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"
}