Bone substitute composition
First Claim
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1. A composition comprising:
- a) at least one calcium phosphate component in the form of a powder capable of being hardened into a cement when contacted with an aqueous liquid;
b) at least one hardened particulate calcium sulfate dihydrate component containinga prophylactic or therapeutic amount of at least one water soluble bioactive agent, wherein said at least one hardened particulate calcium sulfate dihydrate component is present in an amount ranging from 10 wt % to 60 wt % of said composition and has a particle diameter of less than 100 μ
m; and
c) at least one accelerator chosen from disodium hydrogen phosphate (Na2HPO4), calcium phosphate cement, precipitated hydroxyapatite (PHA), and calcium deficient hydroxyapatite (CDHA), or a mixture thereof, andwherein the at least one hardened particulate calcium sulfate dihydrate component is prepared according to a process comprising reacting calcium sulfate hemihydrate, the at least one water soluble bioactive agent, and water.
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Abstract
An injectable bone mineral substitute material composition with the capability of being hardened in a body fluid in vivo, which comprises at least one calcium phosphate component and at least one calcium sulfate component as a dry mixture mixed with an aqueous liquid, and at least one accelerator, the at least one calcium sulfate component being particulate hardened calcium sulfate, which has a specified particle size that is in order to confer injectability to the composition. The invention also concerns the bone mineral substitute material produced from the composition as well as methods and uses thereof.
139 Citations
36 Claims
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1. A composition comprising:
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a) at least one calcium phosphate component in the form of a powder capable of being hardened into a cement when contacted with an aqueous liquid; b) at least one hardened particulate calcium sulfate dihydrate component containing a prophylactic or therapeutic amount of at least one water soluble bioactive agent, wherein said at least one hardened particulate calcium sulfate dihydrate component is present in an amount ranging from 10 wt % to 60 wt % of said composition and has a particle diameter of less than 100 μ
m; andc) at least one accelerator chosen from disodium hydrogen phosphate (Na2HPO4), calcium phosphate cement, precipitated hydroxyapatite (PHA), and calcium deficient hydroxyapatite (CDHA), or a mixture thereof, and wherein the at least one hardened particulate calcium sulfate dihydrate component is prepared according to a process comprising reacting calcium sulfate hemihydrate, the at least one water soluble bioactive agent, and water. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method of preparing an injectable composition comprising contacting
at least one calcium phosphate component; -
at least one hardened particulate calcium sulfate dihydrate component containing a prophylactic or therapeutic amount of at least one water soluble bioactive agent, wherein said at least one hardened particulate calcium sulfate dihydrate component is present in an amount ranging from 10 wt % to 60 wt % of the total weight of the components other than the aqueous liquid before said combination and has a particle diameter of less than 100 μ
m; andat least one accelerator chosen from disodium hydrogen phosphate (Na2HPO4), calcium phosphate cement, precipitated hydroxyapatite (PHA), and calcium deficient hydroxyapatite (CDHA), or a mixture thereof, with an aqueous liquid, wherein the resulting composition is in the form of an injectable composition, and wherein the at least one hardened particulate calcium sulfate dihydrate component is prepared according to a process comprising reacting calcium sulfate hemihydrate, the at least one water soluble bioactive agent, and water. - View Dependent Claims (20, 21, 22)
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23. A system comprising:
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(a) a first unit comprising at least one calcium phosphate component, at least one hardened particulate calcium sulfate dihydrate component containing at least one water soluble bioactive agent, and at least one accelerator chosen from disodium hydrogen phosphate (Na2HPO4), calcium phosphate cement, precipitated hydroxyapatite (PHA), and calcium deficient hydroxyapatite (CDHA), or a mixture thereof, wherein said at least one hardened particulate calcium sulfate dihydrate component is present in an amount ranging from 10 wt % to 60 wt % of said composition of said first unit and has a particle diameter of less than 100 μ
m; andwherein the at least one hardened particulate calcium sulfate dihydrate component is prepared according to a process comprising reacting calcium sulfate hemihydrate, the at least one water soluble bioactive agent, and water; and (b) a second unit comprising an aqueous liquid, wherein the composition of said first unit and the liquid of said second unit are not in contact. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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Specification