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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Blunt, Liam
University of Huddersfield
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (23/23 displayed)
- 2024Trueness of vat-photopolymerization printing technology of interim fixed partial denture with different building orientationcitations
- 2022Reaction Sintering of Biocompatible Al2O3-hBN Ceramicscitations
- 2020Challenges in Inspecting Internal Features for SLM Additive Manufactured Build Artifactscitations
- 2020The Detection of Unfused Powder in EBM and SLM Additive Manufactured Componentscitations
- 2020Development of an Additive Manufactured Artifact to Characterize Unfused Powder Using Computed Tomographycitations
- 2020Quantification of additive manufacturing induced variations in the global and local performance characteristics of a complex multi-stage control valve trimcitations
- 2019Introduction of a Surface Characterization Parameter Sdrprime for Analysis of Re-entrant Featurescitations
- 2019Hot-melt extrusion process impact on polymer choice of glyburide solid dispersionscitations
- 2019The challenges in edge detection and porosity analysis for dissimilar materials additive manufactured components
- 2018Optimization of surface determination strategies to enhance detection of unfused powder in metal additive manufactured components
- 2018Development of an AM artefact to characterize unfused powder using computer tomography
- 2018Characterisation of powder-filled defects in additive manufactured surfaces using X-ray CT
- 2018An interlaboratory comparison of X-ray computed tomography measurement for texture and dimensional characterisation of additively manufactured partscitations
- 2017Areal surface texture data extraction from X-ray computed tomography reconstructions of metal additively manufactured partscitations
- 2017Results from an interlaboratory comparison of areal surface texture parameter extraction from X-ray computed tomography of additively manufactured parts
- 2017Method for characterizing defects/porosity in additive manufactured components using computer tomography
- 2016Method for Characterization of Material Loss from Modular Head-Stem Taper Surfaces of Hip Replacement Devicescitations
- 2015Implementation of wavelength scanning interferometry for R2R flexible PV barrier films
- 2014Defect Detection in Thin-film Photovoltaics; Towards Improved Efficiency and Longevitycitations
- 2014Development of the basis for in process metrology for roll to roll production of flexible photo voltaics
- 2014An interferometric auto-focusing method for on-line defect assessment on a roll-to-roll process using wavelength scanning interferometry
- 2009Comparison of Type F2 Software Measurement Standards for Surface Texture
- 2006The use of CMM techniques to assess the wear of total knee replacements
Places of action
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booksection
The use of CMM techniques to assess the wear of total knee replacements
Abstract
Total joint replacement is one of the most common elective surgical procedures performed worldwide, with an estimate of 1.5 million operations performed annually. Currently joint replacements are expected to function for 10-15 years, however, with an increase in life expectancy, and a greater call for knee replacement due to increased activity levels, there is a requirement to improve their function to offer longer term improved quality of life for patients. Wear analysis of total joint replacements has long been an important means in determining failure mechanisms and improving longevity of these devices. In developing such joints the industry standard and ISO wear measurement methodology is to use gravimetric methods only. The method is not as easy to apply accurately as it would first appear and can introduce significant errors to the wear measurement when there is material transfer from the metal component to the plastic component or when trying to consider the effects of fluid uptake into the ultra high molecular weight polyethylene (UHMWPE) counterface. It is also impossible to accurately measure a cemented component throughout a test by using purely gravimetric means due to similar fluid uptake and loss of cement material. As a result it is important to have an alternative measurement method that accounts for this factor. The only reasonable answer is to physically measure the component, and using co-ordinate metrology is the first, most reasonable step in this direction. The effectiveness of the CMM technique for assessing volumetric material loss during simulated life testing of a replacement knee joint has been proved previously by the authors. The purpose of this study is to establish an extension to this through the use of improved geometrical using a Zeiss Prismo CMM methods to measure component wear when there was no pre-wear data taken. To prove out the method a simulator test was run to 5 million cycles and gravimetric measurements taken throughout the test, such that the components measured had a known wear value. The wear volumes are estimated and compared against gravimetric techniques. The implications of the results are further discussed in terms of assessment of joint functionality and development of standardised CMM based product standards. In addition the results are discussed in terms of their applicability to the measurement of wear on hard on hard knee systems.