Local anesthesia is used for simpler procedures like a cavity filling, which requires a shorter time to complete and is generally less complicated.

You will be conscious and able to communicate when you get a local anesthetic. The area will be numb, so you won’t feel pain.  Most local anesthetics take effect quickly (within 10 minutes) and last 30 to 60 minutes.

They can be used topically (applied directly to the affected area to numb) or injected into the area to be treated. Sometimes, light sedation is added to local anesthetics to help relax a person.