Question 27 of 35

That response is not correct.

When administering an IAN, be certain to gently contact bone prior to depositing any solution. This will prevent overinsertion and assure that the needle is not in the parotid gland.

However, remember that the correct depth is 2/3 to 3/4 the length of a long dental needle. If the clinician hasn't contacted bone and is advancing the needle deeper than this, the needle should be withdrawn until only approximately 1/4 its length remains in tissue. Then the syringe barrel should be repositioned more posteriorly so it is over the mandibular molars. The needle should be advanced until it gently contacts bone.

If, on the other hand, the clinician contacts bone prior to being at least 2/3 the length of the needle into the tissue, the needle should be withdrawn slightly, the syringe barrel should be repositioned more anteriorly (over cuspid or lateral incisor, but keeping the syringe on the same side of the mouth as it originally was), and then advancing until bone is contacted.