Download Bio-tribocorrosion in biomaterials and medical implants by Yu Yan PDF

By Yu Yan

In the course of their provider lifestyles, so much biomaterials and scientific implants are prone to tribological harm. furthermore, the environments within which they're put are frequently corrosive. the mix of triobology, corrosion and the organic surroundings has been named ‘bio-tribocorrosion’. realizing this advanced phenomenon is important to bettering the layout and repair lifetime of scientific implants. this significant ebook studies key fresh examine during this sector. After an creation to the topography of bio-tribocorrosion, half one discusses sorts of tribocorrosion in addition to the prediction of wear and tear in clinical units. half appears to be like at organic results on tribocorrosion methods. half 3 studies the problem of bio-tribocrrosion in medical perform, together with dental and orthopaedic purposes.

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Extra info for Bio-tribocorrosion in biomaterials and medical implants

Sample text

The repetitive loading on the implant material by human behavior may propagate surface cracking, and the synergetic combination between corrosion and surface layer fractures accelerates the interacting surface damage. This repetitive oxidation leads to an increase in local hydrogen concentration (pH levels drop) by consuming oxygen in physiological body fluid and thus increasing the electrochemical reactivity. This event produces corrosion products near the implant site and leads to biocompatibility problems.

1973), The Delamination Theory of Wear, Wear. 25: 111–124. W. B. (1999), Surface Characterization of Metal-on-Metal Hip Implants Tested in a Hip Simulator, Wear. 225: 708–715. N. and Smith, R. (1985), Protein Adsorption and Desorption Phenomena on Clean Metal Surfaces, Journal of Biomedical Materials Research. 19: 313–320. A. and Merritt, K. (1988), Electrochemical Studies on the Influence of Proteins on the Corrosion of Implant Alloys, Biomaterials. 9: 181–186. , Heitkemper, M. and Fischer, A.

The local acidic concentration leads to the more aggressive electrochemical dissolution of metal ions. 4 Surface and subsurface crack initiation by frictional contact and corrosion pit. environment in the implant crevice. This unstable oxidation will significantly modify the physical and mechanical properties of the metal surface and corrupt the wear resistance. Thus, modular tapers are susceptible to fretting contact and crevice corrosion. The mechanism is summarized in Fig. 4. , 2009; Chandra, 2011).

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