Maharaj G, Bleser S, Albert K, Lambert R, Jani S, Jamison R
Smith & Nephew Rolyan, Inc., Germantown, WI.
Biomed Mater Eng. 1994;4(3):193-8.
Carbon fiber reinforced polyetheretherketone (C/PEEK) composite materials are being investigated as an alternative to metal in the femoral component of a total hip arthroplasty. Wear is among the issues that must be addressed before introducing a new orthopaedic implant material. This study examines the generation of wear debris when zirconia femoral heads are mechanically attached to C/PEEK trunnions and loaded under simulated physiological conditions. Mechanical testing was performed on a trunnion/head assembly loaded from 445 to 4450N at an angle of 39 degrees to the long axis of the trunnion. The trunnions were tested at a frequency of 20 Hz for 10 million cycles. After completion of the fatigue test, solution from the test assembly was characterized by laser scattering and by SEM image analysis to determine the size, shape, total number, and identify of the particles. In addition, the peak load to pull the head from the trunnion was measured. The total number of particles generated during the test was in the range of 10(5) as indicated by both laser scattering and (SEM) image analysis. Both carbon fiber and PEEK particles were found in an average proportion of about 1:13, respectively. The carbon fiber particle size average was 153 microns and the PEEK particle size average was 2.2 microns. The zirconia heads remained well attached to the C/PEEK trunnions as indicated by a mean peak distraction force of 1942 +/- 116N.
碳纤维增强聚醚醚酮（C/PEEK）复合材料正被研究用作全髋关节置换术股骨部件中金属的替代品。在引入一种新的骨科植入材料之前，磨损是必须解决的问题之一。本研究考察了氧化锆股骨头机械连接到C/PEEK耳轴并在模拟生理条件下加载时磨损碎屑的产生情况。对耳轴/股骨头组件进行机械测试，加载力从445牛至4450牛，与耳轴长轴呈39度角。耳轴以20赫兹的频率测试1000万次循环。疲劳试验完成后，通过激光散射和扫描电子显微镜图像分析对测试组件中的溶液进行表征，以确定颗粒的大小、形状、总数和种类。此外，测量了将股骨头从耳轴上拔出的峰值载荷。激光散射和扫描电子显微镜图像分析均表明，测试过程中产生的颗粒总数在10⁵范围内。发现碳纤维颗粒和聚醚醚酮颗粒的平均比例分别约为1:13。碳纤维颗粒平均尺寸为153微米，聚醚醚酮颗粒平均尺寸为2.2微米。氧化锆股骨头与C/PEEK耳轴保持良好连接，平均峰值拔出力为1942±116牛。
