Where are noxious agents expelled to by the scavenging system?

The scavenging system in dental anesthesia is designed to capture and expel noxious agents, primarily anesthetic gases, to ensure a safe environment for both patients and healthcare personnel. The correct answer highlights that these agents are expelled outside the operating room. This is crucial because allowing noxious agents to remain within the operating room could lead to exposure, which can have deleterious health effects over time.

The design of the scavenging systems is specifically aimed at maintaining air quality and minimizing the inhalation of waste gases, thus protecting staff and patients from potential harm. Expelling these agents to the outside reduces the risk of contamination and maintains compliance with safety guidelines and regulations regarding exposure limits for anesthetic gases.