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    • 61. 发明申请
    • Implant depots to deliver growth factors to treat avascular necrosis
    • 植入物仓库以递送生长因子来治疗无血管性坏死
    • US20070259018A1
    • 2007-11-08
    • US11595087
    • 2006-11-09
    • William F. McKay
    • William F. McKay
    • A61K38/18A61F2/02
    • A61L27/227A61K9/0024A61L27/24A61L27/46A61L27/54A61L27/56A61L2300/414A61L2300/604C08L89/06
    • The present invention relates to the design and composition of a depot implant for optimal delivery of growth factors to treat bone avascular necrosis, in that such depot implant is constructed to be in a cylinder (rod) or sphere shape and have a natural or synthetic polymer scaffold with or without impregnated calcium phosphate particles. The density of the depot is higher than a typical BMP sponge carrier to facilitate it's implantation and slower release of the growth factor. The scaffold is such that it has adequate porosity and pore size to facilitate growth factor seeding and diffusion throughout the whole of the bone structure resulting in increased new blood vessel growth and density in the avascular necrotic bone. In addition, the shape of the depot implant allows for delivery through a cannula or large bore needle.
    • 本发明涉及用于最佳递送生长因子以治疗骨无血管性坏死的贮库植入物的设计和组成,因为这种储存植入物构造为圆柱体(棒)或球形,并且具有天然或合成聚合物 含有或不含浸渍磷酸钙颗粒的支架。 仓库的密度高于典型的BMP海绵载体,以便于其植入和较慢释放生长因子。 支架具有足够的孔隙度和孔径以促进整个骨结构中的生长因子接种和扩散,导致无血管坏死骨中新血管生长和密度增加。 此外,储库植入物的形状允许通过套管或大孔针进行输送。