Process for the preparation of a hydroxyl apatite material
First Claim
1. A process for the preparation of a carbonaceous hydroxyl apatite material by means of hydrothermal conversion, comprising the following steps:
- (a) cleaning a hard tissue from organic substances,(b) converting the tissue with an aqueous concentrated solution of (NH4)2 HPO4 solution at a temperature up to 250°
C.,(c) executing the conversion in an autoclave under saturation steam pressure, and(d) during conversion compensating for the content of Mg2+ -ions by addition of F of ions.
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Abstract
A process is disclosed for the preparation of a hydroxyl apatite material by means of hydrothermal conversion using as starting material a calcitic skeleton which has been purified of organic substances. The conversion is carried out under saturated steam pressure, preferably at a temperature in the range of from 100° C. to 250° C. The influence of the reaction, or rather the defect density of the materials is preferably achieved by the addition of fluoride ions. In addition, the adaption of the material to differing implantation areas as hard tissue replacements as well as the preparation of workable compact implants is described.
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Citations
12 Claims
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1. A process for the preparation of a carbonaceous hydroxyl apatite material by means of hydrothermal conversion, comprising the following steps:
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(a) cleaning a hard tissue from organic substances, (b) converting the tissue with an aqueous concentrated solution of (NH4)2 HPO4 solution at a temperature up to 250°
C.,(c) executing the conversion in an autoclave under saturation steam pressure, and (d) during conversion compensating for the content of Mg2+ -ions by addition of F of ions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification