New Bio-tribo-mineralogical Expertise Protocol for Joint Implant Wear Particles. Application: Medical Diagnostic and Articular Implants Optimisation

2019 ◽  
Author(s):  
V. Massardier ◽  
M. Vincent ◽  
C. Batailler ◽  
S. Lustig ◽  
J. Geringer ◽  
...  
Keyword(s):  
Wear Particles ◽  
Joint Implant ◽  
Medical Diagnostic ◽  
Implant Wear

scholarly journals A simple method of suspending implant wear particles for more physiological modelling of cell-particle interactions in vitro

2021 ◽  
Author(s):  
Christine Poon
Keyword(s):  
Wear Debris ◽  
Culture Media ◽  
Polymeric Materials ◽  
Wear Particle ◽  
Physicochemical Characteristics ◽  
Wear Particles ◽  
Simple Method ◽  
Implant Wear

AbstractArthroplasty implants e.g. hip, knee, spinal disc sustain relatively high compressive loading and friction wear, which lead to the formation of wear particles or debris between articulating surfaces. Despite advances in orthopaedic materials and surface treatments, the production of wear debris from any part of a joint arthroplasty implant is currently unavoidable. Implant wear debris induces host immune responses and inflammation, which causes patient pain and ultimately implant failure through progressive inflammation-mediated osteolysis and implant loosening, where the severity and rate of periprosthetic osteolysis depends on the material and physicochemical characteristics of the wear particles. Evaluating the cytotoxicity of implant wear particles is important for regulatory approved clinical application of arthroplasty implants, as is the study of cell-particle response pathways. However, the wear particles of polymeric materials commonly used for arthroplasty implants tend to float when placed in culture media, which limits their contact with cell cultures. This study reports a simple means of suspending wear particles in liquid medium using sodium carboxymethyl cellulose (NaCMC) to provide a more realistic proxy of the interaction between cells and tissues to wear particles in vivo, which are free-floating in synovial fluid within the joint cavity. Low concentrations of NaCMC dissolved in culture medium were found to be effective for suspending polymeric wear particles. Such suspensions may be used as more physiologically-relevant means for testing cellular responses to implant wear debris, as well as studying the combinative effects of shear and wear particle abrasion on cells in a dynamic culture environments such as perfused tissue-on-chip devices.

scholarly journals A biomechanical study of the effects of simulated ulnar deviation on silicone finger joint implant failure

2016 ◽  
Vol 41 (9) ◽  
pp. 944-947 ◽  
Author(s):  
P. Drayton ◽  
B. W. Morgan ◽  
M. C. Davies ◽  
G. E. B. Giddins ◽  
A. W. Miles
Keyword(s):  
Metacarpophalangeal Joint ◽  
Biomechanical Study ◽  
Implant Failure ◽  
Level Of Evidence ◽  
Ulnar Deviation ◽  
Ringer’S Solution ◽  
Joint Implant ◽  
Cause Of Failure ◽  
Implant Wear

Silicone finger arthroplasties are used widely, especially for metacarpophalangeal joint replacement in patients with inflammatory arthritis. Implant failure is well recognized. The rates of failure in vivo differ substantially from experience in vivo. One cause of failure is felt to be post-operative ulnar deviation. The aim of our study was to test the effect of ulnar deviation testing on silicone finger implants. We tested 12 implants in three groups of four implants. The implants were submerged in a bath of Ringer’s solution at 370 °C throughout the experiment and tested in a rig held in 0°, 10° and 20° deviation. The rig was cycled at 1.5 Hz from 0°–90°. The implants were inspected every 500,000 cycles until a total of 4 million cycles. There was consistently increased wear and supination plastic deformity in going from 0°–20° deviation. This study confirms the adverse effects of ulnar deviation on silicone finger implant wear. It is likely that this combines with lateral pinch forces and sharp bone edges to cause catastrophic silicone implant failure. Level of evidence: III

scholarly journals Understanding the reactivity of CoCrMo-implant wear particles

2018 ◽  
Vol 2 (1) ◽  
Author(s):  
Mohamed A. Koronfel ◽  
Angela E. Goode ◽  
Johanna Nelson Weker ◽  
Stephen E. R. Tay ◽  
Camilla A. Stitt ◽  
...  
Keyword(s):  
Wear Particles ◽  
Implant Wear

scholarly journals A Contact Model for Establishment of Hip Joint Implant Wear Metrics

2014 ◽  
Vol 07 (04) ◽  
pp. 228-242 ◽  
Author(s):  
Mohammad Hodaei ◽  
Kambiz Farhang ◽  
Nazanin Maani
Keyword(s):  
Hip Joint ◽  
Contact Model ◽  
Joint Implant ◽  
Implant Wear

ANALYSIS OF AUTOMATIC TRANSMISSION USING FOURIER TRANSFORM INFRARED (FTIR) SPECTROCOPY

2019 ◽  
Vol 7 (SI-TeMIC18) ◽  
Author(s):  
Norhanifah Abdul Rahman ◽  
Matzaini Katon Katon ◽  
Nurina Alya Zulkifli Zulkifli
Keyword(s):  
Fourier Transform ◽  
Automatic Transmission ◽  
Fourier Transform Infrared ◽  
Oil Analysis ◽  
Wear Particles ◽  
Reliable Technique ◽  
Fluid Analysis ◽  
Analysis Technique ◽  
Machine Elements ◽  
Transmission Fluid

Automatic Transmission (AT) system is efficient in the aspects of vehicle safety, comfort, reliability and driving performance. The objectives of this paper are to collect the oil samples from AT systems of engine bus according to manufacturer's recommendations and analyse collected oil samples using oil analysis technique. The sample transmission fluid which was taken from the AT gearbox has been experimentally analyzed. The oil samples were taken with an interval of 5,000km, 30,000km, 50,000km, 80,000km, 180,000km and 300,000km for AT bus operation. These samples then have been analyzed by comparing between new and used transmission fluid using Fourier Transform Infrared (FTIR) spectroscopy. Oil analysis by FTIR is a form of Predictive Maintenance (PdM) to avoid major failure in machine elements. Most machine elements are not easily accessible in the transmission system. Having a reliable technique would avoid the needs to open the components unnecessarily, hence, help to prevent catastrophic failure which are very costly, and ease of regular monitoring. In order to identify the major failures of automatic gearbox, forecasts can be made regarding the lube transmission fluid analysis test. By using this test, the minor problems can be determined before they become major failures. At the end of this research, the wear particles profile for interval mileage of AT system was obtained. Keywords: Wear, Automatic Transmission (AT), Transmission fluid, Fourier Transform Infrared (FTIR), Oil analysis.

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