What category of infection control is the use of hand sanitizers classified as in a dental setting?

According to CDC guidelines for dental infection prevention, hand sanitizers and hand hygiene practices are classified as work practice controls. Work practice controls are behavior-based measures that reduce the risk of exposure by changing the way tasks are performed. Engineering controls, by contrast, are technology-based devices that physically remove or isolate a hazard (e.g., sharps containers, self-sheathing needles, rubber dams). Administrative controls involve policies, training, and scheduling changes. Hand sanitizers do not physically isolate a hazard — they change the behavior of the dental healthcare worker, making them a work practice control.