What is the primary function of a dental handpiece?

The primary function of a dental handpiece is to remove tooth decay and prepare the tooth for restorations. This is a crucial aspect of dental procedures, as the handpiece enables the dentist to efficiently and effectively eliminate decayed tooth structure and shape the cavity for fillings or other restorative materials. Handpieces are equipped with rotating burrs or drills that vary in size and shape, allowing for precise work on the tooth.

While some dental procedures involve whitening teeth, administering anesthesia, or taking impressions, these functions are not performed with a handpiece. Instead, they require different instruments or tools. For instance, teeth whitening typically involves bleaching agents and specialized trays, anesthesia is administered via syringes, and impressions are taken using impression materials in custom trays. The dental handpiece's design and purpose specifically align with the preparation of teeth for restorative work, making this the correct answer.