Patent ID: 7709029

Claim:
A self hardening, non-aqueous premixed composition of matter comprising: a non-toxic, non-aqueous water-miscible liquid; a gelling agent; a powdered calcium compound in the form of selectively sized powder particles, said particle size in the range of 1 μm to 50 μm, said particles comprising a calcium compound selected from the group consisting of monocalcium phosphate monohydrate, monocalcium phosphate anhydrous, dicalcium phosphate anhydrous, dicalcium phosphate dehydrate, octacalcium phosphate, α-tricalcium phosphate, β-tricalcium phosphate, amorphous calcium phosphate, calcium deficient hydroxyapatite, non-stoichiometric hydroxyapatite, tetracalcium phosphate, CaSO 4 , CaSO 4 .0.5 H 2 O, CaSO 4 .2 H 2 O, CaO, Ca(OH) 2 , CaCO 3 and mixtures thereof; and a carboxylic acid for accelerating hardening of said composition when said composition is exposed to water at a delivery site, said acid comprising an acid selected from the group consisting of glycolic, citric, tartaric, malonic, malic, and maleic acids and combinations thereof; said composition being substantially an anhydrous paste and which forms a self hardening bone and tooth restoration material upon further contact with an aqueous material having a hardening time of less than about 35 minutes and a diametral tensile strength (DTS) greater than 2.7 MPa within 7 days after hardening.