The effect of diamond like carbon coating on fretting corrosion and wear at the modular head-stem junction of metal on metal total hip replacements
At a Glance
Section titled âAt a Glanceâ| Metadata | Details |
|---|---|
| Publication Date | 2016-01-01 |
| Journal | Frontiers in Bioengineering and Biotechnology |
| Authors | P.L. De Anna, Meswania Jayantilal, Khabab Osman, Hart Alister, Skinner John |
Abstract
Section titled âAbstractâEvent Abstract Back to Event The effect of diamond like carbon coating on fretting corrosion and wear at the modular head-stem junction of metal on metal total hip replacements Anna Panagiotidou1, 2*, Jayantilal M. Meswania1*, Osman Khabab1*, Alister Hart1, 3, John Skinner1, 3*, Fares Haddad2* and Gordon Blunn1* 1 UCL, Institute of Orthopaedics, United Kingdom 2 University College Hospital, United Kingdom 3 Royal National Orthopaedic Hospital, United Kingdom Introduction: Large head metal-on-metal retrieval studies have indicated that a significant amount of metal wear is directly attributable to the modular head-neck interface. Recent reports about the wear at this interface from metal on plastic THRs have been published. Release of metal ions and debris from this junction is attributed to mechanically assisted crevice corrosion (MACC). Galvanic coupling between cobalt chrome and titanium alloys may also contribute to metal ion release at this junction. Diamond-like carbon (DLC) is a very promising thin coating in this context because it is extremely hard, chemically inert, non-conducting and wear resistant. The aim of this study is to investigate if a coating of DLC on the surface of the male taper can reduce MACC of the cobalt chrome female taper. Methods: Neck tapers were manufactured to a single specification (average Rz=16.01”m, Ra=3.98”m). Three Ti-6Al-4V alloy tapers were coated with DLC by plasma enhanced chemical vapour deposition. These tapers were assembled using a standard impaction force of 4kN in accordance with ASTM F1875-98. 3 non-coated tapers were similarly impacted. The surface profile of both female and male tapers were measured using a Talyrond 365 roundness machine with 180 traces 2O apart in order to provide a baseline volumetric measurement of the taper surface. The tapers were enclosed in individual chambers orientated at head/neck angle of 1350. Components were immersed in 10% bovine calf serum diluted with Phosphate Buffered Saline (PBS) solution with pH 7.4 200C±10C. The femoral heads of the 6 assemblyâs were cyclically loaded between 300N to 2.3kN using a sinusoidal wave-form at 1 Hz. Measurement of fretting current during for both coated and uncoated combinations was carried out during long-term cyclic loading for10 million cycles. After 10 million cycles the tapers were disassembled by sectioning through the centre of the head using a diamond saw thus preventing damage during disassembly. Light microscopy and scanning electron microscopy (SEM) of the component surfaces allowed assessment of surface deformation, crevice and pitting corrosion post in-vitro simulation. Statistical comparison of the mean fretting currents was made using a Mann Whitney U test. Results: The fretting currents for the all components reduced upon cyclic loading. The mean fretting current for the DLC components remain low between 2 and 10 million cycles, whereas the current for the non-coated components increased after 3 million cycles and remained significantly (p=<0.05) higher throughout the reminder of the test (figure 1). At 10 million cycles the fretting current was over 2 times lower for DLC coated components. Examination of the titanium male tapers after the 10 million-cycle wear test showed that DCL remained intact. The female tapers adjacent to the DLC visually showed less damage that those adjacent to non-coated titanium tapers (figure 2). Analysis of the surface profiles of the female tapers showed that there were greater amounts of imprinting seen adjacent to the non-coated titanium spigots. There was also a much larger build up of corrosion deposits on these female tapers. Conclusion: In this study we have shown that DLC coating of Ti-6Al-4V alloy neck tapers show a reduction in the fretting current compared to non-coated tapers indicating a greater resistance to MACC. This was confirmed by the specimens after a 10 million cyclic test which showed greater MACC on the female taper adjacent to the non coated titanium alloy spigots. Keywords: corrosion, Implant, wear Conference: 10th World Biomaterials Congress, MontrĂ©al, Canada, 17 May - 22 May, 2016. Presentation Type: General Session Oral Topic: Biomaterials in musculoskeletal orthopeadics and tissues Citation: Panagiotidou A, Meswania JM, Khabab O, Hart A, Skinner J, Haddad F and Blunn G (2016). The effect of diamond like carbon coating on fretting corrosion and wear at the modular head-stem junction of metal on metal total hip replacements. Front. Bioeng. Biotechnol. Conference Abstract: 10th World Biomaterials Congress. doi: 10.3389/conf.FBIOE.2016.01.01094 Copyright: The abstracts in this collection have not been subject to any Frontiers peer review or checks, and are not endorsed by Frontiers. They are made available through the Frontiers publishing platform as a service to conference organizers and presenters. The copyright in the individual abstracts is owned by the author of each abstract or his/her employer unless otherwise stated. Each abstract, as well as the collection of abstracts, are published under a Creative Commons CC-BY 4.0 (attribution) licence (https://creativecommons.org/licenses/by/4.0/) and may thus be reproduced, translated, adapted and be the subject of derivative works provided the authors and Frontiers are attributed. For Frontiersâ terms and conditions please see https://www.frontiersin.org/legal/terms-and-conditions. Received: 27 Mar 2016; Published Online: 30 Mar 2016. * Correspondence: Dr. Anna Panagiotidou, UCL, Institute of Orthopaedics, London, United Kingdom, [email protected] Dr. Jayantilal M Meswania, UCL, Institute of Orthopaedics, London, United Kingdom, [email protected] Dr. Osman Khabab, UCL, Institute of Orthopaedics, London, United Kingdom, [email protected] Dr. John Skinner, UCL, Institute of Orthopaedics, London, United Kingdom, [email protected] Dr. Fares Haddad, University College Hospital, London, United Kingdom, [email protected] Dr. Gordon Blunn, UCL, Institute of Orthopaedics, London, United Kingdom, [email protected] Login Required This action requires you to be registered with Frontiers and logged in. To register or login click here. Abstract Info Abstract The Authors in Frontiers Anna Panagiotidou Jayantilal M Meswania Osman Khabab Alister Hart John Skinner Fares Haddad Gordon Blunn Google Anna Panagiotidou Jayantilal M Meswania Osman Khabab Alister Hart John Skinner Fares Haddad Gordon Blunn Google Scholar Anna Panagiotidou Jayantilal M Meswania Osman Khabab Alister Hart John Skinner Fares Haddad Gordon Blunn PubMed Anna Panagiotidou Jayantilal M Meswania Osman Khabab Alister Hart John Skinner Fares Haddad Gordon Blunn Related Article in Frontiers Google Scholar PubMed Abstract Close Back to top Javascript is disabled. Please enable Javascript in your browser settings in order to see all the content on this page.