Abstract: The method is for producing porous calcium deficient hydroxyapatite granules and comprises the following steps: (a) subjecting granules of calcium sulfate anhydrous (CSA), calcium sulfate dihydrate (CSD) or calcium sulfate hemihydrate (CSH), the granules comprising interconnected pores with a minimum mean diameter of 3 microns, to a first incubation in an alkaline aqueous solution having a pH-value of less than 10 and containing PO43? ions; (b) subjecting the granules to a second incubation in an alkaline aqueous solution having a pH-value of more than 10 and optionally PO43? ions; (c) filtering and drying the obtained porous granules of calcium deficient hydroxyapatite; and wherein (d) the sum of the amounts of PO43? ions present in the first and second incubation is at least as large as the amount of SO42? ions of the granules used for step (a).

Abstract: The method is for producing porous calcium deficient hydroxyapatite granules and comprises the following steps: (a) subjecting granules of calcium sulfate anhydrous (CSA), calcium sulfate dihydrate (CSD) or calcium sulfate hemihydrate (CSH) to an incubation in an alkaline aqueous solution having a pH-value of less than 10 and containing PO43? ions; whereby the granules of calcium sulfate anhydrous (CSA), calcium sulfate dihydrate (CSD) or calcium sulfate hemihydrate (CSH) comprise interconnected pores with a minimum mean diameter of 3 microns; (b) washing with water the granules obtained after incubation of step a); (c) drying the obtained porous granules of calcium deficient hydroxyapatite; whereby (d) the amount-of PO43? ions present in the incubation of step a) is at least as large as the amount of SO42? ions of the granules used for step (a).

Abstract: The method is for producing porous calcium deficient hydroxyapatite granules and comprises the following steps: (a) subjecting granules of calcium sulfate anhydrous (CSA), calcium sulfate dihydrate (CSD) or calcium sulfate hemihydrate (CSH), the granules comprising interconnected pores with a minimum mean diameter of 3 microns, to a first incubation in an alkaline aqueous solution having a pH-value of less than 10 and containing PO43? ions; (b) subjecting the granules to a second incubation in an alkaline aqueous solution having a pH-value of more than 10 and optionally PO43? ions; (c) filtering and drying the obtained porous granules of calcium deficient hydroxyapatite; and wherein (d) the sum of the amounts of PO43? ions present in the first and second incubation is at least as large as the amount of SO42? ions of the granules used for step (a).

Abstract: The method is for producing porous calcium deficient hydroxyapatite granules and comprises the following steps: (a) subjecting granules of calcium sulfate anhydrous (CSA), calcium sulfate dihydrate (CSD) or calcium sulfate hemihydrate (CSH) to an incubation in an alkaline aqueous solution having a pH-value of less than 10 and containing PO43? ions; whereby the granules of calcium sulfate anhydrous (CSA), calcium sulfate dihydrate (CSD) or calcium sulfate hemihydrate (CSH) comprise interconnected pores with a minimum mean diameter of 3 microns; (b) washing with water the granules obtained after incubation of step a); (c) drying the obtained porous granules of calcium deficient hydroxyapatite; whereby (d) the amount-of P43? ions present in the incubation of step a) is at least as large as the amount of SO42? ions of the granules used for step (a).

Abstract: The method is for producing porous calcium deficient hydroxyapatite granules and comprises the following steps: (a) subjecting granules of calcium sulfate anhydrous (CSA), calcium sulfate dihydrate (CSD) or calcium sulfate hemihydrate (CSH) to an incubation in an alkaline aqueous solution having a pH-value of less than 10 and containing PO43? ions; whereby the granules of calcium sulfate anhydrous (CSA), calcium sulfate dihydrate (CSD) or calcium sulfate hemihydrate (CSH) comprise interconnected pores with a minimum mean diameter of 3 microns; (b) washing with water the granules obtained after incubation of step a); (c) drying the obtained porous granules of calcium deficient hydroxyapatite; whereby (d) the amount-of PO43? ions present in the incubation of step a) is at least as large as the amount of SO42? ions of the granules used for step (a).

Abstract: The method is for producing porous calcium deficient hydroxyapatite granules and comprises the following steps: (a) subjecting granules of calcium sulfate anhydrous (CSA), calcium sulfate dihydrate (CSD) or calcium sulfate hemihydrate (CSH), the granules comprising interconnected pores with a minimum mean diameter of 3 microns, to a first incubation in an alkaline aqueous solution having a pH-value of less than 10 and containing PO43? ions; (b) subjecting the granules to a second incubation in an alkaline aqueous solution having a pH-value of more than 10 and optionally PO43? ions; (c) filtering and drying the obtained porous granules of calcium deficient hydroxyapatite; and wherein (d) the sum of the amounts of PO43? ions present in the first and second incubation is at least as large as the amount of SO42? ions of the granules used for step (a).

Abstract: The invention relates to a bone substitute (1) comprising A) a container (2) made of a porous casing (4) which is at least partly provided with openings; and B) a plurality of filler elements (5) which are not connected to one another and which are enclosed in the container (2); wherein C) the filler elements (5) consist of interconnected particles with an average diameter Dp; and D) the openings of the casing (4) are interconnected pores or channels with an average diameter of DM.

Abstract: The method is for producing porous calcium deficient hydroxyapatite granules and comprises the following steps: (a) subjecting granules of calcium sulfate anhydrous (CSA), calcium sulfate dihydrate (CSD) or calcium sulfate hemihydrate (CSH) to an incubation in an alkaline aqueous solution having a pH-value of less than 10 and containing PO43? ions; whereby the granules of calcium sulfate anhydrous (CSA), calcium sulfate dihydrate (CSD) or calcium sulfate hemihydrate (CSH) comprise interconnected pores with a minimum mean diameter of 3 microns; (b) washing with water the granules obtained after incubation of step a); (c) drying the obtained porous granules of calcium deficient hydroxyapatite; whereby (d) the amount-of PO43? ions present in the incubation of step a) is at least as large as the amount of SO42? ions of the granules used for step (a).

Abstract: The method is for producing porous calcium deficient hydroxyapatite granules and comprises the following steps: (a) subjecting granules of calcium sulfate anhydrous (CSA), calcium sulfate dihydrate (CSD) or calcium sulfate hemihydrate (CSH), the granules comprising interconnected pores with a minimum mean diameter of 3 microns, to a first incubation in an alkaline aqueous solution having a pH-value of less than 10 and containing PO43? ions; (b) subjecting the granules to a second incubation in an alkaline aqueous solution having a pH-value of more than 10 and optionally PO43? ions; (c) filtering and drying the obtained porous granules of calcium deficient hydroxyapatite; and wherein (d) the sum of the amounts of PO43? ions present in the first and second incubation is at least as large as the amount of SO42? ions of the granules used for step (a).

Abstract: A calcium phosphate cement composition that includes the following two components: A) one or several calcium phosphate powders suspended in an aqueous solution including inhibitor cations inhibiting a reaction of the calcium phosphate powders with water, the inhibitor cations being selected from Mg2+, Sr2+ and Ba2+ at a concentration greater than 0.01 M; and B) an aqueous solution including Ca2+ cations at a concentration greater than 0.1 M. This calcium phosphate cement compositions can be safely stored for years yet still retain its full reactivity when mixed.

Abstract: A calcium phosphate cement composition that includes the following two components: A) one or several calcium phosphate powders suspended in an aqueous solution including inhibitor cations inhibiting a reaction of the calcium phosphate powders with water, the inhibitor cations being selected from Mg2+, Sr2+ and Ba2+ at a concentration greater than 0.01 M; and B) an aqueous solution including Ca2+ cations at a concentration greater than 0.1 M. This calcium phosphate cement compositions can be safely stored for years yet still retain its full reactivity when mixed.

Abstract: A bone graft substitute in the form of an implantable three-dimensional scaffold that includes calcium phosphate and has pores. The scaffold is impregnated with a calcium and/or phosphate containing substance, and the dissolution rate DRS of the scaffold is slower than the dissolution rate DRD of the calcium and/or phosphate containing substance.

Abstract: The invention relates to a bone substitute (1) comprising A) a container (2) made of a porous casing (4) which is at least partly provided with openings; and B) a plurality of filler elements (5) which are not connected to one another and which are enclosed in the container (2); wherein C) the filler elements (5) consist of interconnected particles with an average diameter DP; and D) the openings of the casing (4) are interconnected pores or channels with an average diameter of DM.

Abstract: The bone repair material comprises the following components: A) a first granular component with a diameter larger than 20 ?m chosen from the group of: calcium phosphate, calcium pyrophosphate, or calcium sulfate dihydrate; B) a second component chosen from the group of apatite powder with a particle diameter smaller than 1 ?m, (preferably smaller than 100 nm); and B) a third component comprising water or an aqueous solution, whereby C) the volume fraction of the second and third component represents at least 35 volume-% of the total bone repair material.

Abstract: A kneadable and moldable bone-replacement material includes a mixture of calcium-containing ceramic particles and a hydrogel or a substance which can be swelled into a hydrogel. The ceramic particles are of fully synthetic origin and the individual ceramic particles have a structure which is at least partially cohesive and porous. In addition, the majority of the ceramic particles have a non-spheric shape.

Abstract: A bone graft substitute in the form of an implantable three-dimensional scaffold that includes calcium phosphate and has pores. The scaffold is impregnated with a calcium and/or phosphate containing substance, and the dissolution rate DRS of the scaffold is slower than the dissolution rate DRD of the calcium and/or phosphate containing substance.

Abstract: A kneadable and moldable bone-replacement material includes a mixture of calcium-containing ceramic particles and a hydrogel or a substance which can be swelled into a hydrogel. The ceramic particles are of fully synthetic origin and the individual ceramic particles have a structure which is at least partially cohesive and porous. In addition, the majority of the ceramic particles have a non-spheric shape.

Abstract: A kneadable and moldable bone-replacement material includes a mixture of calcium-containing ceramic particles and a hydrogel or a substance which can be swelled into a hydrogel. The ceramic particles are of fully synthetic origin and the individual ceramic particles have a structure which is at least partially cohesive and porous. In addition, the majority of the ceramic particles have a non-spheric shape.

Abstract: A bone graft substitute in the form of an implantable three-dimensional scaffold that includes calcium phosphate and has pores. The scaffold is impregnated with a calcium and/or phosphate containing substance, and the dissolution rate DRS of the scaffold is slower than the dissolution rate DRD of the calcium and/or phosphate containing substance.

Abstract: Calcium phosphate particles having A) a specific surface area (SSA) larger than 0.1 m2/g; B) a mean diameter smaller than 5 mm; C) a Ca/P molar ratio superior to 0.95; and wherein D) said particles have been subjected as a last processing step to a heat treatment at a temperature superior to 400° C. for a period of time such that the specific surface area (SSA) of said particles after the heat treatment is not decreased by more than 10% compared to the SSA before said heat treatment.