US Patent No. 9,931,280

DENTAL COMPOSITE COMPOSITIONS FOR REDUCED SHRINKAGE STRESS


Patent No. 9,931,280
Issue Date April 03, 2018
Title Dental Composite Compositions For Reduced Shrinkage Stress
Inventorship Hui Lu, Magnolia, DE (US)
Xiaoming Jin, Middletown, DE (US)
Joachim E. Klee, Radolfzell (DE)
Bernard Koltisko, Milton, DE (US)
Assignee Dentsply Sirona Inc., York, PA (US)

Claim of US Patent No. 9,931,280

1. A dental composite composition comprising a free-radically polymerizable (meth)acrylate resin, 75 percent by weight or greater of filler particles, and about 0.005 percent to about 5 percent by weight of at least one polymerizable stable radical, the dental composite composition having a flexural modulus after polymerization of about 9500 MPa or greater;wherein the polymerizable stable radical reduces shrinkage stress of the dental composite composition caused by polymerization by 10% or greater.