Publication detail

The impact of surface and geometry on coefficient of friction of artificial hip joints

CHOUDHURY, D. VRBKA, M. MAMAT, A.B. STAVNESS, I. ROY, CH.K. MOOTANAH, R. KŘUPKA, I.

Czech title

Vliv geometrie a topografie třecích povrchů umělých náhrad kyčelního kloubu na součinitel tření

English title

The impact of surface and geometry on coefficient of friction of artificial hip joints

Type

journal article in Web of Science

Language

en

Original abstract

Coefficient of friction (COF) tests were conducted on 28-mm and 36-mm-diameter hip joint prostheses for four different material combinations, with or without the presence of Ultra High Molecular Weight Polyethylene (UHMWPE) particles using a novel pendulum hip simulator. The effects of three micro dimpled arrays on femoral head against a polyethylene and a metallic cup were also investigated. Clearance played a vital role in the COF of ceramic on polyethylene and ceramic on ceramic artificial hip joints. Micro dimpled metallic femoral heads yielded higher COF against a polyethylene cup; however, with metal on metal prostheses the dimpled arrays significantly reduced the COF. In situ images revealed evidence that the dimple arrays enhanced film formation, which was the main mechanism that contributed to reduced friction.

Czech abstract

Článek se zabývá analýzou součinitele tření kyčelních náhrad s nominálním průměrem 28 a 36 mm, přičemž je zkoumáno několik materiálových kombinací, včetně přítomnosti částic opotřebení v kontaktu. V článku je studován také vliv cílené modifikace topografie třecích povrchů na součinitel tření a tloušťku mazacího filmu.

English abstract

Coefficient of friction (COF) tests were conducted on 28-mm and 36-mm-diameter hip joint prostheses for four different material combinations, with or without the presence of Ultra High Molecular Weight Polyethylene (UHMWPE) particles using a novel pendulum hip simulator. The effects of three micro dimpled arrays on femoral head against a polyethylene and a metallic cup were also investigated. Clearance played a vital role in the COF of ceramic on polyethylene and ceramic on ceramic artificial hip joints. Micro dimpled metallic femoral heads yielded higher COF against a polyethylene cup; however, with metal on metal prostheses the dimpled arrays significantly reduced the COF. In situ images revealed evidence that the dimple arrays enhanced film formation, which was the main mechanism that contributed to reduced friction.

Keywords in Czech

Endoprotéza kyčelního kloubu; Mikro dent; Součinitel tření; Utváření mazacího filmu; Velikost a vůle

Keywords in English

Hip joint prosthesis; micro dimple; Coefficient of friction; Lubrication film formation; Size and clearance

Released

01.08.2017

Publisher

Elsevier

Location

Amsterdam, The Netherlands

ISSN

1751-6161

Volume

72

Number

8

Pages from–to

192–199

Pages count

8

BIBTEX


@article{BUT137567,
  author="Dipankar {Choudhury} and Martin {Vrbka} and Ivan {Křupka},
  title="The impact of surface and geometry on coefficient of friction of artificial hip joints",
  year="2017",
  volume="72",
  number="8",
  month="August",
  pages="192--199",
  publisher="Elsevier",
  address="Amsterdam, The Netherlands",
  issn="1751-6161"
}