High-speed handpieces are dental tools used by dentists to perform various procedures, such as drilling and cutting teeth. These devices operate at speeds of up to 400,000 revolutions per minute, allowing for efficient removal of tooth material and quick adjustments during treatments. They are typically powered by compressed air and are designed to be lightweight and easy to maneuver. The design of high-speed handpieces includes a small, rotating bur that can be easily replaced. They are essential for procedures like cavity preparation and crown placement, making them a vital part of modern dentistry. Proper maintenance and sterilization are crucial to ensure their effectiveness and safety in the dental office.