Weimin Fan, Huanghe Song, Xiang Li, Feng Liu, Qing Wang
Department of Orthopedics, The First Affiliated Hospital of Nanjing Medical University Nanjing, China.
J Arthroplasty. 2009 Jun;24(4):543-8. doi: 10.1016/j.arth.2008.01.308. Epub 2008 Apr 11.
The aim of the study is to explore the impact of storage time on wear rates. Two groups of acetabular liners with a storage time of 1 and 4 years were tested on 2 hip simulators of the same type. There were 6 liners in each group. Gravimetric analysis was performed every 500 000 cycles for a total of 3 million cycles. The mean wear rate for the group of 4-year-old liners (36.3 mg/million cycles) was significantly higher than that for the 1-year-old group (23.1 mg/million cycles) (P < .05). After the last gravimetric analysis, scanning electron microscopy was used to observe the wear patterns of the bearing surfaces. This study found that wear resistance decreased as storage time increased.
本研究的目的是探讨储存时间对磨损率的影响。两组储存时间分别为1年和4年的髋臼内衬在两台相同型号的髋关节模拟器上进行测试。每组有6个内衬。每500000次循环进行一次重量分析，总共进行3000000次循环。4年陈放内衬组的平均磨损率（36.3毫克/百万次循环）显著高于1年陈放组（23.1毫克/百万次循环）（P < 0.05）。在最后一次重量分析后，使用扫描电子显微镜观察轴承表面的磨损模式。本研究发现，耐磨性随储存时间的增加而降低。
