What is the dental handpiece used for cutting hard tissue called?

• A. Low-speed handpiece
• B. High-speed handpiece
• C. Electric handpiece
• D. Hand-held scaler

Answer: (B)

The dental handpiece specifically designed for cutting hard tissue is known as a high-speed handpiece. This type of handpiece operates at a much higher RPM (revolutions per minute) compared to other handpieces, allowing it to effectively cut through enamel and dentin. The high-speed handpiece is typically used for procedures that require precise removal of tooth structure, such as cavity preparation or crown preparation.

The characteristics of the high-speed handpiece, such as its power, speed, and the types of burs it accepts, make it particularly suited for cutting hard tissues. These handpieces often have a water spray to cool the tooth and prevent overheating during the cutting process, which is critical for patient comfort and to protect the integrity of the tooth.

In contrast, the low-speed handpiece is generally used for more delicate procedures that involve polishing or finishing rather than cutting hard tissue. The electric handpiece, while also efficient, may vary in speed and use cases, and the hand-held scaler is specifically designed for scaling procedures, not cutting hard tissue.