Study on Bio-Tribological Properties of Nitrogen Ion Implanted UHMWPE

2005 ◽  
Vol 288-289 ◽  
pp. 649-652 ◽  
Author(s):  
Dang Sheng Xiong
Keyword(s):  
Wear Rate ◽  
Blood Plasma ◽  
Polyethylene Wear ◽  
Ultrahigh Molecular Weight Polyethylene ◽  
Implantation Dose ◽  
Joint Replacements ◽  
Total Joint Replacements ◽  
Ultrahigh Molecular Weight ◽  
Lubrication Condition ◽  
Nitrogen Ion

As the aseptic loosening induced by polyethylene wear debris is the main cause of long-term failure of total joint replacements, increasing the wear resistance of ultrahigh molecular weight polyethylene (UHMWPE) will be very important to obtain long-life artificial joint. In this paper the UHMWPE was implanted with 450 keV N+ ions to three doses of 5×1014/cm2, 2.5×1015/cm2 and 1.25×1016/cm2. The friction and wear behaviors of UHMWPE were studied under lubrication of distilled water and blood plasma using a ball-on-disk tribometer with a ZrO2 ceramic ball as a counterface. Experimental results showed that the friction coefficient of ions implanted UHMWPE are higher than un-implanted UHMWPE. Under blood plasma lubrication condition, the wear rate of implanted UHMWPE was lower than un-implanted UHMWPE, and the wear rate decreased with increasing implantation dose. The plow, plastic deformation and fatigue were wearing mechanism for un-implanted UHMWPE and the abrasive wear for implanted UHMWPE.

Wear Characteristics of Conventional Ultrahigh-Molecular-Weight Polyethylene Versus Highly Cross-Linked Polyethylene in Total Ankle Arthroplasty

2018 ◽  
Vol 39 (11) ◽  
pp. 1335-1344 ◽  
Author(s):  
Oliver N. Schipper ◽  
Steven L. Haddad ◽  
Spencer Fullam ◽  
Robin Pourzal ◽  
Markus A. Wimmer
Keyword(s):  
Particle Size ◽  
Wear Rate ◽  
Particle Shape ◽  
Polyethylene Wear ◽  
Ultrahigh Molecular Weight Polyethylene ◽  
Total Ankle Arthroplasty ◽  
Fixed Bearing ◽  
Ankle Arthroplasty ◽  
Ultrahigh Molecular Weight ◽  
The Mean

Background: The aim of this study was to compare the polyethylene wear rate, particle size, and particle shape of primary semiconstrained, fixed-bearing, bone-sparing total ankle arthroplasty using conventional ultrahigh-molecular-weight polyethylene (CPE) versus highly cross-linked polyethylene (HXLPE) by applying a level walking input using a joint simulator. Methods: Two fixed-bearing total ankle replacement systems with different types of polyethylene liners were tested: (1) CPE sterilized in ethylene oxide, and (2) HXLPE sterilized with gas plasma after electron beam irradiation. Three implants for each design underwent wear testing using gravimetric analysis over 5 million simulated walking cycles. A fourth implant was used as a load soak control. Equivalent circle diameter (ECD) and equivalent shape ratio (ESR) were computed to determine particle size and particle shape, respectively. Results: The mean wear rate from 1.5 to 5 million cycles (MC) was 2.0 ± 0.3 mg/MC for HXLPE and 16.7 ± 1.3 mg/MC for CPE ( P < .001). The total number of particles per cycle generated for HXLPE and CPE were 0.17 × 106 particles/cycle and 0.53 × 106 particles/cycle, respectively ( P < .001). The mean ECD of HXLPE particles (0.22 ± 0.11 μm) was significantly smaller than the mean ECD of CPE particles (0.32 ± 0.14 μm) ( P < .001). HXLPE particles were significantly more round than CPE particles ( P < .001). Conclusions: HXLPE liners had a significantly lower wear rate and produced significantly fewer and rounder particles than CPE liners. The results of this study suggest that HXLPE has more favorable wear characteristics for total ankle arthroplasty. Clinical Relevance: Polyethylene wear particles have been linked to osteolysis after total ankle arthroplasty. There is no consensus on the importance of highly cross-linked polyethylene in total ankle arthroplasty with regard to implant wear. This is the first nonindustry study to compare the polyethylene wear rate, particle size, and particle shape of fixed-bearing total ankle arthroplasty conventional polyethylene versus highly cross-linked polyethylene. The lower wear rate and different particle size/morphology of highly cross-linked polyethylene could be beneficial in vivo to decrease osteolysis.

On the true wear rate of ultrahigh molecular weight polyethylene in the total knee prosthesis

1984 ◽  
Vol 18 (2) ◽  
pp. 207-224 ◽  
Author(s):  
Robert M. Rose ◽  
Michael D. Ries ◽  
Igor L. Paul ◽  
Aldo M. Crugnola ◽  
Edward Ellis
Keyword(s):  
Molecular Weight ◽  
Wear Rate ◽  
Knee Prosthesis ◽  
Ultrahigh Molecular Weight Polyethylene ◽  
Total Knee Prosthesis ◽  
Ultrahigh Molecular Weight ◽  
Total Knee

Tribological behavior of an ultrahigh molecular weight polyethylene in lubricated environments

e-Polymers ◽  
2011 ◽  
Vol 11 (1) ◽  
Author(s):  
O. K. Kahyaoglu ◽  
H Unal ◽  
A Mimaroglu ◽  
S.H. Yetgin
Keyword(s):  
Molecular Weight ◽  
Wear Rate ◽  
Coefficient Of Friction ◽  
Salt Solution ◽  
Ultrahigh Molecular Weight Polyethylene ◽  
Specific Wear Rate ◽  
Distilled Water ◽  
Aisi 304L ◽  
Ultrahigh Molecular Weight ◽  
The Coefficient Of Friction

AbstractThe wear and friction performance of GUR 1020 grade ultrahigh molecular weight polyethylene (UHMWPE) polymer was studied in distilled water, HASS (Hank’s balanced salt solution) and several protein lubrication environments. Wear tests were carried out using polymer pin -on AISI 304L stainless steel disc apparatus. Tests conditions were room temperature, 40N, 80N and 120N applied loads and 0.5 m/s sliding speed. For the range of load and speed value of this work, the coefficient of friction and wear rate for UHMWPE polymer decreases with the increase in applied load values. The coefficient of friction is highest and the specific wear rate values is lowest under HASS +HA solution lubricant. The average specific wear rate values for UHMWPE polymer under distilled water and HASS+HA (Hank’s balanced salt solution with Hyaluronic acid) lubrication conditions are in the order of 9x10-15 m2/N and 3x10-15 m2/N respectively. The wear mechanism includes abrasion and adhesive processes.

Isolation, characterization and quantification of polyethylene wear debris from periprosthetic tissues around total joint replacements

Wear ◽  
2007 ◽  
Vol 262 (9-10) ◽  
pp. 1171-1181 ◽  
Author(s):  
Miroslav Slouf ◽  
Simona Eklova ◽  
Jitka Kumstatova ◽  
Stephane Berger ◽  
Hana Synkova ◽  
...  
Keyword(s):  
Wear Debris ◽  
Polyethylene Wear ◽  
Joint Replacements ◽  
Total Joint Replacements

New aspects in the histological examination of polyethylene wear particles in failed total joint replacements

2002 ◽  
Vol 104 (3) ◽  
pp. 263-269 ◽  
Author(s):  
Torsten Hansen ◽  
Mike Otto ◽  
Gottfried H. Buchhorn ◽  
Dieter Scharnweber ◽  
Andreas Gaumann ◽  
...  
Keyword(s):  
Histological Examination ◽  
Polyethylene Wear ◽  
Wear Particles ◽  
Joint Replacements ◽  
Total Joint Replacements
Sign in / Sign up

Export Citation Format

Share Document