California Registered Dental Assistant (RDA) Written Practice Exam

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With the high-speed handpiece positioned on the occlusal surface of tooth 4, where would the HVE be positioned?

Buccal surface of tooth 5
Buccal surface of tooth 4
Lingual surface of tooth 3
Occlusal surface of tooth 6

The correct answer is: Lingual surface of tooth 3

The HVE (high volume evacuator) would be positioned on the lingual surface of tooth 3 while the high-speed handpiece is positioned on the occlusal surface of tooth 4 because the HVE will help to remove any debris and excess water from the field of work, allowing the dentist to have a clear view and prevent aspiration. The other options, such as the buccal surface of tooth 5 or 4, would not be appropriate as they are not as close to the area being worked on and may not effectively remove debris. Positioning the HVE on the occlusal surface of tooth 6 would also not be ideal as it is too far from the area being worked on.