Patent ID: 8088838
Filing Date: 2012-01-03
Classification: A61K

Abstract:
1. A cone material in endodontic treatment, comprising: a thermoplastic polyurethane which is formed by (a) isophorone diisocyanate (IPDI) or hexamethylene diisocyanate (HDI), (b) poly(butyleneadipate) glycol (PBA), wherein the molecular weight of poly(butyleneadipate)glycol (PBA) is about 2000, and (c) chain extender, wherein the molar ratio of PBA to the diisocyanate is equal to or more than 0.8; and a filler selected from the group consisting of zinc oxide (ZnO) and fluoroaluminosilicate glass; wherein the tensile strength of the cone material is equal to or more than 10 MPa and the Young's Modulus of the cone material is equal to or more than 90 MPa.