Publication detail

MAPPING OF LUBRICATING FILM THICKNESS IN HUMAN HIP JOINT REPLACEMENTS

BOSÁK, D. LAŠTŮVKA, J. VRBKA, M. NÁVRAT, T. HARTL, M. KŘUPKA, I.

Czech title

MAPOVÁNÍ MAZACÍHO FILMU V NÁHRADÁCH KYČELNÍHO KLOUBU

English title

MAPPING OF LUBRICATING FILM THICKNESS IN HUMAN HIP JOINT REPLACEMENTS

Type

journal article - other

Language

en

Original abstract

This paper describes experimental mapping of lubricating film thickness and mechanism of its forming in contact of CoCrMo femoral head with a diameter of 28 mm and a glass disc with presence of bovine serum as a substitute of synovial fluid occurred in a natural joint. The contact area was illuminated by a xenon lamp and recorded by a high-speed camera. The load applied to the contact area was 5 N corresponding with the contact pressure of 271 MPa. Obtained data was evaluated by a thin film colorimetric interferometry. A pure rolling and partial sliding measurements were examined. From observed interferograms is apparent the deposition of proteins to the glass disc and femoral head surfaces, denaturation and formation of protein aggregations affecting the residual lubricating film thickness. The basic mechanisms of protein film forming were brought out and it is apparent that forming of protein lubricating film is a complex mechanism containing more influences.

Czech abstract

Uvedený článek se zabývá experimentální analýzou tloušťky mazacího filmu v náhradách kyčelního kloubu. Kloubní tekutina je modelována pomocí hovězího séra. Experimentální metoda je založena na kolorimetrické interferometrii.

English abstract

This paper describes experimental mapping of lubricating film thickness and mechanism of its forming in contact of CoCrMo femoral head with a diameter of 28 mm and a glass disc with presence of bovine serum as a substitute of synovial fluid occurred in a natural joint. The contact area was illuminated by a xenon lamp and recorded by a high-speed camera. The load applied to the contact area was 5 N corresponding with the contact pressure of 271 MPa. Obtained data was evaluated by a thin film colorimetric interferometry. A pure rolling and partial sliding measurements were examined. From observed interferograms is apparent the deposition of proteins to the glass disc and femoral head surfaces, denaturation and formation of protein aggregations affecting the residual lubricating film thickness. The basic mechanisms of protein film forming were brought out and it is apparent that forming of protein lubricating film is a complex mechanism containing more influences.

Keywords in Czech

Biotribologie, Hovězí sérum, Tloušťka filmu, Umělý kyčelní kloub, Kolorimetrická interferometrie

Keywords in English

Biotribology, Bovine serum, Film thickness, Artificial hip joint, Colorimetric interferometry

RIV year

2012

Released

12.12.2012

Publisher

MM Science Journal

Location

Praha

ISSN

1803-1269

Volume

2012

Number

12

Pages from–to

378–381

Pages count

4

BIBTEX


@article{BUT96674,
  author="Dalibor {Bosák} and Jan {Laštůvka} and Martin {Vrbka} and Tomáš {Návrat} and Martin {Hartl} and Ivan {Křupka},
  title="MAPPING OF LUBRICATING FILM THICKNESS IN HUMAN HIP JOINT REPLACEMENTS",
  year="2012",
  volume="2012",
  number="12",
  month="December",
  pages="378--381",
  publisher="MM Science Journal",
  address="Praha",
  issn="1803-1269"
}