公开(公告)号：US20070233073A1

公开(公告)日：2007-10-04

申请号：US11366643

申请日：2006-03-02

申请人： Paul Wisnewski ,  Joseph Lessar ,  Dennis Buchanan

发明人： Paul Wisnewski ,  Joseph Lessar ,  Dennis Buchanan

IPC分类号： A61F2/30

CPC分类号： A61B17/7019 ,  A61B5/042 ,  A61B17/7002 ,  A61B17/7029 ,  A61B17/7032 ,  A61B2017/00004 ,  A61L31/148 ,  A61N1/056 ,  A61N1/3716

摘要： A spinal rod characterized by a time-varying stiffness. The rod comprises a first member and at least one second member that is mechanically coupled to the first member through a time-varying interface. The interface features a binding mechanism that degrades after surgical installation. For instance, the interface may be bioabsorbable and dissolve upon exposure to bodily fluids. In another instance, the second member may be comprised of a bioabsorbable material. In another embodiment, the interface may fail under cyclic loading. In another embodiment, degradation of the bioabsorbable material may be inhibited through the application of a current source. The second member may be disposed within the first member. Alternatively, the first member and the second member may be disposed aside one another. The first member and the second member may be substantially similar in shape. One or more bioabsorbable caps may be used to at least temporarily seal the second member from bodily fluids once the spinal rod is installed.

摘要翻译： 具有时变刚度特征的脊柱杆。 杆包括第一构件和至少一个第二构件，其通过时变界面机械地联接到第一构件。 界面具有手术安装后降解的结合机制。 例如，界面可以是生物可吸收的并且在暴露于体液时溶解。 在另一种情况下，第二构件可以由生物可吸收材料构成。 在另一个实施例中，界面可能在循环加载下失效。 在另一个实施方案中，可通过施加电流源来抑制生物可吸收材料的降解。 第二构件可以设置在第一构件内。 或者，第一构件和第二构件可以彼此搁置。 第一构件和第二构件的形状可以基本相似。 一旦一个或多个生物可吸收帽可用于至少临时密封第二构件与体液一旦脊柱杆安装。