Wear behaviours and oxidation effects on different uhmwpe acetabular cups using a hip joint simulator
| Autor: | Sami Abdel Jaber, Saverio Affatato, Alessandro Ruggiero, Pierangiola Bracco, Massimiliano Merola |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Oxidative degradation 02 engineering and technology Surface finish lcsh:Technology Article 03 medical and health sciences chemistry.chemical_compound 0302 clinical medicine Differential scanning calorimetry Cross-linked PE FTIR analysis Hip simulator Standard PE Vitamin-E stabilized PE Materials Science (all) General Materials Science Composite material Lubricant lcsh:Microscopy lcsh:QC120-168.85 030222 orthopedics lcsh:QH201-278.5 lcsh:T Hip joint simulator Polyethylene 021001 nanoscience & nanotechnology chemistry lcsh:TA1-2040 lcsh:Descriptive and experimental mechanics lcsh:Electrical engineering. Electronics. Nuclear engineering Profilometer lcsh:Engineering (General). Civil engineering (General) 0210 nano-technology lcsh:TK1-9971 |
| Zdroj: | Materials; Volume 11; Issue 3; Pages: 433 Materials, Vol 11, Iss 3, p 433 (2018) Materials |
| Popis: | Given the long-term problem of polyethylene wear, medical interest in the new improved cross-linked polyethylene (XLPE), with or without the adding of vitamin E, has risen. The main aim of this study is to gain further insights into the mutual effects of radiation cross-linking and addition of vitamin E on the wear performance of ultra-high-molecular-weight polyethylene (UHMWPE). We tested four different batches of polyethylene (namely, a standard one, a vitamin E-stabilized, and two cross-linked) in a hip joint simulator for five million cycles where bovine calf serum was used as lubricant. The acetabular cups were then analyzed using a confocal profilometer to characterize the surface topography. Moreover; the cups were analyzed by using Fourier Transformed Infrared Spectroscopy and Differential Scanning Calorimetry in order to assess the chemical characteristics of the pristine materials. Comparing the different cups’ configuration, mass loss was found to be higher for standard polyethylene than for the other combinations. Mass loss negatively correlated to the cross-link density of the polyethylenes. None of the tested formulations showed evidence of oxidative degradation. We found no correlation between roughness parameters and wear. Furthermore, we found significantly differences in the wear behavior of all the acetabular cups. XLPEs exhibited lower weight loss, which has potential for reduced wear and decreased osteolysis. However, surface topography revealed smoother surfaces of the standard and vitamin E stabilized polyethylene than on the cross-linked samples. This observation suggests incipient crack generations on the rough and scratched surfaces of the cross-linked polyethylene liners. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|