Publication detail

In Situ Observation of Lubricant Film Formation in THR Considering Real Conformity: The Effect of Model Synovial Fluid Composition

NEČAS, D. VRBKA, M. REBENDA, D. GALLO, J. GALANDÁKOVÁ, A. WOLFOVÁ, L. KŘUPKA, I. HARTL, M.

Czech title

In-situ pozorování utváření mazacího filmu v náhradách kyčelního kloubu při uvažování reálné konformity: vliv složení modelové synoviální kapaliny

English title

In Situ Observation of Lubricant Film Formation in THR Considering Real Conformity: The Effect of Model Synovial Fluid Composition

Type

journal article in Web of Science

Language

en

Original abstract

The present paper explores the effect of synovial fluid composition on lubricant film formation in hip replacements. The measurements were realized utilizing pendulum hip joint simulator, while the film thickness was evaluated using optical interferometry. Contact couples consisted of metal and ceramic femoral heads articulating with glass acetabular cups. As the test lubricants, various model fluids were employed. Initially, static tests, aimed on the effect of material and load on adsorption, were conducted. It was found that adsorbed film thickness increases independently of the head material. Consequently, swinging flexion-extension experiments were realized, revealing that the film formation is substantially affected by composition of model fluid. The thickest film was observed when higher concentration of hyaluronic acid and phospholipids was applied.

Czech abstract

Tento článek objasňuje vliv složení synoviální kapaliny na formování mazacího filmu v kyčelních náhradách. Měření byla realizována s využitím kyvadlového simulátoru, přičemž tloušťka filmu byla vyhodnocena s využitím optické interferometrie. Kontaktní dvojice se skládaly z kovových a keramických femorálních hlavic artikulujících se skelněnými jamky. Jako testovací maziva byly využity různé modelové kapaliny. Nejprve byly realizovány statické testy zaměřené na vliv materiálu a zatížení na adsorpci proteinů. Bylo zjištěno, že tloušťka adsorbovaného filmu narůstá nezávisle na materiálu hlavice. Následně byly realizovány dynamické testy simulující flexi-extenzi, kdy se ukázalo, že formování filmu je významně ovlivněno složením modelové kapaliny. Nejtlustší film byl zaznamenán v případě kapaliny s vyšším obsahem kyseliny hyaluronové a fosfolipidů.

English abstract

The present paper explores the effect of synovial fluid composition on lubricant film formation in hip replacements. The measurements were realized utilizing pendulum hip joint simulator, while the film thickness was evaluated using optical interferometry. Contact couples consisted of metal and ceramic femoral heads articulating with glass acetabular cups. As the test lubricants, various model fluids were employed. Initially, static tests, aimed on the effect of material and load on adsorption, were conducted. It was found that adsorbed film thickness increases independently of the head material. Consequently, swinging flexion-extension experiments were realized, revealing that the film formation is substantially affected by composition of model fluid. The thickest film was observed when higher concentration of hyaluronic acid and phospholipids was applied.

Keywords in Czech

Náhrada kyčelního kloubu; mazací film; synoviální kapalina; kyselina hyaluoronová

Keywords in English

Total hip arthroplasty; lubricant film; synovial fluid; hyaluronic acid

Released

01.01.2018

Publisher

Elsevier Ltd.

Location

United Kingdom

ISSN

0301-679X

Volume

117

Number

1

Pages from–to

206–216

Pages count

11

BIBTEX


@article{BUT139210,
  author="David {Nečas} and Martin {Vrbka} and David {Rebenda} and Ivan {Křupka} and Martin {Hartl},
  title="In Situ Observation of Lubricant Film Formation in THR Considering Real Conformity: The Effect of Model Synovial Fluid Composition ",
  year="2018",
  volume="117",
  number="1",
  month="January",
  pages="206--216",
  publisher="Elsevier Ltd.",
  address="United Kingdom",
  issn="0301-679X"
}