Patent ID: 6139529
Filing Date: 2000-10-31
Classification: A61C

Abstract:
A method of administering a dental anesthetic, comprising:(a) providing an injector device having a needle and a programmable dosage and flow rate;(b) programming the flow rate of the injector device to a predetermined rate of about 0.15 ml/min;(c) topically anesthetizing the tissue surface in the region of puncture and waiting a few seconds for its effect,(d) injecting by hypodermic needle a few drops of anesthetic liquid in the gingival papilla, forming a slightly ischemic pouch,(e) removing the needle and waiting a few seconds for the anesthetic to take effect,(f) reinserting the needle slowly, over a period of about 40 seconds, while effecting a motor-controlled flow rate of about 0.15 ml/minute of introduction of anesthetic liquid into the tissue, such that the anesthetic liquid precedes and has at least partial effect in the tissue in advance of penetration thereof by said needle,(g) contacting, and penetrating the alveolar crest with said needle,(h) re-programming the programmable injector for a flow rate of about 0.3 ml/min, and(i) thereafter injecting about 0.6 ml to about 0.9 ml of the anesthetic, and liquid by motorized expulsion from said needle, at a constant controlled rate of about 0.3 ml per minute.