Publication detail

Lubrication within hip replacements – Implication for ceramic-on-hard bearing couples

NEČAS, D. VRBKA, M. KŘUPKA, I. HARTL, M. GALANDÁKOVÁ, A.

Original Title

Lubrication within hip replacements – Implication for ceramic-on-hard bearing couples

Type

journal article in Web of Science

Language

English

Original Abstract

The objective of the present study is to clarify the lubrication processes within artificial joints considering the ceramic femoral heads focusing on the role of particular proteins. Two optical methods were employed; colorimetric interferometry and fluorescent microscopy. The experiments were conducted in ball-on-disc configuration, where the ball is made from ceramic (SuloxTM, BIOLOX®delta) and the disc from optical glass. The measurements were realized under pure rolling, partial negative and partial positive sliding, to get a complex information about the protein film behaviour under various conditions. Moreover, two different speeds were investigated; 5.7 and 22 mm/s, respectively. The contact was lubricated by saline solutions containing albumin and γ-globulin in a ratio 2:1, while the total protein concentration was 10.5 mg/ml. Under pure rolling conditions, the film thickness gradually increases with time/rolling distance independently of material and rolling speed, while the dominant fluid constituent is albumin. In the case of negative sliding, the film formation is time/distance/speed dependent. At lower speed, both proteins contribute to film thickness; at higher speed, the effect of γ-globulin is not substantial. When the disc is faster, the character of film formation is similar to the metal component in the case of Sulox ceramic. Biolox ceramic shows a different behaviour, while for both materials, the contribution of γ-globulin increases with increasing speed. As most of the results can be well explained in terms of specific proteins, it can be concluded that the experimental approach is suitable for the investigation of protein film formation considering the ceramic materials.

Keywords

Hip replacement; Ceramic; Protein film; Albumin; γ-globulin

Authors

NEČAS, D.; VRBKA, M.; KŘUPKA, I.; HARTL, M.; GALANDÁKOVÁ, A.

Released

1. 8. 2016

Publisher

Elsevier Ltd.

Location

United Kingdom

ISBN

1751-6161

Periodical

Journal of the mechanical behavior of biomedical materials

Year of study

61

Number

8

State

Kingdom of the Netherlands

Pages from

371

Pages to

383

Pages count

13

URL

http://www.sciencedirect.com/science/article/pii/S1751616116300674

BibTex

@article{BUT123591,
  author="NEČAS, D. and VRBKA, M. and KŘUPKA, I. and HARTL, M. and GALANDÁKOVÁ, A.",
  title="Lubrication within hip replacements – Implication for ceramic-on-hard bearing couples",
  journal="Journal of the mechanical behavior of biomedical materials",
  year="2016",
  volume="61",
  number="8",
  pages="371--383",
  doi="10.1016/j.jmbbm.2016.04.003",
  issn="1751-6161",
  url="http://www.sciencedirect.com/science/article/pii/S1751616116300674"
}