| 摘要 |
<p>The principle of this endoprosthesis of the knee can also be used in other joints, that require a bearing during movement of the parts, with the aim of reducing wear. This endoprosthesis has improved self-lubrication mechanisms, the ability to filter the particles from the debris produced by the moving parts, and a new viscoelastic behavior under loading which reduce the transmitted forces. This has been achieved with the use of compressible materials (13) and mechanisms [for example between the fixed bearing (25) and the tibial component (24)], allowing the endoprosthesis to have compressibility under loading, which allows it also to receive or create chambers (14) with an exit (26) to the surface articulating with the femoral condyles (15 ). These chambers (14) can be compressed (13a) and decompressed (13b), accumulate and spurt out (16) synovial fluid, from and to the articulating surfaces. The movement of the synovial fluid and gases from and to (16-19) the exit (26) openings creates viscoelasticity, and improves the lubrication of the moving parts. Simultaneously, permeable filter (21) materials interpolate to the synovial fluid flow (16-19) trapping the debris.</p> |
