Which chair has a foot bar for support?

The assistant's stool is specifically designed to support the dental assistant in the operatory while enabling easy access to various instruments and materials needed during a procedure. The presence of a foot bar on the assistant's stool allows the assistant to push off and adjust their height comfortably, enabling a better working posture. This feature helps the assistant maintain stability and balance while performing tasks for the dentist, such as passing instruments or providing patient care.

In contrast, the dental chair is primarily designed for patient comfort and positioning, and does not typically include a foot bar for support. The operator's stool may have adjustments for height and mobility, but it usually does not feature a dedicated foot bar like the assistant's stool. Therefore, the correct answer points to the stool designed specifically for the dental assistant's needs, emphasizing ergonomic support during dental procedures.