Missouri Expanded Function Dental Assistant (EFDA) Basic Skills Practice Test

Nitrous oxide in dentistry is used primarily for analgesia and sedation. When inhaled in a controlled mixture with oxygen, it helps patients feel less pain and stay calm, making procedures more tolerable. It acts quickly and wears off soon after the gas is stopped, so recovery is fast and patients can resume normal activities shortly after treatment. It doesn’t cause deep anesthesia, and its cardiovascular effects are mild when used properly, so it doesn’t dramatically raise blood pressure. It is not a treatment for infections and does not cure conditions like asthma, so those statements aren’t correct.