Bio-tribocorrosion mechanisms in orthopaedic devices: Mapping the micro-abrasion–corrosion behaviour of a simulated CoCrMo hip replacement in calf serum solution

Load bearing implant prostheses such as orthopaedic hip and knee implants may be considered as tribocorrosion systems since the wear processes are a result of combined mechanical and chemical mechanisms. The long-term success of implant prostheses depends on a number of factors, including age, body...

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Bibliographic Details
Published in:Wear 2014-08, Vol.316 (1-2), p.58-69
Main Authors: Sadiq, K., Black, R.A., Stack, M.M.
Format: Article
Language:English
Subjects:
Bio-tribocorrosion
Biological and medical sciences
Calf serum
CoCrMo
Devices
Hip replacement
Medical sciences
Polyethylenes
Prostheses
Prosthetics
Radiotherapy. Instrumental treatment. Physiotherapy. Reeducation. Rehabilitation, orthophony, crenotherapy. Diet therapy and various other treatments (general aspects)
Serums
Simulation
Surgical implants
Technology. Biomaterials. Equipments. Material. Instrumentation
Tribocorrosion maps
Wear
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Summary:Load bearing implant prostheses such as orthopaedic hip and knee implants may be considered as tribocorrosion systems since the wear processes are a result of combined mechanical and chemical mechanisms. The long-term success of implant prostheses depends on a number of factors, including age, body weight and activity levels. Pre-clinical testing is therefore crucial in determining the long-term performance, safety and reliability of the implant in-vivo. In this study a CoCrMo alloy - UHMWPE couple were tested in a physiological solution of foetal calf serum (FCS) in 0.9wt% NaCl to assess the underlying wear mechanisms as a result of applied load (0–5N) and applied potential (−600, −400, −200, 0 and +200mV). The transitioning behaviours due to micro-abrasion and corrosion were studied; corresponding micro-abrasion–corrosion wear maps were constructed to indicate the mass loss transitions in scope of wastage, mechanisms of wear and synergies between abrasion–corrosion for simulated hip contact conditions. •The micro-abrasion–corrosion of CoCr in a physiological solution was investigated.•Wastage, mechanism and synergism wear maps have been developed.•Wear maps showed the micro-abrasion–corrosion transition behaviours.•This is an extensive study linking wear mapping to electrochemical data.•Wear was inhibited at lower loads due to the presence of denatured protein film.
ISSN:0043-1648
1873-2577
DOI:10.1016/j.wear.2014.04.016