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Which of the following are routes of delivery of dental local anesthetic drugs?  Choose all that apply.

The red dot at the border of the incisive foramen shows the deposition site for which injection?

Which of the following are part of the safety mechanism of the nitrous oxide delivery system.  Choose all that apply.

Anxiolysis is defined as the use of a medication or drug to relieve anxiety during a procedure.

After assembling the syringe, which of the following is the most important item to check before performing the injection.

Nitrous oxide-oxygen sedation has a positive effect on the heart due to the supplemental oxygen and sedative properties.

Excessive operator exposure to N2O may occur as a result of leaks from the anesthetic delivery system during administration.

Which of the following conditions contraindicates the use of N2O-O2 sedation?

How long is oxygen most often administered at the completion of sedation?

A _________________ aspiration can occur when a bevel is in contact with a vessel wall.  This is why some highly vascular areas require two aspirations.