What is the purpose of using high-speed handpieces?

The correct choice highlights that high-speed handpieces are primarily designed for the purpose of reducing tooth structure. These instruments are equipped with a rotating bur that reaches high speeds, allowing for efficient cutting and removal of dental hard tissues such as enamel and dentin. This capability is crucial during various procedures, including cavity preparation, crown preps, and other restorative work where precise and swift reduction of tooth structure is essential.

High-speed handpieces also facilitate a more controlled and less traumatic removal of tooth material compared to other types of handpieces, which enhances procedural efficiency and patient comfort. They are often used in combination with water spray to keep the tooth cool and to wash away debris, further emphasizing their role in effective tooth structure reduction during restorative dental procedures.