Wednesday, August 04, 2010

US Patent 7767226 - Calcium sulfate nanoparticles for bone repair

Existing bone grafting material suffer from problems of scarcity and the possibility of triggering immune response. In order to overcome these deficiencies this patent from the State University of New York teaches a bone repair material based on calcium sulfate nanoparticles. Claim 1 reads:

1. A method for facilitating repair of a damaged area of bone comprising:

i) providing a composition comprising hemihydrate calcium sulfate particles, wherein at least 50% of the particles of hemihydrate calcium sulfate in the composition have a diameter of from 50 nanometers (nm) to 500 nm;

ii) mixing the composition with an aqueous solution to obtain a paste;

iii) applying the paste to the damaged area of bone; and

iv) allowing the paste to set to facilitate repair of the damaged area of bone.