Effect of Water and Serum Absorption on Wear of Unirradiated and Crosslinked UHMWPE Orthopedic Bearing Materials

Laraia, Kathryn; Leone, Nicholas; MacDonald, Rebecca A.; Blanchet, Thierry A.

doi:10.1080/05698190600678663

Cited by 11 publications

(6 citation statements)

References 6 publications

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“…A 6–16% decrease in osteoblast survivability for UHMWPE-0.1GNP could also be attributed to the absorption of cell culture medium in the composite film, followed by traces of GNP leaching into the medium that causes necrosis of osteoblasts. Other researchers have also reported absorption of water and bovine serum on UHMWPE surface deteriorating its wear resistance . Because most of the GNPs in UHMWPE-0.1GNP film are wrapped with polymer (Figure b), only traces of unwrapped GNPs may be available for leaching.…”

Section: Resultsmentioning

confidence: 95%

“…Other researchers have also reported absorption of water and bovine serum on UHMWPE surface deteriorating its wear resistance. 38 Because most of the GNPs in UHMWPE-0.1GNP film are wrapped with polymer (Figure 4b), only traces of unwrapped GNPs may be available for leaching. It is expected that most of the unwrapped GNPs will go into the solution during an initial exposure period.…”

Section: Strengthening Mechanism Figurementioning

confidence: 99%

See 1 more Smart Citation

Graphene Nanoplatelet-Induced Strengthening of UltraHigh Molecular Weight Polyethylene and Biocompatibility In vitro

Lahiri

Dua

Zhang

et al. 2012

ACS Appl. Mater. Interfaces

151

117

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Graphene nanoplatelets (GNPs) are added as reinforcement to ultrahigh molecular weight polyethylene (UHMWPE) with an intended application for orthopedic implants. Electrostatic spraying is established as a potential fabrication method for synthesizing large-scale UHMWPE-GNP composite films. At a low concentration of 0.1 wt % GNP, the composite film shows highest improvement in fracture toughness (54%) and tensile strength (71%) as compared to UHMWPE. Increased GNP content of 1 wt % leads to improvement in elastic modulus and yield strength but fracture toughness and tensile strength are reduced significantly at higher GNP content. The strengthening mechanisms of the UHMWPE-GNP system are highly influenced by the GNP concentration, which dictates its degree of dispersion and extent of polymer wrapping. The fraction of GNPs oriented along the tensile axis influences the elastic deformation, whereas the wrapping of polymer and GNP-polymer interfacial strength determines the deformation behavior in the plastic regime. The cytotoxicity of GNP to osteoblast is dependent on its concentration and is also influenced by agglomeration of particles. Lowering the concentration of GNPs in UHMWPE improves the biocompatibility of the composite surface to bone cells. The survivability of osteoblasts deteriorates up to 86% on 1 wt % GNP containing surface, whereas much smaller (6-16%) reduction is observed for 0.1 wt % GNP over 5 days of incubation.

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Section: Resultsmentioning

confidence: 95%

Section: Strengthening Mechanism Figurementioning

confidence: 99%

Graphene Nanoplatelet-Induced Strengthening of UltraHigh Molecular Weight Polyethylene and Biocompatibility In vitro

Lahiri

Dua

Zhang

et al. 2012

ACS Appl. Mater. Interfaces

151

117

View full text Add to dashboard Cite

show abstract

“…The significant increase of COF for Ringer's solution with bone cement particles was expected. Effects of water absorption under pressure have been demonstrated to increase wear, due to the mass increase of UHMWPE 24,25 . Also, wet environment has influence on the crystallinity and the bonds between the UHMWPE molecular chains.…”

Section: Resultsmentioning

confidence: 99%

“…Also, wet environment has influence on the crystallinity and the bonds between the UHMWPE molecular chains. Furthermore, water absorption varies depending on the contact pressures during the contact and the number of sliding cycles, thus promoting transitional wear behaviour 25 . Slight oscillations of COF values are noticeable in Figure 3.…”

Section: Resultsmentioning

confidence: 99%

Influence of different environments on the sliding friction of Ultra-high-molecular-weight polyethylene (UHMWPE)

Živić

Adamović

Mitrović

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part J:

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Dynamic friction coefficient (COF) of the reciprocating sliding contact of the conventional UHMWPE, was investigated in four different environments (dry contact; distilled water; pure Ringer's solution and with PMMA particles), at five values of low normal load (0.1–1 N) and three values of sliding speed (4 - 12 mm/s). Significant differences of COF values occurred at the lowest load (0.1 N), whereas sliding speed did not influence COF values. Addition of PMMA particles in Ringer's solution produced significant increase of COF values, especially at the lowest load of 0.1 N. For the dry contact and the highest load (1 N), steady state was reached shortly after the beginning of the test and friction coefficient had uniform behaviour. In the case of wet environment and the lowest load, steady state was not reached and the friction coefficient exhibited non-reproducible random behaviour. According to the Hertz theory, 0.5 N load corresponded to the elastic stress of 48.7 MPa, thus surpassing the values of the elastic limits, hardness and true yield stress of the UHMWPE, and the behaviour of the friction coefficient was drastically different below and above this load value. It can be assumed that below the 0.5 N load, viscoelastic response, accompanied with plastic deformation is dominant, with transition to mainly plastic deformation for the higher loads.

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“…At present, ultra high-molecular weight polyethylene (UHMWPE) is the widely used acetabular material of artificial joint because of its high wear resistance and biocompatibility. [1][2][3][4] But over time, the accumulation of wear debris leads to osteolysis, which further leads to bone loss and ultimately limits the life of the artificial joint. [5][6][7][8][9][10][11][12] So, on one hand, the search for alternate materials has been focused on metal-on-metal or ceramic-on-ceramic bearing couples.…”

Section: Introductionmentioning

confidence: 99%

Effect of micro-surface defect on tribological property of UHMWPE

Liu

Cao

2011

Journal of Reinforced Plastics and Composites

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The article studied the friction and wear properties of UHMWPE when the surface was probed with micro-defect. The results indicated that the friction coefficient decreased when the micro-defect holes were gradually distributed on the friction surface uniformly. That was mainly because the uniform micro-defect holes formed regular texture, increasing the balance of friction and wear. The wear loss of UHMWPE decreased gradually with the increase of the amount of micro-defect holes, and there was a good linear relationship between them. When the friction surface was filled with uniformly distributed micro-defect holes, not only the wear loss decreased, but also wear debris with ideal size distribution was obtained. So, the theoretical and experimental basis was provided for the idea of the surface texturization of artificial arthrosis.

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Effect of Water and Serum Absorption on Wear of Unirradiated and Crosslinked UHMWPE Orthopedic Bearing Materials

Cited by 11 publications

References 6 publications

Graphene Nanoplatelet-Induced Strengthening of UltraHigh Molecular Weight Polyethylene and Biocompatibility In vitro

Graphene Nanoplatelet-Induced Strengthening of UltraHigh Molecular Weight Polyethylene and Biocompatibility In vitro

Influence of different environments on the sliding friction of Ultra-high-molecular-weight polyethylene (UHMWPE)

Effect of micro-surface defect on tribological property of UHMWPE

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