Tribology Letters

, Volume 37, Issue 1, pp 23–29

Determination of Low Wear Rates in Metal-On-Metal Hip Joint Replacements Based on Ultra Trace Element Analysis in Simulator Studies

  • J. P. Kretzer
  • M. Krachler
  • J. Reinders
  • E. Jakubowitz
  • M. Thomsen
  • C. Heisel
Original Paper

DOI: 10.1007/s11249-009-9486-7

Cite this article as:
Kretzer, J.P., Krachler, M., Reinders, J. et al. Tribol Lett (2010) 37: 23. doi:10.1007/s11249-009-9486-7

Abstract

Metal-on-metal joint bearings are being increasingly used for total hip arthroplasty. Previous results from simulator tests to determine wear of metal-on-metal bearings exhibited high fluctuations. Consequently, wear tests had to be performed for a long period of time to achieve stable values. The aim of this study was to establish a method for the precise measurement of wear of metal-on-metal bearings. Wear was determined by analyzing the concentrations of particles and selected elements in the test medium (serum) using high resolution-inductively coupled plasma-mass spectrometry (HR-ICP-MS). The procedure was first validated and compared to gravimetric measurements on two different implant designs and then applied in wear tests on four total hip resurfacing implants. The validation showed a significant reliability of the HR-ICP-MS method (p ≤ 0.02). The final wear test revealed that the HR-ICP-MS method can precisely detect very low wear rates and accurately characterize alterations in wear progression. The duration of simulation can be reduced due to the high detection power and low fluctuation in HR-ICP-MS wear determination analyses. This approach is suitable for test implants with extremely low wear rates.

Keywords

Chemical analytical techniques Human joints Replacements Biotribology Wear/failure testing devices 

List of Symbols

CI

95%-confidence interval

Co

Cobalt

Cr

Chromium

cyc

Cycles

EDTA

Ethylene diamine tetraacetic acid

EDX

Energy dispersive X-ray analysis

HR-ICP-MS

High resolution-inductively coupled plasma-mass spectrometer

H2O2

Hydrogen peroxide

ICC

Intraclass correlation coefficient

Mo

Molybdenum

MoM

Metal-on-metal

NaN3

Sodium azide

HNO3

Nitric acid

p

p-value

PA

Polyamide

PU

Polyurethane

PVC

Polyvinyl chloride

r

Linear coefficient of correlation

RI

Run-in wear rate [mm3/106 cyc]

SD

Standard deviation

SS

Steady-state wear rate [mm3/106 cyc]

\( \overline{\text{x}} \)

Mean

Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  • J. P. Kretzer
    • 1
  • M. Krachler
    • 2
  • J. Reinders
    • 1
  • E. Jakubowitz
    • 1
  • M. Thomsen
    • 3
  • C. Heisel
    • 4
  1. 1.Laboratory of Biomechanics and Implant Research, Department of OrthopaedicsUniversity of HeidelbergHeidelbergGermany
  2. 2.Institute of Earth SciencesUniversity of HeidelbergHeidelbergGermany
  3. 3.German Red Cross HospitalBaden-BadenGermany
  4. 4.ARCUS SportklinikPforzheimGermany

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