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Surface and form metrology of polished “freeform” biological surfaces

Charlton, P. and Blunt, Liam (2007) Surface and form metrology of polished “freeform” biological surfaces. Wear, 264 (5-6). pp. 394-399. ISSN 0043-1648

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It is a well documented fact that in the developed world the general population is aging and the percentage of elderly persons within the total population is growing rapidly. This demographic change has massively increased healthcare demands. In aging persons osteo-arthritis has been shown to be particularly problematic. Osteo-arthritis is the progressive degeneration of the natural cartilage tissue which plays a critical part in the load bearing function of hip and knee joints. Solutions to the problems caused by this tissue breakdown are administration of anti-inflammatory drugs or more normally and especially in advanced cases is the replacement of all or part of the joint with artificial joints. Worldwide, the total number of implant procedures is around 800,000. Today the life expectancy of such systems is 5–15 years. This paper outlines the development of a new technique which has been adapted to polish free form knee joint surfaces. The manufacturing route utilises a seven axes CNC Zeeko polishing machine to polish knee joint surfaces to the required form and finish. The paper discusses the process constraints and optimal settings and the surface generation process.

Item Type: Article
Additional Information: Published in Wear, Vol 264, 5-6, pp394-399, 2007. Copyright © 2008 Elsevier B.V.
Subjects: T Technology > T Technology (General)
T Technology > TA Engineering (General). Civil engineering (General)
Schools: School of Computing and Engineering
School of Computing and Engineering > Centre for Precision Technologies
School of Computing and Engineering > Centre for Precision Technologies > Surface Metrology Group
Related URLs:
References: [1] J. Fisher, Comparative wear and debris generation in UHMWPE on ceramic, metal on metal and ceramic on ceramic hip prosthesis, Proceedings of the 46th Annual Meeting, Othopaedic Research Society, Orlando, USA, March 2000. [2] D. Walker and D. Brookes, The first aspheric form and texture results from a production machine embodying the precession process, SPIE 46th Annual Meeting, the International Symposium on Optical Science and Technology San Diego, July (2001). [3] P. Charlton, From Optical Surfaces to Prosthetic Joint Lifetime, EPSRC Grant Ref GR/S10216/01, Progress Report. [4] National Physics Laboratory, Engineering Measurement Program, [5] L. Blunt, X.Q. Jiang and K.J. Stout, 3D measurement of the surface topography of ceramic and metallic orthopaedic joint prostheses, J. Mater. Sci.: Mater. Med. 11 (2000), pp. 235–246. Full Text via CrossRef | View Record in Scopus | Cited By in Scopus (9)
Depositing User: Briony Heyhoe
Date Deposited: 20 Jun 2008 13:48
Last Modified: 28 Aug 2021 10:38


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