Detail publikace

On the observation of lubrication mechanisms within hip joint replacements. Part II: Hard-on-hard bearing pairs

NEČAS, D. VRBKA, M. GALLO, J. KŘUPKA, I. HARTL, M.

Originální název

On the observation of lubrication mechanisms within hip joint replacements. Part II: Hard-on-hard bearing pairs

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

The present paper represents Part II of the extensive study focused on the lubrication of hip joint replacements. The main goal is to assess the fundamentals of lubrication considering both hard-on-soft (Part I) and hard-on-hard (Part II) bearing pairs. In addition, the effect of individual constituents contained in the model fluid is clarified. For this purpose, multiple model fluids of various composition were employed. In this part of the study, metal-on-glass contact representing hard bearing pairs was observed in situ using pendulum hip joint simulator in combination with thin film colorimetric interferometry method. The designed test consists of initial static loading/unloading phase for the determination of adsorption of molecules on rubbing surfaces. This period is followed by swinging of the pendulum and latest static part under constant load. Three groups of measurements were carried out while fourteen different lubricants were tested. Initially, the experiments were performed with albumin-based model fluid. In that case a substantial positive effect of hyaluronic acid was identified. In contrast, the fluids with γ-globulin as a base constituent showed improved lubrication conditions when phospholipids were added to the solution. Finally, considering the complex fluid, a combined effect of hyaluronic acid and phospholipids caused a better endurance of the lubricant film. The latest part of the paper aims on the comparison of film formation considering hard and soft pairs, highlighting some clear differences. In general, hard pairs exhibit clear decreasing tendency of the film during swinging motion while opposite behaviour was observed for soft pairs.

Klíčová slova

Hip joint replacements; Hard-on-hard pairs; Lubrication; Optical interferometry; Synovial fluid

Autoři

NEČAS, D.; VRBKA, M.; GALLO, J.; KŘUPKA, I.; HARTL, M.

Vydáno

1. 1. 2019

Nakladatel

Elsevier

Místo

Nizozemsko

ISSN

1751-6161

Periodikum

Journal of the mechanical behavior of biomedical materials

Ročník

89

Číslo

1

Stát

Nizozemsko

Strany od

249

Strany do

259

Strany počet

11

URL

https://www.sciencedirect.com/science/article/pii/S1751616118310294

BibTex

@article{BUT150451,
  author="NEČAS, D. and VRBKA, M. and GALLO, J. and KŘUPKA, I. and HARTL, M.",
  title="On the observation of lubrication mechanisms within hip joint replacements. Part II: Hard-on-hard bearing pairs",
  journal="Journal of the mechanical behavior of biomedical materials",
  year="2019",
  volume="89",
  number="1",
  pages="249--259",
  doi="10.1016/j.jmbbm.2018.09.026",
  issn="1751-6161",
  url="https://www.sciencedirect.com/science/article/pii/S1751616118310294"
}