This disclosure relates to dental anesthetic delivery devices and associated methods for using the same. In certain embodiments, an anesthetic delivery device may comprise a pressure-driven needleless injector configured to deliver anesthetic deeply into the gingiva, allowing for a deep numbing and anesthetic effect and reducing pain from subsequent anesthetic injections and/or dental procedures. In some embodiments, the anesthetic delivery device may be T-shaped allowing for a shorter longitude axis length of the syringe body, improved clinician view of the oral cavity during use, single hand and/or ambidextrous use, and/or improved control during positioning.