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

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

In order for the topical to anesthetize terminal nerve endings to a depth of 2-3mm it is imperative that a large amount is applied to the tissue.

Which of the following terms that happens to the nerve impulse would be similar to crimping a hose?

Saltatory conduction is defined as the:

The deposition site is defined as the area of tissue penetration when administering an injection.

The choice of which length and gauge of needle to use should depend on what will be most comfortable for the patient. 

A 25 gauge needle has a larger diameter than a 30 gauge needle.

Which of the following does not meet OSHA standards to prevent needlestick injuries?

Which of the following is a common vasoconstrictor found in local anesthetic cartridges.