Rapid-hardening calcium phosphate cement compositions
First Claim
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1. 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, P-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.
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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.
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Citations
29 Claims
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1. A composition of matter for dental restoration and bone implants and restoration comprising:
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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, P-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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 14, 28, 29)
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8. A composition of matter for dental restoration and bone implants and restoration comprising:
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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. - View Dependent Claims (9, 10, 11, 12, 13)
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15. A composition of matter for dental restoration and bone implants and restoration comprising:
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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
a concentrated acid solution. - View Dependent Claims (17, 18, 19, 20, 21)
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16. The composition of claim 16, wherein the concentrated acid solution is selected from the group consisting of hydrochloric acid, nitric acid, phosphoric acid, acetic acid, glycerolphosphoric acid, and combinations thereof.
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22. A composition of matter for dental restoration and bone implants and restoration comprising:
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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
a solution of a salt where the cationic component(s) is not calcium and one or more of the anionic component(s) form (i) strong calcium complexes in the solution or (ii) insoluble salts with calcium. - View Dependent Claims (23, 24, 25, 26, 27)
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Specification