Low Wear Rates Found with Second-Generation Highly Cross-Linked Polyethylene

Titanium alloys are well known to present poor sliding behaviour and high wear values. Various coatings and treatments have been tested to prevent such an occurrence under fretting conditions at high frequency of displacement (100 Hz). An original test apparatus, using an open-loop system instead of a classical imposed displacement simulator, has been performed to directly display the phenomenon of seizure, defined as the stopping of the relative motion between the contacting elements. A classification of the tested coatings has been proposed on the basis of their capacity to maintain full or partial sliding conditions, to present low wear rates and to prevent seizure.

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A Tracer Method to Determine Extremely Low Wear Rates of Ultrahigh Molecular Weight Polyethylene

Journal of ASTM International ◽

10.1520/jai100253 ◽

2006 ◽

Vol 3 (9) ◽

pp. 100253 ◽

Cited By ~ 4

Author(s):

J Kunze ◽

MA Wimmer

Keyword(s):

Molecular Weight ◽

Ultrahigh Molecular Weight Polyethylene ◽

Tracer Method ◽

Wear Rates ◽

Ultrahigh Molecular Weight ◽

Low Wear

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Low Wear of a Second-generation Highly Crosslinked Polyethylene Liner: A 5-year Radiostereometric Analysis Study

Clinical Orthopaedics and Related Research ◽

10.1007/s11999-013-3188-z ◽

2013 ◽

Vol 471 (11) ◽

pp. 3596-3600 ◽

Cited By ~ 34

Author(s):

Stuart A. Callary ◽

John R. Field ◽

David G. Campbell

Keyword(s):

Second Generation ◽

Polyethylene Liner ◽

Radiostereometric Analysis ◽

Analysis Study ◽

Low Wear

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Load Scenarios Influence Fluid Absorption of Polyethylene

World Tribology Congress III, Volume 2 ◽

10.1115/wtc2005-63578 ◽

2005 ◽

Author(s):

T. Schwenke ◽

C. Rieker ◽

M. A. Wimmer

Keyword(s):

Wear Testing ◽

Fluid Absorption ◽

Joint Replacements ◽

Wear Rates ◽

Total Joint Replacements ◽

Fluid Uptake ◽

Dynamically Loaded ◽

Low Wear ◽

Lubrication Conditions

Wear of total joint replacements is determined gravimetrically in simulator studies. A mix of bovine serum, distilled water, and additives is intended to replicate the lubrication conditions in-vivo. Weight gain due to fluid absorption during testing of UHMWPE components is corrected using a load soak station. In this study six sets of UHMWPE pins were tested for their fluid soak behavior. The samples were subjected to three different loading scenarios while being submersed in two types of commonly used lubricants. After two million cycles or 23.1 days, respectively, the different fluids lead to significantly different soaking results. Test groups that were dynamically loaded gained more weight than unloaded or statically loaded samples. The results suggest that dynamically loaded soak control stations are required during wear testing of UHMWPE components. Otherwise the fluid uptake masks the wear measurement, especially for new polyethylene materials with low wear rates. Furthermore, an agreement on detailed lubricant specifications is desirable.

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Mid- to Long-Term Survivorship Analysis of a Second-Generation Highly Cross-Linked Polyethylene in Total Hip Arthroplasty

The Journal of Hip Surgery ◽

10.1055/s-0040-1714292 ◽

2020 ◽

Vol 4 (03) ◽

pp. 124-128

Author(s):

David Yeroushalmi ◽

Katherine A. Lygrisse ◽

Mohamad Sharan ◽

Nolan A. Maher ◽

Joseph D. Zuckerman ◽

...

Keyword(s):

Total Hip Arthroplasty ◽

Wear Rate ◽

Hip Arthroplasty ◽

Second Generation ◽

Abduction Angle ◽

Linear Wear ◽

Wear Rates ◽

Total Hip

AbstractThe emergence of highly cross-linked polyethylene (HCLPE) has drastically improved survivorship of implants used in total hip arthroplasty (THA), as demonstrated by midterm outcomes. However, there is limited data evaluating long-term outcomes and wear rates of these liners. Therefore, the aim of this study is to evaluate the longest-to-date follow-up of a specific second-generation HCLPE liner, the progression of wear rate, and its relation to acetabular cup positioning. A retrospective study was conducted on patients who underwent THA between January 2001 and December 2005 using a specific second-generation HCLPE liner. Annual liner wear rate (mm/year) was calculated in this group as well as acetabular positioning through abduction angle (degrees). Failures and reason for failures such as periprosthetic fracture, dislocation, and osteolysis were noted when applicable. Forty hips of 35 patients were included in this study with a clinical and radiographic follow-up of 13.4 ± 2.2 years (range: 10.0–16.7 years). Linear and volumetric wear rates were calculated to be 0.037 ± 0.020 mm/year and 22.94 ± 12.07 mm3/year, respectively. No radiographic femoral or acetabular osteolysis was observed in any of the cases. One patient required revision due to complications unrelated to the liner. No significant relationship could be established for acetabular component abduction angle and linear wear rate (p = 0.690, Spearman's rho = 0.03). Our study demonstrates comparable liner wear rates to that of other second-generation HCLPE liners in long-term follow-up. The XLPE liner continues to exhibit minimal progression of linear wear when compared with previous midterm studies and maintains a low rate of postoperative complications requiring revision THA surgery. Further studies are warranted to assess long-term wear and survivorship between this specific liner and comparable HCLPE models.

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Advanced wear of an Oxinium™ femoral head implant following polyethylene liner dislocation

Annals of The Royal College of Surgeons of England ◽

10.1308/rcsann.2013.95.8.e4 ◽

2013 ◽

Vol 95 (8) ◽

pp. e4-e6 ◽

Cited By ~ 2

Author(s):

H Tribe ◽

S Malek ◽

J Stammers ◽

V Ranawat ◽

JA Skinner

Keyword(s):

Femoral Head ◽

Surface Coating ◽

Hip Dislocation ◽

Acetabular Cup ◽

Revision Procedure ◽

Wear Rates ◽

Soft Metal ◽

Low Wear

Oxinium™ (Smith & Nephew, Memphis, TN, US) has been used in hip arthroplasty since 2003. The surface coating is hard and provides low wear rates but if this surface coating is damaged, the soft metal core is at risk of accelerated wear. Previous reports have described accelerated wear following intra and postoperative hip dislocation. We report a case of advanced wear of an in situ Oxinium™ femoral head implant following a cracked acetabular liner. The liner had disengaged from the titanium shell, allowing the Oxinium™ head to articulate directly with the shell. The disengaged liner led to dislocation of the Oxinium™ head, with associated pronounced wear of the head and the acetabular cup. The patient had a successful revision procedure. We advise close follow-up of patients with Oxinium™ implants, especially if associated with dislocation and closed reduction.

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

Tribology Letters ◽

10.1007/s11249-009-9486-7 ◽

2009 ◽

Vol 37 (1) ◽

pp. 23-29 ◽

Cited By ~ 11

Author(s):

J. P. Kretzer ◽

M. Krachler ◽

J. Reinders ◽

E. Jakubowitz ◽

M. Thomsen ◽

...

Keyword(s):

Hip Joint ◽

Trace Element Analysis ◽

Element Analysis ◽

Joint Replacements ◽

Wear Rates ◽

Metal On Metal ◽

Low Wear ◽

Ultra Trace ◽

Hip Joint Replacements

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Tribological assessment of a flexible carbon-fibre-reinforced poly(ether—ether—ketone) acetabular cup articulating against an alumina femoral head

Proceedings of the Institution of Mechanical Engineers Part H Journal of Engineering in Medicine ◽

10.1243/09544119jeim334 ◽

2008 ◽

Vol 222 (3) ◽

pp. 273-283 ◽

Cited By ~ 49

Author(s):

S C Scholes ◽

I A Inman ◽

A Unsworth ◽

E Jones

Keyword(s):

Wear Rate ◽

Carbon Fibre ◽

Acetabular Component ◽

Volumetric Wear ◽

Wear Rates ◽

Lubrication Regime ◽

Ether Ether Ketone ◽

Poly Ether Ether Ketone ◽

Ether Ketone ◽

Low Wear

New material combinations have been introduced as the bearing surfaces of hip prostheses in an attempt to prolong their life by overcoming the problems of failure due to wear-particle-induced osteolysis. This will hopefully reduce the need for revision surgery. The study detailed here used a hip simulator to assess the volumetric wear rates of large-diameter carbon-fibre-reinforced pitch-based poly(ether—ether—ketone) (CFR-PEEK) acetabular cups articulating against alumina femoral heads. The joints were tested for 25×106 cycles. Friction tests were also performed on these joints to determine the lubrication regime under which they operate. The average volumetric wear rate of the CFR-PEEK acetabular component of 54 mm diameter was 1.16 mm3/106 cycles, compared with 38.6 mm3/106 cycles for an ultra-high-molecular-weight polyethylene acetabular component of 28 mm diameter worn against a ceramic head. This extremely low wear rate was sustained over 25×106 cycles (the equivalent of up to approximately 25 years in vivo). The frictional studies showed that the joints worked under the mixed—boundary lubrication regime. The low wear produced by these joints showed that this novel joint couple offers low wear rates and therefore may be an alternative material choice for the reduction of osteolysis.

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