Ohio Expanded Function Dental Assistant (EFDA) Board Practice Exam

The placement of glass ionomer on dentin before the application of composite is commonly known as the sandwich technique. This method involves creating a layered structure where the glass ionomer, known for its chemical bond to dentin and ability to release fluoride, is placed first. This not only provides effective support to the overlying composite restoration but also helps to reduce sensitivity and protects the pulp by acting as a barrier against thermal and chemical stimuli.

The sandwich technique is especially valuable in situations where the cavity preparation is close to the pulp, as it enhances the overall mechanical properties of the restoration, incorporates the beneficial features of both materials, and improves the longevity of the composite filling. The glass ionomer acts as a liner or base, creating a strong interface for the more esthetic composite material applied on top.

In contrast, the other techniques mentioned do not specifically incorporate the glass ionomer layer under the composite as part of their standard definition. Therefore, the sandwich technique is the most accurate and widely accepted term for this specific sequence of material application in dental restorations.