The Incidence of Intravascular Needle Entrance during Inferior Alveolar Nerve Block Injection

Ali Taghavi Zenouz, Hooman Ebrahimi, Masoumeh Mahdipour, Sara Pourshahidi, Parisa Amini & Mahdi Vatankhah
Background and aims. Dentists administer thousands of local anesthetic injections every day. Injection to a highly vascular area such as pterygomandibular space during an inferior alveolar nerve block has a high risk of intravascular needle entrance. Accidental intravascular injection of local anesthetic agent with vasoconstrictor may result in cardiovascular and central nervous system toxicity, as well as tachycardia and hypertension. There are reports that indicate aspiration is not performed in every injection. The aim of...