the pulp if it is exposed to the preparation.

Next, glass ionomer (GI) can be placed over the calcium hydroxide. GI acts as a base that provides additional thermal insulation and has the added benefit of fluoride release, which can further support the health of the tooth and surrounding structures.

Following this, applying a bonding agent, such as a prime and bond, helps in ensuring a strong adhesion of the composite material to the tooth structure. This layering allows for effective sealing of the restoration and minimizes the risk of microleakage, which can lead to further complications such as sensitivity or caries.

This sequence emphasizes the protective measures necessary when the preparation is close to the pulp, ensuring that both the restorative material and the tooth structure maintain integrity and health.