Figure 1-16. Instrument setup for anesthesia.
a. Loading the Syringe. When a disposable needle is used, the plastic hub is
threaded on to the syringe without breaking the seal or removing the outer protective
plastic cylinder. The first step is inserting the proper needle. The next step is to withdraw
the plunger of the syringe and insert the CarpuleTM (cartridge) of the anesthetic. After
inserting the CarpuleTM, release the plunger and secure the barb in the rubber stopper by
striking the thumb ring in the palm of the hand. The protective cylinder may be removed
at the discretion of the dental officer. This usually will be done after the CarpuleTM of
anesthetic solution has been and inserted just before the injection is made. The needle
and hub are discarded after use, following standard precautions, and in accordance with
b. The Injection.
(1) When the dental officer is ready to inject the anesthetic solution, he will
dry the injection area with 2-inch-by-2-inch or 4-inch-by-4-inch gauze. He may then apply
an antiseptic solution to the area with an applicator. The tissue is then ready for the
injection. The specialist may hand each item to the dentist as needed and receive them
from him as each step is accomplished. The dental specialist will be expected to assist
by retracting tissues, reassuring the patient, and observing the patient for signs of fainting
or any other reaction to the anesthetic.