The Effects of Thickness and Fixation of Ultrahigh-Molecular-Weight Polyethylene and of Traction on Wear Behavior in Artificial Knee Joint.

Fujiki, Hiroyuki; Ishikawa, Hiromasa; Yasuda, Kazunori

doi:10.1299/kikaia.60.1871

Cited by 4 publications

(3 citation statements)

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“…1 The destruction is likely due to the fatigue of ultrahigh molecular weight polyethylene (UHMWPE), 2,3,4 which can be accelerated by oxidation and other factors such as material processing. 4,5 However, experiments for the delamination wear have been disturbed by the fact that this destruction is hard to reproduce consistently in wear tests, 1 and that UHMWPE is hard to cut precisely.…”

Section: Introductionmentioning

confidence: 99%

“…12 A similar depth was found at which fatigue likely occurred by analysis using a constitutive equation for cyclic plasticity. 2,3 It is likely that oxidation caused by gamma irradiation accelerates the fatigue process of UHMWPE. 13,14,15 Correspondence to: N. Tomita, Institute for Frontier Medical Sciences, Kyoto University, 53 Kawahara-cho Shogoin Sakyo-ku, Kyoto 606, Japan (e-mail: ntomita@frontier.kyoto-u.ac.jp) Bell et al reported that the cracks propagated through the subsurface oxidized band.…”

Section: Introductionmentioning

confidence: 99%

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Prevention of fatigue cracks in ultrahigh molecular weight polyethylene joint components by the addition of vitamin E

Tomita

Kitakura

Onmori

et al. 1999

J. Biomed. Mater. Res.

123

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Flaking-type wear, so-called delamination, is often observed in polyethylene joint components. This is thought to occur partly due to crack formation and propagation at grain boundaries. This study examined the effect of vitamin E on the crack formation and/or propagation in UHMWPE by using 2-dimensional sliding fatigue testing and micro indenter testing. An in vitro sliding fatigue test was performed under two simplified articulating movements, and the cracks produced were observed by scanning acoustic tomography (SAT). Gamma-irradiated ultrahigh molecular weight polyethylene (UHMWPE) specimens demonstrated a smaller area of accumulated cracks as compared to virgin specimens, when the loading movement was reciprocated on a single linear locus. However, four out of five gamma-irradiated UHMWPE specimens exhibited severe flaking-like destruction under the complicated sliding condition, suggesting that gamma irradiation accelerated crack propagation under multidirectional loading. All the gamma-irradiated vitamin-E-containing specimens demonstrated no subsurface crack formation and no flaking-like destruction. Results using micro indenter testing showed that the dynamic hardness at grain boundary was higher than that in grain, and was increased by gamma irradiation. This hardening at grain boundary was reduced by adding vitamin E. It is possible that the presence of vitamin E prevents crack propagation partly due to reduced hardness at grain boundaries. The gamma-irradiated vitamin-E-containing UHMWPE is a promising material to prevent flaking-like destruction of polyethylene joint components.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Prevention of fatigue cracks in ultrahigh molecular weight polyethylene joint components by the addition of vitamin E

Tomita

Kitakura

Onmori

et al. 1999

J. Biomed. Mater. Res.

123

View full text Add to dashboard Cite

show abstract

“…[1][2][3][4] The delamination, a kind of fatigue damage, 2,[5][6][7] starts with subsurface cracking 8,9 or crazing, causing complete failure of the UHMWPE components. However, the mechanism of the fatigue process has not been elucidated because of the complicated effect of several mechanical and other factors.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulations on fatigue destruction of ultra‐high molecular weight polyethylene using discrete element analyses

Shibata

Tomita

Ikeuchi

2003

J Biomedical Materials Res

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Ultra-high molecular weight polyethylene (UHMWPE) is a heterogeneous material composed of a networked substructure of grain boundary and grain aggregation. A new numerical model based on the discrete element method (DEM) was proposed to examine microscopic defect formation and propagation in UHMWPE. Numerical simulations were carried out using this model under two types of loading condition: unidirectional repetitive compression (simple loading) and bidirectional repetitive compression (switched loading). Subsurface defects were initiated and propagated in the vicinity of grain boundaries under both loading conditions. The defect propagation behavior was especially sensitive to grain boundary allocation under switched loading. An increase in defects was more rapid under switched loading than under simple loading. These numerical results showed qualitatively good agreement with experimental ones. It is suggested that the newly developed numerical method based on the DEM is a promising method to investigate fatigue behavior of a heterogeneous material such as UHMWPE under complicated loading conditions.

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Finite-element analysis and simulation of polymers: a bibliography (1976 - 1996)

Mackerle¹

1997

Modelling Simul. Mater. Sci. Eng.

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This paper gives a bibliographical review of the finite-element methods applied to the analysis and simulation of polymers. The bibliography at the end of the paper contains references to papers, conference proceedings and theses/dissertations on the subject that were published between 1976 - 1996. The following topics are included: polymer flow and mixing simulation; polymer processing; thermal analysis of polymers; fracture mechanics of polymers; modelling polymer behaviours and their mechanical properties; practical polymer applications in engineering; other topics.

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The Effects of Thickness and Fixation of Ultrahigh-Molecular-Weight Polyethylene and of Traction on Wear Behavior in Artificial Knee Joint.

Cited by 4 publications

References 0 publications

Prevention of fatigue cracks in ultrahigh molecular weight polyethylene joint components by the addition of vitamin E

Prevention of fatigue cracks in ultrahigh molecular weight polyethylene joint components by the addition of vitamin E

Numerical simulations on fatigue destruction of ultra‐high molecular weight polyethylene using discrete element analyses

Finite-element analysis and simulation of polymers: a bibliography (1976 - 1996)

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