What device is used to hold abrasive disks in a handpiece?

A mandrel is specifically designed to hold abrasive disks in a handpiece, making it the correct choice for this question. Mandrels serve as a spindle or shaft that allows for the attachment of various dental tools, such as disks, wheels, and points. These components can easily be mounted on the mandrel, enabling their use during procedures that require abrasive action, such as cutting or shaping materials in dentistry.

The function of a mandrel is crucial because it ensures a secure and stable connection between the handpiece and the abrasive disk, allowing the dentist or dental hygienist to perform tasks effectively and safely. This makes mandrels a vital tool in dental practices, especially when precision and control are paramount.

Other devices mentioned in the choices, such as chucks, collets, or clamps, serve different purposes. Chucks typically hold drills or bur attachments, collets are used to grip or secure tools in various machinery, and clamps might assist in holding or securing objects in place but are not specifically designated for abrasive disks in handpieces. Understanding the unique role of the mandrel helps clarify its importance in dental procedures.