Infiltration Anesthesia in Dentistry: How Local Numbing Works

Infiltration anesthesia is the simplest and most common type of dental injection. The anesthetic solution is deposited near the tip of the tooth root, where it diffuses through the bone to reach the nerve supplying that tooth. Infiltration works particularly well in the upper jaw, where the bone is thinner and more porous. In the lower jaw, bone is denser, so nerve blocks are often needed instead.

When administered by trained, credentialed providers with appropriate monitoring equipment, dental sedation has an excellent safety record. The risk of serious complications is very low. A pre-sedation health evaluation identifies patients at higher risk so that appropriate precautions can be taken.

Your dental provider will recommend the appropriate sedation level based on your anxiety, the type and duration of the procedure, and your medical history. Mild anxiety may only need nitrous oxide. Moderate anxiety or longer procedures may warrant oral or IV sedation. Severe phobia or extensive work may require general anesthesia.

For nitrous oxide alone, no driver is needed. For oral sedation, IV sedation, and general anesthesia, you must have a responsible adult drive you home and supervise you for the rest of the day.

Costs range from $50 to $200 for nitrous oxide, $150 to $500 for oral sedation, $250 to $1,000 for IV sedation, and $500 to $2,000 or more for general anesthesia. Insurance coverage varies and often depends on medical necessity.

Yes. If dental anxiety prevents you from getting care, sedation is a valid and appropriate option regardless of the procedure complexity. Discuss your concerns openly with your provider. If your current provider does not offer sedation, they can refer you to one who does.