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Rheological behavior of an artificial synovial fluid : influence of temperature, shear rate and pressure

Titelangaben

Rothammer, Benedict ; Marian, Max ; Rummel, Florian ; Schröder, Stefan ; Uhler, Maximilian ; Kretzer, J. Philippe ; Tremmel, Stephan ; Wartzack, Sandro:
Rheological behavior of an artificial synovial fluid : influence of temperature, shear rate and pressure.
In: Journal of the Mechanical Behavior of Biomedical Materials. Bd. 115 (März 2021) . - No. 104278.
ISSN 1878-0180
DOI: https://doi.org/10.1016/j.jmbbm.2020.104278

Abstract

Despite the excellent clinical performance of joint replacements, wear-induced aseptic loosening is a main cause of premature implant failure. Tribological testing is usually carried out using bovine serum as an artificial synovial fluid. In order to gain new insights into the suitability to simulate human synovial fluid and provide recommendations for the conditions of tribological testing, accurate rheological measurements on the influence of temperature, shear rate and pressure on density and viscosity were performed. Thus, a temperature dependence of density and viscosity could be verified, whereas both values decreased with higher temperatures. The temperature dependency of viscosity could be approximated by an Arrhenius model. Moreover, shear-thinning characteristics could be demonstrated and fitted to a Cross model, which agreed well with investigations on human synovial fluid reported in literature. Furthermore, an anomaly of pressure dependence of viscosity was found and correlated with the behavior of water as a main constituent. At room temperature, the viscosity initially decreased to a minimum and then increased again as a function of pressure. This was no longer distinct at human body temperatures. Consequently, the present study confirms the suitability of bovine serum as a substitute synovial fluid and emphasizes the importance of realistic testing conditions in order to ensure transferability and comparability.<br

Weitere Angaben

Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Keywords: Bovine serum; Biomedical rheology; Temperature dependence; Shear-thinning; Pressure dependence
Institutionen der Universität: Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Konstruktionslehre/CAD
Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Konstruktionslehre/CAD > Lehrstuhl Konstruktionslehre/CAD - Univ.-Prof. Dr.-Ing. Stephan Tremmel
Profilfelder > Advanced Fields > Neue Materialien
Profilfelder > Emerging Fields > Lebensmittel- und Gesundheitswissenschaften
Fakultäten
Fakultäten > Fakultät für Ingenieurwissenschaften
Profilfelder
Profilfelder > Advanced Fields
Profilfelder > Emerging Fields
Titel an der UBT entstanden: Nein
Themengebiete aus DDC: 600 Technik, Medizin, angewandte Wissenschaften > 610 Medizin und Gesundheit
600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften
Eingestellt am: 18 Dec 2020 08:26
Letzte Änderung: 26 Jul 2022 11:22
URI: https://eref.uni-bayreuth.de/id/eprint/61285