National Dental Assisting Examining Board (NDAEB) Practice Exam

Is copal varnish acceptable for placement under an amalgam restoration?

1. No, not at all

2. Depends on the situation

3. Yes, it is acceptable

4. Only with specific conditions

The correct answer is: Yes, it is acceptable

Copal varnish is indeed deemed acceptable for use under amalgam restorations. It acts as a barrier between the dentin and the dental material, helping to protect the pulp from thermal irritation and providing some degree of protection against microleakage. The application of copal varnish can also aid in minimizing post-operative sensitivity associated with amalgam restorations. It is important to note that copal varnish should be used in appropriate clinical situations where the protective qualities it offers are beneficial, particularly in cases where there is minimal risk of moisture contamination. While other materials, like glass ionomer or resin-modified glass ionomer, might be recommended for specific conditions, copal varnish serves its purpose effectively in routine scenarios. Therefore, its use can be considered generally acceptable in dental practice for amalgam restorations, especially in cases where the depth of the cavity and the overall clinical judgment support its application.