Patent ID: 7226288
Filing Date: 2007-06-05
Classification: A61C

Abstract:
1. A method for irrigating a root canal of a tooth having a coronal end and an apex end, said canal having been shaped after removal of pulp material, said method comprising: a.) inserting cannula into the coronal end of the canal such that an end of said cannula is disposed partway within said canal, said end of said cannula having an opening: b.) performing an evacuation of a coronal portion of the root canal by applying a vacuum to the cannula; c.) placing a fluid delivery tube adjacent the coronal end of the canal; d.) supplying a fluid to said fluid delivery tube wherein the fluid is drawing to said opening of the cannula, said fluid being withdrawn from said canal by operation of said vacuum; e.) removing the fluid delivery tube and cannula and inserting a microcannula in the canal, said microcannula having a smaller diameter than said cannula and sized so as to enable insertion of microcannula substantially completely to said apex end, said micro-cannula being closed at said apex end and positioned such that a side vent of said microcannula is adjacent said apex end; f.) performing an evacuation of an apical portion of the root canal by applying a vacuum to said cannula and delivering fluid to said microcannula wherein the fluid is drawn from said side vent of the microcannula and is withdrawn from said canal by operation of said vacuum through said cannula.