Patent ID: 6387980
Filing Date: 2002-05-14
Classification: A61K

Abstract:
A dental composition system, comprising:a liquid composition in a first container and a powder composition in a second container, said liquid composition comprising a polymerizable compound, a photoinitiator, and a first part of a redox polymerization catalyst system, said powder composition comprising filler powder and a second part of said redox polymerization catalyst system, said powder being stored in said second container and said liquid being stored in said first container for at least two weeks and a first portion of said powder being mixed with a first portion of said liquid to form a first polymerizable mixture, said polymerizable compound in said first polymerizable mixture polymerizing within 20 minutes of said mixing to form a first polymeric material having a flexural strength of at least 50 MPa, a second portion of said liquid being exposed to actinic light and polymerizing within 40 seconds of said exposing to form a second polymeric material having an expansion in water at 37Â° C. after 7 days of less than 1 percent by volume.