Patent ID: 7665991
Filing Date: 2010-02-23
Classification: A61C

Abstract:
1. An endodontic obturator for filling an endodontically prepared root canal of a tooth, said endodontic obturator comprising: an elongated shaft of a flexible material, said shaft having a distal end, said shaft further having a proximal portion and a distal portion, said distal portion further comprising a tapered part; a layer of filler material coated about the distal portion of the shaft said filler material characterized by a dynamic viscosity at a temperature within an operating range; wherein the dynamic viscosity of a portion of the layer of filler material near the distal end of the shaft is lower than the dynamic viscosity of a portion of the layer of filler material disposed towards the proximal portion of the shaft when the filler material is heated to a temperature within the operating range; wherein the layer of filler material is divided into a distinct first and second portions wherein the first portion extends from the distal end of the shaft to an intermediate point along the tapered part of the shaft and a second portion extends from the intermediate point towards the proximate portion of the shaft, whereby the filler material in the second portion has a higher dynamic viscosity than the filler material in the first portion.