Publication detail

Mechanical Wear and Oxidative Degradation Analysis of Retrieved Ultra High Molecular Weight Polyethylene Acetabular Cups

CHOUDHURY, D. RANUŠA, M. FLEMING, R. A. VRBKA, M. KŘUPKA, I. TEETER M. G. GOSS, J. ZOU, M.

Original Title

Mechanical Wear and Oxidative Degradation Analysis of Retrieved Ultra High Molecular Weight Polyethylene Acetabular Cups

Type

journal article in Web of Science

Language

English

Original Abstract

The number of revision joint replacements has been increasing substantially over the last few years. Understanding their failure mechanism is extremely important for improving the design and material selection of current implants. This study includes ten retrieved and four new mildly cross-linked ultra-high molecular weight polyethylene (UHMWPE) acetabular liners. Among them, most of the prostheses (n=5) were reported to be revised and replaced due to aseptic loosening, followed by painful joint (n=2), dislocation (n=1), and intra articular ossification (n=1) and combination of wear (liner) and osteolysis (stem). Surface deviations (wear, material inflation and roughness), oxidative degradation and change of material properties were measured using micro-computer topography (micro-CT) scan, 3D laser scanning microscopy, Raman spectroscopy and nanoindentation, respectively. Prostheses having eccentric worn areas had much higher linear wear rates (228.011 ± 35.51 µm/year) compared to that of centrically worn prostheses (96.706 ± 10.83 µm/year). Oxidation index (OI) showed similar trends to the surface penetration depth. Among them, sample 10 exhibited the highest OI across the contact area and the rim of the cup liners. It also had the lowest hardness/elasticity ratio. Overall, wear and creep, oxidative degradation and reduced hardness/elasticity ratio all contributed to the premature failure of the UHMWPE acetabular cup liners.

Keywords

Retrieved prosthesis, Wear, Oxidative degradation, plasticity index, micro-CT, Raman spectroscopy, nanoindentation

Authors

CHOUDHURY, D.; RANUŠA, M.; FLEMING, R. A.; VRBKA, M.; KŘUPKA, I.; TEETER M. G.; GOSS, J.; ZOU, M.

Released

6. 1. 2018

Publisher

Elsevier

Location

Nizozemsko

ISBN

1751-6161

Periodical

Journal of the mechanical behavior of biomedical materials

Year of study

79

Number

1

State

Kingdom of the Netherlands

Pages from

314

Pages to

323

Pages count

10

URL

https://www.sciencedirect.com/science/article/pii/S1751616118300031?via%3Dihub

BibTex

@article{BUT144870,
  author="CHOUDHURY, D. and RANUŠA, M. and FLEMING, R. A. and VRBKA, M. and KŘUPKA, I. and TEETER M. G. and GOSS, J. and ZOU, M.",
  title="Mechanical Wear and Oxidative Degradation Analysis of Retrieved Ultra High Molecular Weight Polyethylene Acetabular Cups",
  journal="Journal of the mechanical behavior of biomedical materials",
  year="2018",
  volume="79",
  number="1",
  pages="314--323",
  doi="10.1016/j.jmbbm.2018.01.003",
  issn="1751-6161",
  url="https://www.sciencedirect.com/science/article/pii/S1751616118300031?via%3Dihub"
}