Scanning Electron Microscopy and Energy-Dispersive X-Ray Spectroscopy as a Valuable Tool to Investigate the Ultra-High-Molecular-Weight Polyethylene Wear Mechanisms and Debris in Hip Implants
| Autor: | Patricia O. Cubillos, Carlos Rodrigo de Mello Roesler, Henrique Schappo, Marcia M. Maru, Gean Vitor Salmoria, Izabelle de Mello Gindri |
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| Rok vydání: | 2018 |
| Předmět: |
musculoskeletal diseases
Surface Properties Scanning electron microscope Energy-dispersive X-ray spectroscopy 02 engineering and technology law.invention chemistry.chemical_compound 0203 mechanical engineering law Materials Testing Humans Medicine Orthopedics and Sports Medicine Particle Size Composite material Ultra-high-molecular-weight polyethylene Range (particle radiation) business.industry Spectrum Analysis Spectrometry X-Ray Emission Acetabulum Polyethylene 021001 nanoscience & nanotechnology Debris Prosthesis Failure 020303 mechanical engineering & transports chemistry Metals Microscopy Electron Scanning Hip Prosthesis Particle size Polyethylenes Electron microscope 0210 nano-technology business |
| Zdroj: | The Journal of Arthroplasty. 33:258-262 |
| ISSN: | 0883-5403 |
| DOI: | 10.1016/j.arth.2017.07.039 |
| Popis: | BACKGROUND The use of scanning electron microscopy (SEM) and energy-dispersive spectrometry (EDS) was investigated to understand the wear mechanisms from a metal-on-polyethylene bearing couple. Morphological features of femoral head acetabular liner, and isolated particles resulting from hip wear testing were evaluated. EDS was proposed to investigate the polymeric nature of the particles isolated from the wear testing. METHODS In this work, 28-mm conventional ultra-high-molecular-weight polyethylene acetabular liners paired with metallic heads were tested in a hip wear simulator over 2 million cycles. SEM-EDS was employed to investigate wear mechanisms on hip implant components and associated wear debris. RESULTS SEM showed worn surfaces for both hip components, and a significant volume of ultra-high-molecular-weight polyethylene wear particles resulting from hip wear testing. Particles were classified into 3 groups, which were then correlated to wear mechanisms. Group I had particles with smooth surfaces, group II consisted of particles with rough surfaces, and group III comprised aggregate-like particles. Group I EDS revealed that particles from groups I and II had a high C/O ratio raising a concern about the particle source. On the other hand, particles from group III had a low C/O ratio, supporting the hypothesis that they resulted from the wear of acetabular liner. Most of particles identified in group III were in the biologically active size range (0.3 to 20 μm). CONCLUSION The use of optical and electron microscopy enabled the morphological characterization of worn surfaces and wear debris, while EDS was essential to elucidate the chemical composition of isolated debris. |
| Databáze: | OpenAIRE |
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