Abstract
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.
Highlights
At present, osteoarthritis caused by articular cartilage wear has become the most common disabling disease in the world, with about 400 million people suffering from it
Artificial joint replacement is an effective method to reconstruct joint function and treat arthritis, which can be divided into hemiarthroplasty and total hip arthroplasty
0.35 increase the service life of artificial joints, it is necessary to study the tribological properties of natural articular cartilage and hemi hip joint materials [2]
Summary
Osteoarthritis caused by articular cartilage wear has become the most common disabling disease in the world, with about 400 million people suffering from it. 0.35 increase the service life of artificial joints, it is necessary to study the tribological properties of natural articular cartilage and hemi hip joint materials [2]. The common artificial hemi hip replacement materials are CoCrMo alloys and zirconia ceramics, forming “hard–soft” contact pairs with cartilage, resulting in severe cartilage wear, osteolysis, aseptic loosening, and prosthesis failure [4,5,6], leading to a gap with natural joints. Qian and Shirong [7] used natural articular cartilage/ceramics to carry out a tribological test on reciprocating motion tests to explore the wear of hemi hip replacements. The tribological differences between the hard–soft and soft–soft contact pairs were compared, which provided a theoretical basis for the selection of hemi hip joint materials
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