School of Mechatronic Engineering, China University of Mining and Technology, Xuzhou, Jiangsu, 221116, People's Republic of China.
School of Materials and Physics, China University of Mining and Technology, Xuzhou, Jiangsu, 221116, People's Republic of China.
J Mater Sci Mater Med. 2021 Oct 22;32(11):132. doi: 10.1007/s10856-021-06566-y.
Artificial hemiarthroplasty is one of the effective methods for the treatment of hip joint diseases, but the wear failure of the interface between the hemi hip joint material and articular cartilage restricts the life of the prosthesis. Therefore, it is important to explore the damage mechanism between the interfaces to prolong the life of the prosthesis and improve the life quality of the prosthesis replacement. In this paper, the creep and bio-tribological properties of cartilage against PEEK, CoCrMo alloy, and ceramic were studied, and the tribological differences between "hard-soft" and "soft-soft" contact were analyzed based on biomorphology. The results showed that with the increase of time in vitro, the thickness of the cartilage membrane decreased, the surface damage was aggravated, and the anti-creep ability of cartilage was weakened. Second, the creep resistance of the soft-soft contact pair was better than that of the hard-soft contact pair. Also, the greater the load and the longer the wear time, the more serious the cartilage damage. Among the three friction pairs, the cartilage in PEEK/articular cartilage was the least damaged, followed by CoCrMo alloy/articular cartilage, and the most damage was found in ceramic/articular, indicating that the soft-soft friction pair inflicted the least damage to the cartilage.
人工半髋关节置换术是治疗髋关节疾病的有效方法之一，但髋关节材料与关节软骨界面的磨损失效限制了假体的寿命。因此，探索界面之间的损伤机制对于延长假体寿命和提高假体置换的生活质量非常重要。本文研究了软骨对 PEEK、CoCrMo 合金和陶瓷的蠕变和生物摩擦学性能，并基于生物形态学分析了“硬-软”和“软-软”接触之间的摩擦学差异。结果表明，随着体外时间的增加，软骨膜厚度减小，表面损伤加剧，软骨的抗蠕变能力减弱。其次，软-软接触副的抗蠕变能力优于硬-软接触副。此外，载荷越大，磨损时间越长，软骨损伤越严重。在三种摩擦副中，PEEK/关节软骨中的软骨损伤最小，其次是 CoCrMo 合金/关节软骨，陶瓷/关节软骨的损伤最大，表明软-软摩擦副对软骨的损伤最小。
