Wear mechanisms of UHMWPE in total joint replacements

Wang, A.; Sun, D. C.; Stark, C.; Dumbleton, J. H.

doi:10.1016/0043-1648(95)90030-6

Cited by 106 publications

(52 citation statements)

References 22 publications

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“…Some laboratories use undiluted bovine serum while others use dilute the bovine serum by adding deionized water. Wear rate of conventional polyethylene has been shown to increase with dilution of bovine serum [28]. However, at extreme dilutions, non-physiological wear mechanisms have been shown to dominate the wear process [29].…”

Section: Discussionmentioning

confidence: 99%

Wear Resistance and Mechanical Properties of Highly Cross-linked, Ultrahigh–Molecular Weight Polyethylene Doped With Vitamin E

Oral

Christensen

Malhi

et al. 2006

The Journal of Arthroplasty

274

207

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Our hypothesis was that cross-linked UHMWPE stabilized with vitamin-E would be wear and fatigue resistant. Acetabular liners were radiation cross-linked, doped with vitamin E and γ-sterilized. Hip simulator wear rate of vitamin E-stabilized UHMWPE was approximately 1 and 6 mg/million-cycles in clean serum and in serum with third-body bone cement particles, respectively; a four to ten-fold decrease from that of conventional UHMWPE. The ultimate strength, yield strength, elongation-atbreak and fatigue resistance of vitamin E-stabilized UHMWPE were significantly higher than that of 100-kGy irradiated and melted UHMWPE and were unaffected by accelerated aging. Rim impingement testing with 3.7 mm-thick acetabular liners up to 2 million-cycles showed no significant damage of the cross-linked liners compared to conventional, gamma-sterilized in inert UHMWPE vitamin-E stabilized liners. The data indicate good wear properties and improved mechanical and fatigue properties for vitamin-E stabilized cross-linked UHMWPE.

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Section: Discussionmentioning

confidence: 99%

Wear Resistance and Mechanical Properties of Highly Cross-linked, Ultrahigh–Molecular Weight Polyethylene Doped With Vitamin E

Oral

Christensen

Malhi

et al. 2006

The Journal of Arthroplasty

274

207

View full text Add to dashboard Cite

show abstract

“…As far as the correlation between scratching of femoral heads and the wear of UHMWPE components is concerned, discrepancies have been observed between the quantitative results of different laboratory wear tests and clinical observations [2,3,[6][7][8][9]. These discrepancies have mainly been attributed to the fact that, in clinical situations, localized head scratching may occur and generate damaged regions whose sites, size and severity magnitude are seemingly randomly distributed [2,3,7,10].…”

Section: Introductionmentioning

confidence: 91%

“…Despite the growing success of this type of surgery, limiting the wear of UHMWPE components remains a key issue to improve the long-term performance of these Charnley type prostheses. While the influence of variations in component design, in surgical technique and/or in patient activity level cannot be ignored, the scratching of the metallic femoral head is currently thought to be a major factor affecting the wear rate of the UHMWPE counterface [1][2][3][4][5][6][7][8][9][10]. This scratching phenomenon is increasingly suspected to be caused by hard third bodies such as particles of bone, cement and/or metal, which have often been found embedded in acetabular cups and in the peri-prosthetic tissues [1][2][3][4][5]11,12].…”

Section: Introductionmentioning

confidence: 99%

About the relevance of roughness parameters used for characterizing worn femoral heads

Najjar¹,

Bigerelle²,

Migaud³

et al. 2006

Tribology International

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is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. AbstractThis study aims to contribute to the definition of a methodology, which can help to select a relevant roughness parameter with a view to describing the topography of orthopaedic bearing surfaces. In this investigation, the surface topography of a retrieved titanium alloy (TA6V) femoral head was characterized using visual inspection, optical microscopy and three-dimensional contacting profilometry. A numerical analysis of roughness measurements was then undertaken to assess in a first step the values of different roughness parameters of interest found in papers dealing with the topography of orthopaedic bearing surfaces. In a second step, the Analysis of Variance (ANOVA) and the Computer-Based Bootstrap Method were combined to determine statistically, and without preconceived opinion, which of those parameters is the most relevant to describe the different investigated worn regions of the studied femoral head.

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“…At the same time, obvious traces of wearing through fretting of the acetabular cup of UHMWPE. In some studies this traces are confounded or assimilated with the adhesive wear [5][6]. Starting with the well-known fact that the rolling movement always has a lower friction compared to sliding friction, the authors have conceived and realized a pivoting movement joint on a "layer of balls" with "compensation space", placed between the acetabular cup and the femoral head.…”

Section: Mom Hip Prosthesis With Self Directed Rolling Ballsmentioning

confidence: 99%

New Concepts for Improved Durability of MOM Total Hip Endoprostheses. A Review

Capitanu¹,

Florescu²

2013

MATERIALS

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Analyzing some hip prostheses retrieved by revision, the appearance of some forms of polishing of the femoral head were observed, as well as significant plastic deformations followed by local hardening. At the same time, obvious traces of wearing through fretting of the acetabular cup of UHMWPE, which in some studies are confounded or assimilated with the adhesive wear. Starting with the well-known fact that the rolling movement always has a lower friction compared to sliding friction, the authors have conceived and realized a pivoting movement joint on a "layer of balls" with "compensation space", placed between the acetabular cup and the femoral head. This technical MOM solution allows free self-directed migration of the balls, depending on the resistance opposed, with successive occupation of the "compensation space". As a concept, the proposed technical solution excludes the existence of a cage for maintaining the spheres relative positions.

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Wear mechanisms of UHMWPE in total joint replacements

Cited by 106 publications

References 22 publications

Wear Resistance and Mechanical Properties of Highly Cross-linked, Ultrahigh–Molecular Weight Polyethylene Doped With Vitamin E

Wear Resistance and Mechanical Properties of Highly Cross-linked, Ultrahigh–Molecular Weight Polyethylene Doped With Vitamin E

About the relevance of roughness parameters used for characterizing worn femoral heads

New Concepts for Improved Durability of MOM Total Hip Endoprostheses. A Review

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