Personalized hip implants manufacturing and testing
| Autor: | B. Adrian Pacioga, C. Stanca Comsa, A. Sorin Mihai Croitoru |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Embedment 0206 medical engineering General Physics and Astronomy Titanium alloy Medical practice 02 engineering and technology Surfaces and Interfaces General Chemistry Femoral stem 021001 nanoscience & nanotechnology Condensed Matter Physics 020601 biomedical engineering Fatigue limit Surfaces Coatings and Films Bone ingrowth Forensic engineering Implant Elasticity (economics) 0210 nano-technology Biomedical engineering |
| Zdroj: | Applied Surface Science. 417:256-261 |
| ISSN: | 0169-4332 |
| DOI: | 10.1016/j.apsusc.2017.02.185 |
| Popis: | Two models of Ti6Al4V personalized femoral stems for hip replacement have been designed and laser sintered with different sizes of fenestrated architecture that mimics the natural structure of bone, ensuring postoperative bone ingrowth and increasing the elasticity of the entire structure. They were tested statically and dynamically versus a commercial femoral stem. Mechanical tests were performed in order to determine the fatigue limit using the Locati method. The tests were conducted in a thermostatic bath (37°±1°) with the implants immersed in distilled water salted solution 0.91%. For probe embedment poly-methyl methacrylate (PMMA) was used. The characteristic curves of the two personalized fenestrated implants reveal an elastic behaviour by their nonlinear appearance. After dynamic tests an inverse relationship between displacements obtained in the static tests and the fatigue limit was observed. Large fenestrations conferred the desired elasticity to the implant, but contributed to a life service reduction. The fatigue limit for both implants was much above the minimum value specified by ISO 7602: 2010, so both models can be safely used in the medical practice, leading to increased life service of implants. |
| Databáze: | OpenAIRE |
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