Custom-made of the artificial hip joint which reduced dislocatio risk.

随着髋关节病患者数量的增加，髋关节置换术的数量也在增加。金属-金属接触的表面置换型人工髋关节被认为是骨保护的有效选择。然而，它表明，金属-金属接触型人工髋关节可能是有毒的人体细胞时，钴铬合金的磨损粉末，关节的一个组成部分，电离。在本研究中，我们研究了陶瓷涂层的钴铬合金的金属件。使用销盘磨损试验方法，我们研究了它们的耐磨性和金属离子洗脱到拟体液中。结果表明，DLC涂层的金属件在摩擦系数、耐磨性和离子洗脱性能方面表现出最好的性能。

Hip replacement arthroplasties have been increasing in number as the number of patients with coxarthrosis is increasing. Prosthetic hip joints of the surface replacement type with metal-metal contact are considered to be an effective choice for bone preservation. It is however shown that the metal-metal contact type prosthetic hip joint could be toxic to human cells when the abrasion powder of the Co-Cr alloy, a component of the joint, is ionized. In the present study we examined ceramic-coated metal pieces of the Co-Cr alloy. Using the Pin-On-Disk abrasion test method, we investigated their abrasion resistance and the elution of the metal ions into a pseudo body fluid. As a result, the metal pieces with DLC coating showed the best performances in terms of the frictional coefficient, the abrasion resistance and the elution property of the ions.