California Registered Dental Assistant (RDA) Written Practice Exam 2025 – Comprehensive Study Guide to Ensure Exam Success!

Question: 1 / 400

Which supplemental material is contraindicated under composite resin and glass ionomer restorations?

Calcium Hydroxide

Glass Ionomer

Varnish

Varnish is the only material that is contraindicated under composite resin and glass ionomer restorations. This is because varnish contains solvents that act as a barrier and may prevent proper bonding of the composite resin and glass ionomer materials. Calcium hydroxide and glass ionomer are actually both commonly used as liners under composite resin and glass ionomer restorations and are not contraindicated. Composite resin is also a material used in these restorations, so it is not the correct answer.

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Composite Resin

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