UCL Discovery
UCL home » Library Services » Electronic resources » UCL Discovery

Four Station Knee Simulator Wear Testing Comparing Titanium Niobium Nitride with Cobalt Chrome

Blunn GW, MRM; (2013) Four Station Knee Simulator Wear Testing Comparing Titanium Niobium Nitride with Cobalt Chrome. Journal of Bioengineering & Biomedical Science , 03 (03) 10.4172/2155-9538.1000125. Green open access

[thumbnail of four-station-knee-simulator-wear-testing-comparing-titanium-niobium-nitride-with-cobalt-chrome-2155-9538.1000125.pdf] PDF
four-station-knee-simulator-wear-testing-comparing-titanium-niobium-nitride-with-cobalt-chrome-2155-9538.1000125.pdf
Available under License : See the attached licence file.

Download (3MB)

Abstract

A new non-destructive method was applied in order to assess bone integrity. The method is based on measurement of bHypersensitivity to an orthopaedic implant was first published in 1966 and since then, in sensitive patients, is known to cause serious problems in joint replacement surgery. Titanium niobium nitride (TiNbN) can act as a surface coat for knee arthroplasty to “hide” the cobalt chrome (CoCr) femoral component beneath, therefore affording an immunoprivileged state. The aim of this study is to determine the wear properties of titanium niobium nitride against Ultra High Molecular Weight Polyethylene (UHMWPE) compared to cobalt chrome and to examine the metallic alloy surface of knee prostheses after loading cycles using a knee simulator. Three TiNbN coated and one CoCr Vanguard total knee femoral components were articulated against standard UHMWPE grade tibial inserts in the Stanmore-Instron knee simulator. Surface roughness, UHMWPE mass, lowest point, surface profiles and volumetric change were measuredevery one million cycles up to five million cycles. After five million cycles the average roughness of the cobalt chromemedial and lateral femoral condyles was over three times that of the TiNbN coated femoral condyles. There was no obvious difference in weight loss, volume loss or progression of lowest points of the tibial inserts articulating with the TiNbN coated and the cobalt chrome femoral component. Despite a clear reduction in roughness progression over the course of this in vitro test, there was no demonstrable improvement in UHMWPE wear measured gravimetrically or by surface profiling. The TiNbN implant tested may still be of great benefit to patients who are metal sensitive, but the coat offers no benefit in UHMWPE wear.

Type: Article
Title: Four Station Knee Simulator Wear Testing Comparing Titanium Niobium Nitride with Cobalt Chrome
Open access status: An open access version is available from UCL Discovery
DOI: 10.4172/2155-9538.1000125
Publisher version: http://dx.doi.org/10.4172/2155-9538.1000125
Language: English
Additional information: © 2013 Malikian R, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences > Div of Surgery and Interventional Sci
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences > Div of Surgery and Interventional Sci > Department of Ortho and MSK Science
URI: https://discovery.ucl.ac.uk/id/eprint/1469366
Downloads since deposit
331Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item