PEEK and CFR-PEEK as alternative bearing materials to UHMWPE in a fixed bearing total knee replacement: An experimental wear study.
PEEK and CFR-PEEK as alternative bearing materials to UHMWPE in a fixed bearing total knee replacement: An experimental wear study.
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DOI：
10.1016/j.wear.2016.12.010
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发表时间：
2017-03-15
期刊：
影响因子：
--
通讯作者：
Jennings LM
中科院分区：
文献类型：
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作者：
Brockett CL;Carbone S;Fisher J;Jennings LM
全关节置换术的新轴承材料已经被探索，因为需要延长寿命和提高性能是由患者人口变化的需求驱动的。碳增强PEEK在简单几何钉板研究和全髋关节置换术的实验磨损模拟中都表现出良好的磨损特性。碳增强PEEK CFR-PEEK具有减少胫骨插入物厚度和保护膝关节骨的潜力。本研究调查了低符合性全膝关节置换术中PEEK和CFR-PEEK的磨损性能。定制的平板刀片在膝关节磨损模拟中与钴铬股骨轴承进行了300万次的测试。在整个研究过程中，每隔一段时间对磨损进行重量评估。在同等条件下，PEEK和CFR-PEEK的磨损率都非常高，几乎比超高分子量聚乙烯的磨损率高出两个数量级。材料的机械失效的证据，包括表面开裂和分层在两种材料中观察到。本研究强调，这些材料可能不适合在低符合性设计中替代超高分子量聚乙烯。研究了PEEK和CFR-PEEK作为TKR中PE替代品的磨损情况。PEEK和CFR-PEEK的磨损率都很高。在相同条件下，其磨损率比UHWMPE高两个数量级。PEEK和CFR-PEEK材料机械失效的证据。
New bearing materials for total joint replacement have been explored as the need to improve longevity and enhance performance is driven by the changing demands of the patient demographic. Carbon-reinforced PEEK has demonstrated good wear characteristics in experimental wear simulation in both simple geometry pin-on-plate studies and in total hip joint replacement. Carbon reinforced PEEK CFR-PEEK has the potential to reduce tibial insert thickness and preserve bone in the knee. This study investigated the wear performance of PEEK and CFR-PEEK in a low conformity total knee replacement configuration. Custom-made flat inserts were tested against cobalt-chromium femoral bearings in a knee wear simulation for a period of three million cycles. Wear was assessed gravimetrically at intervals throughout the study. The wear rates of both PEEK and CFR-PEEK were very high and almost two orders of magnitude higher than the wear rate of UHMWPE under comparable conditions. Evidence of mechanical failure of the materials, including surface cracking and delamination was observed in both materials. This study highlights that these materials may not be suitable alternatives for UHMWPE in low-conformity designs. Study investigated wear of PEEK and CFR-PEEK as alternative to PE in TKR. Very high wear rates observed for both PEEK and CFR-PEEK. Wear rates two orders of magnitude higher than UHWMPE under same conditions. Evidence of mechanical failure of PEEK and CFR-PEEK materials.