Wear behavior of γ-irradiated ultra high-molecular weight polyethylene in a hip joint simulator

2014 ◽  
Vol 29 (2) ◽  
pp. 249-259 ◽  
Author(s):  
N Mohamad Raffi ◽  
D Kanagarajan ◽  
V Srinivasan
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Hip Joint ◽  
Wear Behavior ◽  
Ultra High Molecular Weight ◽  
Hip Joint Simulator

Comparison of wear of ultra-high molecular weight polyethylene acetabular cups against surface-engineered femoral heads

2008 ◽  
Vol 222 (7) ◽  
pp. 1073-1080 ◽  
Author(s):  
A Galvin ◽  
C Brockett ◽  
S Williams ◽  
P Hatto ◽  
A Burton ◽  
...  
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Hip Joint ◽  
Vapour Deposition ◽  
Polyethylene Wear ◽  
Chemical Vapour ◽  
Alumina Ceramic ◽  
Femoral Heads ◽  
Ultra High Molecular Weight ◽  
Hip Joint Simulator

Alumina ceramic heads have been previously shown to reduce polyethylene wear in comparison to cobalt chrome (CoCr) heads in artificial hip joints. However, there are concerns about the brittle nature of ceramics. It is therefore of interest to investigate ceramic-like coatings on metallic heads. The aim of this study was to compare the friction and wear of ultra-high molecular weight polyethylene (UHMWPE) against alumina ceramic, CoCr, and surface-engineered ceramic-like coatings in a friction simulator and a hip joint simulator. All femoral heads tested were 28 mm diameter and included: Biolox™ Forte alumina, CoCr, arc evaporative physical vapour deposition (AEPVD) chromium nitride (CrN) coated CoCr, plasma-assisted chemical vapour deposition (PACVD) amorphous diamond-like carbon (aDLC) coated CoCr, sputter CrN coated CoCr, reactive gas controlled arc (RGCA) AEPVD titanium nitride (TiN) coated CoCr, and Graphit-iC™ coated CoCr. These were articulated against UHMWPE acetabular cups in a friction simulator and a hip joint simulator. Alumina and CoCr gave the lowest wear volumes whereas the sputter coated CrN gave the highest. Alumina also had the lowest friction factor. There was an association between surface parameters and wear. This study indicates that surface topography of surface-engineered femoral heads is more important than friction and wettability in controlling UHMWPE wear.

Biotribology Behavior of Ultra-High Molecular Weight Polyethylene against Carbon/Carbon Composites Used for Hip Joint Replacement

2011 ◽  
Vol 685 ◽  
pp. 327-330
Author(s):  
Lei Lei Zhang ◽  
He Jun Li ◽  
Ke Zhi Li ◽  
Ling Jun Guo ◽  
Wei Feng Cao ◽  
...  
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Hip Joint ◽  
Wear Behavior ◽  
Calf Serum ◽  
Wear Particles ◽  
Acetabular Cup ◽  
Hip Joint Replacement ◽  
Worn Surface ◽  
Ultra High Molecular Weight

In order to investigate the biotribology behavior of a novel artificial joint pair composed of a carbon/carbon composite femoral head and an ultra-high molecular weight polyethylene (UHMWPE) acetabular cup, a hip joint simulator was employed to predict the clinical wear behavior with a constant load and a lubricant of newborn calf serum. The worn surface and the wear particles generated were analyzed by scanning electron microscopy and laser particle size analyzer. The results showed that the worn surface of UHMWPE had a ripple-like morphology with plentiful furrows. The wear particles generated had various morphologies with a size concentrated at about 15 μm.

Wear Behaviour and Wear Debris Characterization of UHMWPE on Alumina Ceramic, Stainless Steel, CoCrMo and Ti6Al4V Hip Prostheses in a Hip Joint Simulator

2010 ◽  
Vol 7 ◽  
pp. 7-25 ◽  
Author(s):  
Shi Bo Wang ◽  
Shi Rong Ge ◽  
Hong Tao Liu ◽  
Xiao Long Huang
Keyword(s):  
Molecular Weight ◽  
Stainless Steel ◽  
Size Distribution ◽  
High Molecular Weight ◽  
Hip Joint ◽  
Wear Debris ◽  
Wear Behavior ◽  
Debris Particles ◽  
Directional Motion ◽  
Ultra High Molecular Weight

Ultra-high molecular-weight polyethylene (UHMWPE) has been used in total hip replacement for the last three decades. Despite the advancements in prosthesis design, the wear of UHMWPE remains a serious clinical problem; the release of wear debris may induce osteolysis and implant loosening. Understanding of wear behavior and wear debris morphology of the polyethylene is essential to improve the reliability of hip joint implants. The investigation in this paper carried out wear simulation tests of UHMWPE on Al2O3, 316L stainless steel, CoCrMo alloy and Ti6Al4V alloy, respectively. The lubrication of plasma solution and bovine serum solution was presented in wear tests. The effect of motion and loading on the wear behavior and wear debris morphology, and the influence of femoral head material and assembly style were studied in order to obtain a better understanding of the morphology of ultra-high molecular weight polyethylene wear particles. It is shown that the wear of UHMWPE acetabular cups against metal femoral heads was significantly higher than that against ceramic heads. The presence of protein in lubricant increases the wear of UHMWPE acetabular cups on Al2O3 heads. The wear rates of UHMWPE in multi-directional motion are approximately 2.5 times of those in uni-directional motion. The size distribution range of the UHMWPE debris particles for all head materials varies from submicron particles up to several hundreds micron. The size distribution range of wear debris particles is not directly related to wear resistance of UHMWPE, but significantly influenced by wear mechanisms. The UHMWPE debris particles produced in hip wear simulation tests are classified as round debris, flake-like debris and stick debris, which are closely related to the primary mechanisms of abrasive wear, adhesive wear and fatigue wear.

Wear of ultra-high molecular weight polyethylene acetabular cups in a physiological hip joint simulator in the anatomical position using bovine serum as a lubricant

1997 ◽  
Vol 211 (3) ◽  
pp. 265-269 ◽  
Author(s):  
R J A Bigsby ◽  
C S Hardaker ◽  
J Fisher
Keyword(s):  
Molecular Weight ◽  
Stainless Steel ◽  
High Molecular Weight ◽  
Hip Joint ◽  
Bovine Serum ◽  
Clinical Results ◽  
Zirconia Ceramic ◽  
Wear Rates ◽  
Ultra High Molecular Weight ◽  
Hip Joint Simulator

The Leeds physiological anatomical (PA) hip joint simulator was developed to apply three axes of loading and a complex three-dimensional motion so that the forces and motions can reproduce exactly the walking cycles defined by Paul. This paper presents the results of a study using the Leeds PA hip joint simulator to determine the wear of 32 mm ultra-high molecular weight polyethylene (UHMWPE) acetabular cups against stainless steel and zirconia ceramic heads, using bovine serum as lubricant. These results have been compared with the results of a previous study that used water as the lubricant, which led to UHMWPE transfer film being formed on the stainless steel head. Comparisons are also made with clinical results and results from other simulators. The study indicates that it is preferable to use bovine serum in simulator studies. In addition, the results indicate that if the surface roughness of the metallic and femoral heads are similar, and they remain undamaged during the tests, the wear rates of the UHMWPE cups are likely to be similar.

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