California Registered Dental Assistant (RDA) Written Practice Exam

Which of the following modifications/additions may be included to avoid seating a custom tray too deeply?

1. Grooves

2. Beads

3. Stops

4. Handles

The correct answer is: Stops

Possible Explanation When seating a custom tray in a patient's mouth, it is important to avoid seating it too deeply as this can cause discomfort and make it difficult to remove. Grooves, beads, and handles may not effectively prevent the tray from being seated too deeply. Grooves and beads may not provide enough resistance and can still slide down, while handles may not be reliable in preventing the tray from being inserted too deep. Stops, on the other hand, act as physical barriers and can effectively prevent the tray from being pushed in too far, making them the best option for avoiding the problem of seating a custom tray too deeply.