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    • 9. 发明公开
    • METHOD FOR PRODUCING POROUS CALCIUM DEFICIENT HYDROXYAPATITE GRANULES
    • 生产多孔钙缺陷羟基磷灰石颗粒的方法
    • EP3157861A1
    • 2017-04-26
    • EP14741187.0
    • 2014-06-23
    • Mathys AG BettlachBioventus LLC
    • DE GASPARO, AlexVAN GARDEREN, NoémieBOHNER, MarcSEEHERMAN, HowardVANDERPLOEG Eric
    • C01B25/32
    • C01B25/32A61K47/02C01P2004/61C01P2006/16
    • 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 PO
      4
      3- ions; (b) subjecting the granules to a second incubation in an alkaline aqueous solution having a pH-value of more than 10 and optionally PO
      4
      3- ions; (c) filtering and drying the obtained porous granules of calcium deficient hydroxyapatite; and wherein (d) the sum of the amounts of PO
      4
      3- ions present in the first and second incubation is at least as large as the amount of SO
      4
      2- ions of the granules used for step (a). The porous calcium deficient hydroxyapatite granules obtained by the invention may be purposefully used as carriers for biologically active substances in particular for proteins.
    • (a)将无水硫酸钙(CSA),二水合硫酸钙(CSD)或半水合硫酸钙(CSH)的颗粒置于碱性水溶液中孵育,以形成多孔钙缺乏的羟基磷灰石颗粒 具有小于10且包含PO 4 3-离子的pH值; 由此无水硫酸钙(CSA),二水合硫酸钙(CSD)或半水硫酸钙(CSH)的颗粒包含具有最小平均直径3微米的互连孔; (b)用水洗涤步骤a)的温育后获得的颗粒; (c)干燥得到的缺钙羟基磷灰石多孔颗粒; 由此(d)在步骤a)的温育中存在的PO 4 3-离子的量至少与用于步骤(a)的颗粒的SO 4 2-离子的量相同。 本发明获得的多孔缺钙羟基磷灰石颗粒可有目的地用作生物活性物质的载体,特别是用于蛋白质。