Which of the following instruments is classified as a powered cutting instrument?

The classification of bone reamers as powered cutting instruments is accurate because they utilize an external power source to enhance their cutting ability, making them effective in orthopedic procedures. Bone reamers are typically employed to expand or shape bone cavities, which requires a controlled and efficient cutting process that powered means can provide. This power allows for greater precision and reduces the physical strain on the surgeon, especially during lengthy procedures or when working with dense bone tissue.

In contrast, scissors, forceps, and scalpels are manually operated instruments. Scissors cut tissue through a mechanical action of their blades, forceps grasp and manipulate tissues but do not cut, and scalpels are sharp blades used for incisions that require manual force. While all these instruments play critical roles in surgical procedures, they do not fall under the category of powered cutting instruments like bone reamers do.