Publication detail

Running-in friction of hip joint replacements can be significantly reduced: The effect of surface-textured acetabular cup

NEČAS, D. USAMI, H. NIIMI, T. SAWAE, Y. KŘUPKA, I. HARTL, M.

Original Title

Running-in friction of hip joint replacements can be significantly reduced: The effect of surface-textured acetabular cup

Type

journal article in Web of Science

Language

English

Original Abstract

Hip joint replacements represent the most effective way of treatment for patients suffering from joint diseases. Despite the rapid improvement of implant materials over the last few decades, limited longevity associated with wear-related complications persists as the main drawback. Therefore, improved tribological performance is required in order to extend the service life of replacements. The effect of surface texturing of UHMWPE acetabular cup was investigated in the present study. Unique tilling method was utilized for manufacturing the dimples with controlled diameter and depths on the contact surface of the cup. The experiments with four commercial femoral components and two model lubricants were realized. The main attention was paid to a coefficient of friction considering the differences between the original and the dimpled cups. Results showed remarkable lowering of friction, in general. Focusing on the simulated human synovial fluid, friction was reduced by 40% (alumina ceramic), 38.8% (zirconia toughened ceramic), 25.5% (metal), and 9.9% (oxinium). In addition, the dimples helped to keep the friction stable without fluctuations. To conclude, the paper brings a new insight into frictional behaviour of the hip replacements during running-in phase which is essential for overall implant lifespan. It is believed that proper surface texturing may rapidly improve the life quality of millions of patients and may lead to considerable financial savings.

Keywords

Hip joint replacement; friction; texturing; dimple; longevity

Authors

NEČAS, D.; USAMI, H.; NIIMI, T.; SAWAE, Y.; KŘUPKA, I.; HARTL, M.

Released

1. 12. 2020

Publisher

Springer

Location

Švýcarsko

ISBN

2223-7690

Periodical

Friction

Year of study

8

Number

6

State

People's Republic of China

Pages from

1137

Pages to

1152

Pages count

16

URL

https://link.springer.com/article/10.1007/s40544-019-0351-x

Full text in the Digital Library

http://hdl.handle.net/11012/194774

BibTex

@article{BUT162436,
  author="NEČAS, D. and USAMI, H. and NIIMI, T. and SAWAE, Y. and KŘUPKA, I. and HARTL, M.",
  title="Running-in friction of hip joint replacements can be significantly reduced: The effect of surface-textured acetabular cup",
  journal="Friction",
  year="2020",
  volume="8",
  number="6",
  pages="1137--1152",
  doi="10.1007/s40544-019-0351-x",
  issn="2223-7690",
  url="https://link.springer.com/article/10.1007/s40544-019-0351-x"
}