| 摘要 |
<p>A patellar component (1) for use in conjunction with a prosthetic knee joint of the type comprising a femoral component and a tibial component comprises a metal disc (2) embedded within an ultra-high molecular weight polyethylene disc (3). The polyethylene disc completely surrounds the edge of the metal disc such that the metal disc is flush with the polyethylene disc on one surface of the component. The metal disc may be provided with a knurl or serrations (20) which key into the polyethylene disc to prevent rotation of the two discs. The component (1) is fixed to the patella by means of a central peg (4) and a number of spikes (10).</p> |
