Surface texturing is an effective technology in improving the tribological performance of artificial joints. However, the mechanism behind it is still a controversial topic, especially when talking about the functionality of hydrodynamic pressure. In this paper, Finite Difference Method was used to solve the steady-state Reynolds equation. It was found that, under the given conditions, hydrodynamic pressure only played a minor role in the tribological performance of textured bioimplants. A further theoretical study indicated that this phenomenon was attributed to the working environments of artificial joints: low viscosity lubricant and low sliding speed. A comparison study between tribo-systems with various working conditions also showed that hydrodynamic pressure played a more important role in the systems either under fast speed or lubricated by high-viscosity solution. Finally, a pin-on-disk frictional study was carried out with different sliding velocities and it was confirmed that hydrodynamic pressure has little effect on the tribological performance of textured bioimplants.

表面织构是提高人工关节摩擦学性能的有效技术。然而，其背后的机制仍然是一个有争议的话题，尤其是在谈论流体动压的功能时。本文采用有限差分法求解稳态雷诺方程。结果表明，在给定条件下，流体动力压力仅在纹理生物植入物的摩擦学性能中起次要作用。进一步的理论研究表明，这种现象归因于人工关节的工作环境：低粘度润滑剂和低滑动速度。不同工作条件下摩擦系统之间的比较研究也表明，无论是在高速下还是在高粘度溶液润滑下，流体动压力在系统中都起着更重要的作用。最后，在不同滑动速度下进行了销-盘摩擦研究，并证实流体动压对纹理生物植入物的摩擦学性能几乎没有影响。