Final answer:
The dental assistant should use a firmly gripped grasp to hold the High-Volume Evacuator (HVE), utilizing the opposition movement of the thumb towards the fingers for a strong and precise grip.
Step-by-step explanation:
The dental assistant may hold the High-Volume Evacuator (HVE) using a firmly gripped grasp. This method is used to ensure control and stability when using the HVE during dental procedures. A firmly gripped grasp involves the opposition movement of the thumb toward the fingers, which allows for a secure hold on the HVE.
The opposition movement of the thumb is crucial as it provides a strong and precise grip by allowing the thumb to meet the other fingers. Not only does this increase the efficiency of dental procedures, but it also enhances the safety of both the patient and the dental assistant. Tight gripping leads to increased contact between the HVE and the medial side of the hand, thus improving the firmness of the grip.