What instrument is used to shape and contour an amalgam restoration for a Class II cavity?

The Wards carver is specifically designed for shaping and contouring amalgam restorations, particularly in Class II cavities. This instrument features a sharp, angled blade that allows the dental professional to refine the surface of the amalgam, ensuring it blends seamlessly with the natural contours of the tooth. The carver can create smooth, precise margins and remove any excess material, which is crucial for maintaining proper occlusion and functionality of the restored tooth.

While other instruments mentioned have their own specific functions, they do not provide the same capability for shaping amalgam restorations. For instance, a burnisher is primarily used to smooth the surface of amalgam after it has been contoured, but it does not possess the means to actively carve and shape the material. An explorer is utilized for detecting caries and assessing restoration margins, and a curette is designed for scaling and root planning, which makes them unsuitable for the task of contouring amalgam in a cavity. Thus, the Wards carver is the correct choice for this particular procedure in dental practice.