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    • 9. 发明申请
    • BONE SUBSTITUTE AND METHOD FOR THE PREPARATION THEREOF
    • 骨髓取代物及其制备方法
    • US20120076870A9
    • 2012-03-29
    • US12999507
    • 2009-06-26
    • Nadine NassifFrédéric GobeauxMarie-Madeleine Giraud GuilleGervaise Mosser
    • Nadine NassifFrédéric GobeauxMarie-Madeleine Giraud GuilleGervaise Mosser
    • A61K33/42A61P19/08
    • A61L27/46C08L89/06
    • The invention relates to a material that can be used as a bone substitute and to a method for the preparation thereof. The material comprises an organic phase (I) comprising striated collagen fibrils constituted of collagen I triple helices, said fibrils being organized over a large distance according to a 3D geometry associating aligned domains and cholesteric domains, and also isotropic domains where they are not organized; and a mineral phase (II) comprising apatite crystals having a hexagonal crystalline structure, space group 6/m, comprising at least calcium ions and phosphate ions; the axis c of said apatite crystals of the mineral phase is coaligned with the longitudinal axis of the striated collagen fibrils of the organic phase and the collagen content in the material is at least 75 mg/cm3. The method for preparing the material comprises preparing an initial acidic aqueous solution of collagen which is a precursor for the organic phase (I), and at least one aqueous solution of precursors for the mineral phase (II) and precipitating the collagen by increasing the pH to a value of at least 7. According to this method: the concentration of collagen in the acidic aqueous solution is at least 75 mg/ml and remains constant during said increase in pH; the mineral phase precursors comprise at least one calcium salt and at least one phosphate salt; the precipitation of the mineral phase (II) is carried out by bringing the mineral phase precursor solution into contact with the organic phase (I), said bringing into contact being carried out before or after the precipitation of said organic phase (I).
    • 本发明涉及可用作骨替代物的材料及其制备方法。 该材料包括由胶原I三重螺旋构成的条纹胶原原纤维的有机相(I),所述原纤维根据关联对齐的结构域和胆甾醇结构域的3D几何形状,以及它们不组织的各向同性结构域组织在很大的距离上; 和包含六方晶结构的磷灰石晶体的矿物相(II),空间群6 / m,至少包含钙离子和磷酸根离子; 矿物相的所述磷灰石晶体的轴线c与有机相的条纹胶原原纤维的纵向轴线相配合,并且材料中的胶原含量为至少75mg / cm 3。 制备该材料的方法包括制备作为有机相(I)的前体的初始酸性水溶液和至少一种矿物相(II)的前体水溶液,并通过增加pH来沉淀胶原蛋白 至少为7.根据该方法:酸性水溶液中胶原蛋白的浓度至少为75mg / ml,并且在所述增加的pH期间保持恒定; 矿物相前体包含至少一种钙盐和至少一种磷酸盐; 通过使矿物相前体溶液与有机相(I)接触进行矿化相(II)的沉淀,所述接触在所述有机相(I)的沉淀之前或之后进行。