What tool would be used to eliminate gingival overhangs during the finishing of an amalgam restoration?

The finishing bur is specifically designed for making fine adjustments and refining the surface of restorations, including amalgam restorations. This tool has a unique shape and grit that allows for a controlled reduction of material. Its precision aids in eliminating gingival overhangs, which are excess materials that can negatively impact both the aesthetics and health of the surrounding gingival tissue.

Finishing burs typically have a higher number of cutting edges and a finer grit compared to other instruments, making them ideal for smoothing and shaping the margins of restorations. Properly using a finishing bur allows an Expanded Function Dental Assistant to achieve a seamless transition between the restoration and the tooth structure, ensuring that there are no sharp edges or rough areas that could irritate the gum tissue.

Other tools like strip burs, green stones, and white stones serve different purposes in dental procedures. For instance, strip burs are often used for refining and finishing interproximal areas but may not be as effective in removing gingival overhangs specifically. Green stones and white stones are primarily used for contouring and polishing rather than for eliminating overhangs. Therefore, in the context of the question, the finishing bur stands out as the best tool for this specific task.