Rapid-hardening calcium phosphate cement compositions
AssigneeADA Foundation
InventorsLaurence C. Chow, Shozo Takagi
Life of this patent
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Abstract
A bone or dental implant material in the form of a paste includes a mixture of calcium phosphate and/or calcium-containing powders and a solution that is (1) an acidic calcium phosphate solution saturated with respect to one or more calcium phosphate compounds, (2) a concentrated acid solution, or (3) salt solutions with a cationic component other than calcium. The paste is stable, resistant to washout and will form hydroxyapatite and harden relatively rapidly to a cement.
Claims16
A composition of matter for dental restoration and bone implants and restoration comprising:
- a powdered calcium compound including one or more calcium phosphate salts selected from the group consisting of monocalcium phosphate monohydrate, monocalcium phosphate anhydrous, dicalcium phosphate anhydrous, dicalcium phosphate dihydrate, octacalcium phosphate, α-tricalcium phosphate, β-tricalcium phosphate, amorphous calcium phosphate, hydroxyapatite, tetracalcium phosphate and combinations thereof;
- and
- an acidic calcium phosphate solution saturated with respect to monocalcium phosphate monohydrate, monocalcium phosphate anhydrous or combinations thereof.
A composition of matter for dental restoration and bone implants and restoration comprising:
- a powdered calcium compound including one or more calcium phosphate salts selected from the group consisting of monocalcium phosphate monohydrate, monocalcium phosphate anhydrous, dicalcium phosphate anhydrous, dicalcium phosphate dihydrate, octacalcium phosphate, α-tricalcium phosphate, β-tricalcium phosphate, amorphous calcium phosphate, hydroxyapatite, tetracalcium phosphate and combinations thereof;
- and
- an acidic calcium phosphate solution saturated with respect to dicalcium phosphate dihydrate, dicalcium phosphate anhydrous and combinations thereof.
Dependencies are inferred from the claim text.