The correct answer regarding the temperature and duration required for the heated ethylene oxide sterilization method is that it operates at 120 degrees for 2 to 3 hours. Ethylene oxide is a gaseous chemical sterilant commonly used for sterilizing heat-sensitive medical devices and equipment.
This method is effective at this specific temperature range because the heat increases the activity of ethylene oxide, enhancing its ability to penetrate materials and effectively kill microorganisms, including bacteria, viruses, and spores. The duration of 2 to 3 hours ensures that the sterilant has enough time to thoroughly permeate the materials, allowing for complete sterilization without damaging the items being processed.
In contrast, the other options present temperature and time combinations that fall outside the established optimal parameters for ethylene oxide sterilization, leading to less effective sterilization or potential damage to instruments. Understanding the precise conditions for this method is crucial for ensuring safe and effective sterilization practices in dental and medical settings.