National Dental Assisting Examining Board (NDAEB) Practice Exam

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Prepare for the National Dental Assisting Exam with comprehensive quiz questions, including multiple choice and detailed explanations. Equip yourself for success!

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How should the final impression material be applied to minimize air entrapment?

Quickly and broadly
Slowly and evenly
With rapid extrusion
Through a syringe tip

The correct answer is: With rapid extrusion

The application of final impression material is a critical step in obtaining accurate dental impressions, particularly to avoid issues such as air entrapment that can lead to distorted or incomplete impressions. Using a method characterized by rapid extrusion can significantly reduce the likelihood of air being trapped within the material. When the material is extruded quickly, it encourages a more uniform spread across the dental surface, allowing it to flow and fill in the anatomical details reliably. This rapid application minimizes the amount of time the material is exposed to air, thereby reducing the chance of bubbles forming. In contrast, methods that involve slower application or a broad, more deliberate approach may inadvertently allow air to become trapped in the material before it sets. When using a syringe tip for the extrusion, while it can help in delivering the material to specific areas, if not done with the right speed, it can also create spaces for air to enter, which could affect the final outcome. Therefore, using rapid extrusion is particularly effective in ensuring a dense, bubble-free impression suitable for creating accurate dental restorations or assessments.