Which of the following best describes the penetration site for the MSA injection in a patient with a full adult dentition:

For which injection should you leave the needle in place for a few seconds to allow the anesthetic to be absorbed?

The lingual nerve, generally anesthetized in conjunction with the IA, is anesthetized by advancing the needle deeper into the tissue.

Aspiration and slow delivery are two of the most important safety steps in the delivery of local anesthetic.

  After contacting bone at the correct depth for the IA injection, what step do you need to take before you aspirate?

What is the preferred needle length for the maxillary injections?

It is not necessary to contact bone when using a long needle for the IA nerve block because the length of the needle guarantees it will reach the mandibular foramen.

What is the correct depth of needle penetration for the MSA injection:

What are the appropriate injections to give for extraction of tooth # 5?

We use pressure anesthesia when giving palatal injections.  What is the name of the theory of pain perception that has the brain perceiving nerve impulses from a current stimuli, and then is able to lessen the impulses from a subsequent stimuli?