| 发明名称 | Methods related to seating of bearing component on tibial tray | ||
| 摘要 | A tibial prosthesis has a bearing component configured for an anterior-medial insertion, which advantageously avoids the extensor mechanism of the knee. A tibial tray may include a banana-shaped boss that corresponds to a notch formed in the bearing component. After the bearing component is inserted along the anterior-medial path, the boss is received within the notch by rotating the bearing component with respect to the tibial tray. This rotation seats the bearing component upon the tibial tray in the manner of a fixed-bearing prosthesis. Alternatively, the boss and notch may define angled central axes which allow straight anterior-medial insertion of the bearing component and locking engagement to the tibial tray. | ||
| 申请公布号 | US9283082(B2) | 申请公布日期 | 2016.03.15 |
| 申请号 | US201414284144 | 申请日期 | 2014.05.21 |
| 申请人 | Zimmer, Inc. | 发明人 | Sanford Adam H.;Byrd Brian D.;Annayappa Ramesh;VanDiepenbos Jeffery A. |
| 分类号 | A61F2/38;A61F2/30 | 主分类号 | A61F2/38 |
| 代理机构 | Schwegman Lundberg & Woessner, P.A. | 代理人 | Schwegman Lundberg & Woessner, P.A. |
| 主权项 | 1. A method of inserting a bearing component onto a tibial tray implanted on a knee, the method comprising: positioning the tibial tray within the knee via an incision, the tibial tray having a support surface sized to receive the bearing component and a boss projecting proximally from the support surface; inserting the bearing component, while avoiding an extensor mechanism of the knee, through the incision in an anterior-medial insertion direction to position a distal surface of the bearing component atop the support surface of the tibial tray, the bearing component having a notch formed in the distal surface and configured to receive the boss of the tibial tray; rotating the bearing component about an axis of rotation positioned laterally of an anterior-posterior midline of the tibial tray to move the bearing component to a final seated position on the tibial tray, wherein the boss of the tibial tray includes a rail, the notch of the bearing component includes a groove, and the step of rotating the bearing component about an axis of rotation includes a portion of the rail being received in the groove formed in the notch; wherein subsequent rotation of the bearing component results in an interference fit between the rail of the boss and the groove of the notch. | ||
| 地址 | Warsaw IN US | ||