HOSA Dental Terminology Practice

What is defined as the last and most precise impression of a tooth?

1. Final impression

2. First impression

3. Temporary impression

4. Initial impression

The correct answer is: Final impression

The term "final impression" refers to the most accurate and definitive mold of a tooth or dental arch, capturing the exact details needed for fabricating dental appliances, crowns, bridges, or dentures. This impression is taken after all necessary preparations have been completed and is used to ensure a perfect fit and proper occlusion. The process typically involves highly precise materials, such as elastomeric vinyl polysiloxane or polyether, known for their dimensional stability and fine detail capture. In contrast, the other types of impressions mentioned serve different purposes. "First impression" generally refers to the initial capture, which might not be as detailed or precise. A "temporary impression" is used for provisional restorations and does not provide the same level of detail needed for final restorations. Lastly, the "initial impression" is often a broader term encompassing the first steps of diagnostic or preliminary impressions that are not suitable for definitive restorations. Hence, the final impression is essential for ensuring optimal outcomes in dental procedures.