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!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

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Why is it important to outline the frenums in a custom tray?

To allow for adjustment
To improve esthetics
For elastomeric impression accuracy
To save material

The correct answer is: For elastomeric impression accuracy

Outlining the frenums in a custom tray is essential for elastomeric impression accuracy because the frenums are key anatomical landmarks that influence the contours and fit of prosthetics, dentures, or any dental work being fabricated. By marking the frenums, dental assistants ensure that the impression accurately captures the soft tissue contours important for proper function and aesthetics. This enhances the fit of the final restoration, as it allows for precise adaptation to the patient's anatomy, including areas where mobility and tissue dynamics are crucial for achieving comfort and effective retention of dental appliances. While adjusting for fit, aesthetics, or material conservation is important in custom tray design, the major focus is ensuring that the impression materials can replicate the intricate relationships between the dynamic tissues and the devices intended for use.