Bone cement containing coated radiopaque particles and its preparation
    5.
    发明授权
    Bone cement containing coated radiopaque particles and its preparation 有权
    骨水泥含涂层不透射线颗粒及其制备

    公开(公告)号:US07186761B2

    公开(公告)日:2007-03-06

    申请号:US10475374

    申请日:2002-05-28

    摘要: An acrylic radiopaque bone cement for orthopedic use comprises a solid phase composed of a mixture of at least one poly(methyl acrylate)-based polymer, one free-radical polymerization initiator and one or more substances opaque to X-rays, and a liquid phase substantially composed of a mixture of at least one monomer, one accelerator and one stabilizer. The radiopaque substances comprise metallic tungsten and tantalum particles, compounds or mixtures thereof, covered with a polymer coating compatible with said bone cement. The coating layer of the particles of radiopaque substances is an acrylic polymer based on poly(methyl methacrylate). The amount of radiopacifying element is between 1% and 20% by weight, relative to the solid phase, preferably between 2% and 5% by weight, relative to the solid phase. The solid phase may additionally comprise one or more pharmacologically active substances. The method for its preparation consists in preparing the radiopacifying material by coating the metal particles with a layer of a polymer which is compatible with the matrix and exhibits oxygen barrier properties such that said layer does not dissolve completely in the liquid phase so as to keep its oxygen barrier properties at least partly unchanged.

    摘要翻译: 用于骨科用途的丙烯酸不透射线骨水泥包括由至少一种聚(甲基丙烯酸酯)基聚合物,一种自由基聚合引发剂和一种或多种对X射线不透明的物质的混合物组成的固相,以及液相 基本上由至少一种单体,一种促进剂和一种稳定剂的混合物组成。 不透射线的物质包括用与所述骨水泥相容的聚合物涂层覆盖的金属钨和钽颗粒,化合物或其混合物。 不透射线物质的颗粒的涂层是基于聚(甲基丙烯酸甲酯)的丙烯酸类聚合物。 相对于固相,放射性鉴定元素的量相对于固相为1重量%至20重量%,优选相对于固相为2重量%至5重量%。 固相可另外包含一种或多种药理活性物质。 其制备方法在于通过用与基质相容的聚合物层涂覆金属颗粒来制备放射性材料,并显示出阻氧性能,使得所述层不完全溶解在液相中,以保持其 氧阻隔性至少部分不变。