HOSA Dental Terminology Practice

At what speed can a high-speed handpiece operate during dental procedures?

1. Up to 200,000 rpm

2. Up to 450,000 rpm

3. Up to 300,000 rpm

4. Up to 150,000 rpm

The correct answer is: Up to 450,000 rpm

High-speed handpieces are specialized dental instruments used primarily for cutting tooth structure, removing decayed tissue, and preparing cavities for fillings. These handpieces are designed to operate at very high speeds, which allows for efficient and precise work in a variety of dental procedures. The correct answer indicates that high-speed handpieces can operate at speeds of up to 450,000 revolutions per minute (rpm). This capability is essential because the high rotation speed helps in minimizing the amount of pressure applied to the tooth, reducing heat generation and the potential for damage to the surrounding tissues. Furthermore, high-speed handpieces are often equipped with water spray mechanisms that cool the tooth and provide a better visibility of the workspace, making the procedures more effective and comfortable for patients. Knowing the operational speed of these handpieces is crucial for dental professionals, as it impacts both the efficacy of the treatment and patient safety.