Patent ID: 8784551
Filing Date: 2014-07-22
Classification: A61L,C04B

Abstract:
1. A bone cement composition comprising a powder component and a setting liquid component with a liquid to powder ratio of 0.20 cc/g to 0.50 cc/g, wherein the powder component comprises a calcium sulfate source and a calcium phosphate source with a weight ratio of the calcium sulfate source less than 65%, based on the total weight of the calcium sulfate source and the calcium phosphate source, and the setting liquid component comprises ammonium ion (NH 4 + ) in a concentration of about 0.5 M to 4 M, wherein the calcium phosphate source comprises tetracalcium phosphate (TTCP) and dicalcium phosphate in a molar ratio of TTCP to dicalcium phosphate of about 0.5 to about 2.5, and the calcium sulfate source is calcium sulfate hemihydrate (CSH), calcium sulfate dehydrate (CSD), or anhydrous calcium sulfate.