Cone material in endodontic treatment
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United States of America Patent
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Jan 3, 2012
Grant Date -
Jun 18, 2009
app pub date -
Feb 26, 2009
filing date -
Jun 20, 2007
priority date (Note) -
Expired
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Abstract
The present invention discloses a cone material in endodontic treatment. The cone material comprises a thermoplastic polyurethane and a filler. The thermoplastic polyurethane is formed by a. isophorone diisocyanate (IPDI) or hexamethylene diisocyanate (HDI), b. poly(butyleneadipate) glycol (PBA) and c. chain extender, wherein the molar ratio of PBA and the diisocyanate is equal to or more than 0.8. By changing the molar composition of the components such as polyol and diisocyanate, physical and chemical property of the disclosed cone material in endodontic treatment can be adjusted.
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