Scholes S C, Unsworth A, Jones E
Centre for Biomedical Engineering, Durham University, DH1 3LE, UK.
Phys Med Biol. 2007 Jan 7;52(1):197-212. doi: 10.1088/0031-9155/52/1/013. Epub 2006 Dec 14.
Many materials are used as artificial joint bearing surfaces; these include conventional stainless steel or CoCrMo-on-ultra-high molecular weight polyethylene (UHMWPE), CoCrMo on itself and alumina-on-alumina. However, these joints have a limited lifespan resulting in failure of the prosthesis and the need for revision surgery. A number of materials have been introduced recently in an attempt to overcome these problems. Polycarbonate urethane (PU) is a compliant material that can be used as an artificial joint bearing surface which has been developed to mimic the natural synovial joint more accurately by promoting fluid film lubrication. Tribological tests were performed on CoCrMo-on-PU unicondylar knee prostheses to assess their performance in vitro. The wear produced by these components was considerably lower than that found for conventional joints. They also exhibited low friction and operated close to full-fluid film lubrication with viscosities of lubricant similar to those found in patients with arthritis. These tests gave encouraging results for the tribological performance of this material couple for use as an alternative bearing combination.
许多材料被用作人工关节的承重表面；这些材料包括传统的不锈钢或钴铬钼对超高分子量聚乙烯（UHMWPE）、钴铬钼自身对自身以及氧化铝对氧化铝。然而，这些关节的使用寿命有限，会导致假体失效并需要进行翻修手术。最近引入了一些材料来试图克服这些问题。聚碳酸酯聚氨酯（PU）是一种柔顺材料，可作为人工关节承重表面，它通过促进液膜润滑来更精确地模拟天然滑膜关节。对钴铬钼对PU单髁膝关节假体进行了摩擦学测试，以评估其体外性能。这些部件产生的磨损远低于传统关节。它们还表现出低摩擦，并且在润滑剂粘度与关节炎患者体内相似的情况下，接近全液膜润滑运行。这些测试为这种材料组合作为替代承重组合的摩擦学性能给出了令人鼓舞的结果。
