Rotary handpiece: Which speed and pressure are recommended?

• A. High Speed, Light Pressure
• B. Low Speed, Moderate Pressure
• C. Low Speed, Heavy Pressure
• D. Low Speed, Light Pressure

Answer: (D)

Heat control is the key idea here. A rotary handpiece can generate a lot of friction heat, especially if you press hard or spin fast. For tasks like polishing or finishing, using a low speed keeps heat production manageable, and applying only light pressure minimizes friction and prevents tissue or tooth surface damage. This combo gives you better control and reduces the risk of overheating or scratching.

High speed is generally reserved for cutting, where different techniques and cooling are used; applying heavy or even moderate pressure at any speed increases heat and wear, making damage more likely. So the safe, effective choice for routine polishing or finishing is low speed with light pressure.