Hip joint replacements represent the most effective way of treatment for patients suffering from joint diseases. Despite the rapid improvement of implant materials over the last few decades, limited longevity associated with wear-related complications persists as the main drawback. Therefore, improved tribological performance is required in order to extend the service life of replacements. The effect of surface texturing of ultra-high molecular weight polyethylene (UHMWPE) acetabular cup was investigated in the present study. Unique tilling method was utilized for manufacturing the dimples with controlled diameter and depths on the contact surface of the cup. The experiments with four commercial femoral components and two model lubricants were realized. The main attention was paid to a coefficient of friction considering the differences between the original and the dimpled cups. Results showed remarkable lowering of friction, in general. Focusing on the simulated human synovial fluid, friction was reduced by 40% (alumina ceramic), 38.8% (zirconia toughened ceramic), 25.5% (metal), and 9.9% (oxinium). In addition, the dimples helped to keep the friction stable without fluctuations. To conclude, the paper brings a new insight into frictional behaviour of the hip replacements during running-in phase which is essential for overall implant lifespan. It is believed that proper surface texturing may rapidly improve the life quality of millions of patients and may lead to considerable financial savings.

中文翻译：

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髋关节置换术的磨合摩擦可以大大降低：表面纹理的髋臼杯的效果

髋关节置换术是关节疾病患者最有效的治疗方法。尽管在过去的几十年中植入物材料得到了快速改进，但与磨损相关的并发症相关的寿命有限仍然是主要缺点。因此，需要改进的摩擦学性能以延长替换件的使用寿命。在本研究中研究了超高分子量聚乙烯（UHMWPE）髋臼杯的表面纹理化效果。利用独特的耕作方法在杯子的接触表面上制造直径和深度可控的凹坑。实现了使用四种市售股骨组件和两种模型润滑剂的实验。考虑到原始杯和凹杯之间的差异，主要关注摩擦系数。结果表明，总体上，摩擦力明显降低。专注于模拟的人体滑液，摩擦力降低了40％（氧化铝陶瓷），38.8％（氧化锆增韧陶瓷），25.5％（金属）和9.9％（氧）。此外，凹坑有助于保持摩擦稳定而无波动。总之，本文为磨合阶段的髋关节置换物的摩擦行为提供了新的见解，这对于整个植入物的使用寿命至关重要。据信，适当的表面纹理化可以迅速改善数百万患者的生活质量，并可以节省大量资金。专注于模拟的人体滑液，摩擦力降低了40％（氧化铝陶瓷），38.8％（氧化锆增韧陶瓷），25.5％（金属）和9.9％（氧）。此外，凹坑有助于保持摩擦稳定而无波动。总之，本文为磨合阶段的髋关节置换物的摩擦行为提供了新的见解，这对于整个植入物的使用寿命至关重要。据信，适当的表面纹理化可以迅速改善数百万患者的生活质量，并可以节省大量资金。专注于模拟的人体滑液，摩擦力降低了40％（氧化铝陶瓷），38.8％（氧化锆增韧陶瓷），25.5％（金属）和9.9％（氧）。此外，凹坑有助于保持摩擦稳定而无波动。总之，本文为磨合阶段的髋关节置换物的摩擦行为提供了新的见解，这对于整个植入物的使用寿命至关重要。据信，适当的表面纹理化可以迅速改善数百万患者的生活质量，并可以节省大量资金。该论文为磨合阶段的髋关节置换物的摩擦行为提供了新的见解，这对于整个植入物的使用寿命至关重要。据信，适当的表面纹理化可以迅速改善数百万患者的生活质量，并可以节省大量资金。该论文为磨合阶段的髋关节置换物的摩擦行为提供了新的见解，这对于整个植入物的使用寿命至关重要。据信，适当的表面纹理化可以迅速改善数百万患者的生活质量，并可以节省大量资金。