An applicator for effecting an intraligamentary injection of a liquid anesthetic into a gingival sulcus of a dental patient, comprising: a hollow body section having a proximally located chamber and a distally located chamber , the proximally located chamber having an internal chamber diameter that tapers in a first section and a second section , the distally located chamber having a constant diameter that is less than the internal chamber diameter of the proximally located chamber , the proximally located chamber being in fluid communication with the distally located chamber with the proximally located chamber being configured to receive a bolus of the liquid anesthetic and the distally located chamber being configured to produce of jet of liquid anesthetic comprising at least a portion of the bolus of the liquid anesthetic received by the proximally located chamber ; an elongated tip disposed on a distal end of the body section ; a passageway extending through the elongated tip between the chamber of the body member at a proximal end of the elongated tip and the distal end of the elongated tip , the passageway forming an opening at the distal end of the elongated tip , the passageway having an internal passageway diameter less than the internal chamber diameter of the distally located chamber ; and a coupling for securing the body section to a source of liquid anesthetic ; characterised in that the elongated tip is substantially rectangular in cross-section, in that a width of the elongated tip is greater than a thickness of the elongated tip and in that the elongated tip has a distal end that is rounded and flexible to facilitate an atraumatic entry of the elongated tip into the gingival sulcus. a hollow body section having a proximally located chamber and a distally located chamber , the proximally located chamber having an internal chamber diameter that tapers in a first section and a second section , the distally located chamber having a constant diameter that is less than the internal chamber diameter of the proximally located chamber , the proximally located chamber being in fluid communication with the distally located chamber with the proximally located chamber being configured to receive a bolus of the liquid anesthetic and the distally located chamber being configured to produce of jet of liquid anesthetic comprising at least a portion of the bolus of the liquid anesthetic received by the proximally located chamber ; an elongated tip disposed on a distal end of the body section ; a passageway extending through the elongated tip between the chamber of the body member at a proximal end of the elongated tip and the distal end of the elongated tip , the passageway forming an opening at the distal end of the elongated tip , the passageway having an internal passageway diameter less than the internal chamber diameter of the distally located chamber ; and a coupling for securing the body section to a source of liquid anesthetic ; characterised in that the elongated tip is substantially rectangular in cross-section, in that a width of the elongated tip is greater than a thickness of the elongated tip and in that the elongated tip has a distal end that is rounded and flexible to facilitate an atraumatic entry of the elongated tip into the gingival sulcus. <EOS>