A patterned microtexture to reduce friction and increase longevity of prosthetic hip joints

Chyr, Anthony; Qiu, Mingfeng; Speltz, Jared W.; Jacobsen, Ronald L.; Sanders, Anthony P.; Raeymaekers, Bart

doi:10.1016/j.wear.2014.04.001

Cited by 80 publications

(45 citation statements)

References 37 publications

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“…One common outcome is that the micro-texture increases the loading-carrying capacity and the thickness of the joint lubricant film, resulting in a reduction in friction and wear [110,[112][113][114][115]. Load effects were studied in [107,113] when dimple diameter was around 40-50 μm.…”

Section: Laser Surface Texturingmentioning

confidence: 99%

Wear Performance of UHMWPE and Reinforced UHMWPE Composites in Arthroplasty Applications: A Review

2015

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Abstract:As the gold standard material for artificial joints, ultra-high-molecular-weight polyethylene (UHMWPE) generates wear debris when the material is used in arthroplasty applications. Due to the adverse reactions of UHMWPE wear debris with surrounding tissues, the life time of UHMWPE joints is often limited to 15-20 years. To improve the wear resistance and performance of the material, various attempts have been made in the past decades. This paper reviews existing improvements made to enhance its mechanical properties and wear resistance. They include using gamma irradiation to promote the cross-linked structure and to improve the wear resistance, blending vitamin E to protect the UHMWPE, filler incorporation to improve the mechanical and wear performance, and surface texturing to improve the lubrication condition and to reduce wear. Limitations of existing work and future studies are also identified.

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Section: Laser Surface Texturingmentioning

confidence: 99%

Wear Performance of UHMWPE and Reinforced UHMWPE Composites in Arthroplasty Applications: A Review

2015

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“…Fabricated by laser surface texturing technique, Cho and Choi [9] reported that the friction of the textured surface decreases regardless of the texture density and the aspect ratio and the optimum texture density and the depth for all the sliding conditions studied were found to be 25% and 25 μm, respectively. Further, the benefit of micro-textured patterns applied on the artificial hip/knee joint components was reported by Chyr et al [10].…”

Section: Introductionmentioning

confidence: 80%

New Star-Like Surfacetexture for Enhanced Hydrodynamic Lubrication Performance

Uddin

Liu

Shankar³

2017

Archives of Metallurgy and Materials

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This paper presents a numerical modelling and optimization of a new 'star-like' geometric texture shape with an aim to improve tribological performance. Initial studies showed that the triangle effect is the most dominant in reducing the friction. Motivated with this, a 'star-like' texture shape consisting of a series of triangular spikes around the centre of the texture is proposed. It is hypothesised that by increasing the triangular effect on a texture shape, the converging micro-wedge effect is expected to increase, hence increasing the film pressure and reducing the friction. Using the well-known Reynolds boundary conditions, numerical modelling of surface texturing is implemented via finite difference method. Simulation results showed that the number of apex points of the new 'star-like' texture has a significant effect on the film pressure and the friction coefficient. A 6-pointed texture at a texture density of 0.4 is shown to be the optimum shape. The new optimum star-like texture reduces the friction coefficient by 80%, 64.39%, 19.32% and 16.14%, as compared to ellipse, chevron, triangle and circle, respectively. This indicates the potential benefit of the proposed new shape in further enhancing the hydrodynamic lubrication performance of slider bearing contacts.

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“…In Ref. [26], lubrication model of the hip implant was developed aiming on the development of an optimal design of microtextures. It was found that the textures increase load-carrying capacity and the film thickness, together with lowering the contact pressure.…”

Section: Introductionmentioning

confidence: 99%

Running-in friction of hip joint replacements can be significantly reduced: The effect of surface-textured acetabular cup

et al. 2020

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Hip joint replacements represent the most effective way of treatment for patients suffering from joint diseases. Despite the rapid improvement of implant materials over the last few decades, limited longevity associated with wear-related complications persists as the main drawback. Therefore, improved tribological performance is required in order to extend the service life of replacements. The effect of surface texturing of ultrahigh molecular weight polyethylene (UHMWPE) acetabular cup was investigated in the present study. Unique tilling method was utilized for manufacturing the dimples with controlled diameter and depths on the contact surface of the cup. The experiments with four commercial femoral components and two model lubricants were realized. The main attention was paid to a coefficient of friction considering the differences between the original and the dimpled cups. Results showed remarkable lowering of friction, in general. Focusing on the simulated human synovial fluid, friction was reduced by 40% (alumina ceramic), 38.8% (zirconia toughened ceramic), 25.5% (metal), and 9.9% (oxinium). In addition, the dimples helped to keep the friction stable without fluctuations. To conclude, the paper brings a new insight into frictional behaviour of the hip replacements during running-in phase which is essential for overall implant lifespan. It is believed that proper surface texturing may rapidly improve the life quality of millions of patients and may lead to considerable financial savings.

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A patterned microtexture to reduce friction and increase longevity of prosthetic hip joints

Cited by 80 publications

References 37 publications

Wear Performance of UHMWPE and Reinforced UHMWPE Composites in Arthroplasty Applications: A Review

Wear Performance of UHMWPE and Reinforced UHMWPE Composites in Arthroplasty Applications: A Review

New Star-Like Surfacetexture for Enhanced Hydrodynamic Lubrication Performance

Running-in friction of hip joint replacements can be significantly reduced: The effect of surface-textured acetabular cup

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