HESI General Chairside Assisting Practice Exam

Which precaution should be taken when preparing glass ionomer restorative material?

1. Keep all materials at room temperature

2. Apply a wax protectant to the matrix band

3. Use a metal spatula for mixing

4. Store in a refrigerator until use

The correct answer is: Apply a wax protectant to the matrix band

When preparing glass ionomer restorative material, applying a wax protectant to the matrix band is an important precaution because it helps prevent the glass ionomer from sticking to the band during the setting process. Glass ionomers are known for their adhesion properties, and if they bond to the matrix band, it can disrupt the integrity of the restoration and complicate the removal of the band after setting. Other options, although they may seem reasonable in other contexts, do not specifically enhance the effectiveness or functionality of the glass ionomer preparation. Keeping materials at room temperature is often necessary for optimal handling; however, it is not specific to the unique properties of glass ionomer. Using a metal spatula for mixing might not be ideal due to the risk of reaction with the components or potential for uneven mixing. Storing in a refrigerator can also affect the handling and properties of the restorative material, as cold materials may not mix as smoothly or apply effectively.