Which of the following local anesthetic blocks requires the needle and syringe barrel angulation to be at 45 degrees within three separate planes during administration?

Which photo shows the correct angle for the PSA injection? A. anesthesia 7.jpg B. local anesthesia 8.jpg

Which of the following anesthetics is associated with methemoglobinemia?

Which injection might the patient feel a “lingual shock” or electric zing in tongue during injection?

Why is this injection labeled as incorrect? There may be more than one answer. local anesthesia 4.jpg

Which of the following is an advantage of having a local anesthetic agent metabolized in the plasma and liver?

You are administering the IA block, and you are at a depth of about 20-25mm and not contacting bone at injection site. Which of the following is the appropriate correction to be made?

Choose the statement that is correct/true.

Needle recapping devices and PPE are an example of which type of prevention?

Epinephrine and Levonordefrin are vasoconstrictors used in dental local anesthetics. Epinephrine is more potent than Levonordefrin.