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Journal ArticleDOI

Feasibility study of micro-groove cross hatched surface texturing on Ti6Al4V for improved biotribological performance in metal-on-polymer hip implant

23 Apr 2019-Tribology - Materials, Surfaces & Interfaces (Taylor & Francis)-Vol. 13, Iss: 3, pp 150-160
TL;DR: In this article, the feasibility of micro-groove cross hatched textures on Ti6Al4V articulating with Ultra High Molecular Weight Polyethylene (UHMWPE) for a Metal-on-Polymer (MoP) hi...
Abstract: This study investigates the feasibility of micro-groove cross hatched textures on Ti6Al4V articulating with Ultra High Molecular Weight Polyethylene (UHMWPE) for a Metal-on-Polymer (MoP) hi...
Citations
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Journal ArticleDOI
TL;DR: This work critically review the literature on textured orthopedic biomaterial surfaces in the context of prosthetic hip implants and discusses the different functions of texture features by highlighting experimental and simulated results documented by research groups active in this area.
Abstract: More than 300,000 total hip replacement surgeries are performed in the United States each year to treat degenerative joint diseases that cause pain and disability. The statistical survivorship of these implants declines significantly after 15-25 years of use because wear debris causes inflammation, osteolysis, and mechanical instability of the implant. This limited longevity has unacceptable consequences, such as revision surgery to replace a worn implant, or surgery postponement, which leaves the patient in pain. Innovations such as highly cross-linked polyethylene and new materials and coatings for the femoral head have reduced wear significantly, but longevity remains an imminent problem. Another method to reduce wear is to add a patterned microtexture composed of micro-sized texture features to the smooth bearing surfaces. We critically review the literature on textured orthopedic biomaterial surfaces in the context of prosthetic hip implants. We discuss the different functions of texture features by highlighting experimental and simulated results documented by research groups active in this area. We also discuss and compare different manufacturing techniques to create texture features on orthopedic biomaterial surfaces and emphasize the key difficulties that must be overcome to produce textured prosthetic hip implants.

35 citations

Journal ArticleDOI
TL;DR: In this article , the authors compare laser-based additive manufacturing and subtractive methods in terms of performance and capabilities, and propose some new potential hybrid additive manufacturing options using the principles of both laserbased methods.
Abstract: Purpose The purpose of this study is, to compare laser-based additive manufacturing and subtractive methods. Laser-based manufacturing is a widely used, noncontact, advanced manufacturing technique, which can be applied to a very wide range of materials, with particular emphasis on metals. In this paper, the governing principles of both laser-based subtractive of metals (LB-SM) and laser-based powder bed fusion (LB-PBF) of metallic materials are discussed and evaluated in terms of performance and capabilities. Using the principles of both laser-based methods, some new potential hybrid additive manufacturing options are discussed. Design methodology approach Production characteristics, such as surface quality, dimensional accuracy, material range, mechanical properties and applications, are reviewed and discussed. The process parameters for both LB-PBF and LB-SM were identified, and different factors that caused defects in both processes are explored. Advantages, disadvantages and limitations are explained and analyzed to shed light on the process selection for both additive and subtractive processes. Findings The performance of subtractive and additive processes is highly related to the material properties, such as diffusivity, reflectivity, thermal conductivity as well as laser parameters. LB-PBF has more influential factors affecting the quality of produced parts and is a more complex process. Both LB-SM and LB-PBF are flexible manufacturing methods that can be applied to a wide range of materials; however, they both suffer from low energy efficiency and production rate. These may be useful when producing highly innovative parts detailed, hollow products, such as medical implants. Originality value This paper reviews the literature for both LB-PBF and LB-SM; nevertheless, the main contributions of this paper are twofold. To the best of the authors’ knowledge, this paper is one of the first to discuss the effect of the production process (both additive and subtractive) on the quality of the produced components. Also, some options for the hybrid capability of both LB-PBF and LB-SM are suggested to produce complex components with the desired macro- and microscale features.

30 citations

Journal ArticleDOI
TL;DR: In this article, femtosecond laser is used to manufacture diamond tools with different microarray cutting edges for the flexibility of tool design and the manufacture of micro-tools without obvious edge brittle in contour.
Abstract: The properties of machining tools limit the application of micro-texture for wear reduction and self-lubrication of workpiece in precision engineering. The CVD microarray diamond tools can satisfy abrasion resistance and high lifetime of the tool as well as fast and reliable manufacture of texture structures. In this paper, femtosecond laser is used to manufacture diamond tools with different microarray cutting edges for the flexibility of tool design and the manufacture of micro-tools without obvious edge brittle in contour. The process parameters that affect the cutting edge quality are evaluated. Laser ablation strategy plays an essential role in fabricating high quality of cutting edge and high material removal efficiency. The ‘outline paths and concentric arc paths filling’ ablation strategy can guarantee both the processing quality and material removal efficiency. The ablation speed and fluence directly affect the formation of microstructure and the requirements of different tool design characteristics can be met by changing the ablation speed and fluence. By controlling the parameters of laser ablation CVD diamond, the micro-tools with dual array for micro-cutting ductile and brittle workpiece are presented. In the subsequent micro-cutting experiments, the performance of diamond tools with dual scale microarray is analyzed. Compared with the existing single cutting edge micro-tools, microarray diamond tools have higher flexibility and efficiency in microtexture processing.

25 citations

Journal ArticleDOI
01 Feb 2021
TL;DR: In this article, the authors report that textured surfaces have been remarkable in improving the frictional performance of sliding contacts, particularly at instances such as boundary or mixed lubrication regimes.
Abstract: Textured surfaces have been remarkable in improving the frictional performance of sliding contacts, particularly at instances such as boundary or mixed lubrication regimes. This article reports the...

22 citations

References
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Journal ArticleDOI
TL;DR: In this paper, the influence of alloy chemistry, thermomechanical processing and surface condition on these properties is discussed and various surface modification techniques to achieve superior biocompatibility, higher wear and corrosion resistance.

4,113 citations


"Feasibility study of micro-groove c..." refers background in this paper

  • ...Metal-on-Polymer (MoP) hip implant due to its good biocompatibility and high corrosion resistance [19]....

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Journal ArticleDOI
01 Feb 2003-Wear
TL;DR: In this article, the effect of micro-dimples on the frictional properties of a silicon nitride ceramic mated with hardened steel was investigated and it was found that the porosity depended greatly on the size and density of the microdimples, whilst the dimple shape did not significantly affect the friction coefficient regardless of rounded or angular profiles.

640 citations


"Feasibility study of micro-groove c..." refers background in this paper

  • ...[26] also confirmed the friction reduction, under line contact, for the texture diameter greater than the Hertzian contact by taking texture area density 20%....

    [...]

Journal ArticleDOI
TL;DR: Data from an instrumented femoral head prosthesis implanted in apposition to natural acetabular cartilage reveal very high local and nonuniform pressures that correlate well both in magnitude and distribution with in vitro data and computer simulations of synovial joint mechanics.
Abstract: The pressures on human articular cartilage have been measured in vivo. An instrumented femoral head prosthesis that telemeters interarticular pressure at 10 discrete locations 253 times per second was implanted in apposition to natural acetabular cartilage. Data were acquired during surgery, recovery, rehabilitation, and normal activity, for longer than 1 year after surgery. Pressure magnitudes were synchronized with body-segment kinematic data and foot-floor force measurements so as to locate transduced pressure areas on the natural acetabulum and correlate movement kinematics and dynamics with local cartilage pressures. The data reveal very high local (up to 18 MPa) and nonuniform pressures, with abrupt spatial and temporal gradients, that correlate well both in magnitude and distribution with in vitro data and computer simulations of synovial joint mechanics. Peak pressures in vivo are, however, considerably higher than pressures measured in vitro under the putative forces experienced by the joint in life, particularly in normal movements where cocontraction occurs in agonist and antagonist muscles across the hip joint. Thus, extant gait-analysis studies which apply inverse Newtonian calculations to infer joint forces establish the lower limit on such forces, since such analyses include only the net muscular torques about the joint and cannot account for the contribution of the increment in joint force due to muscular cocontraction. Our data also contribute to the understanding of normal synovial joint tribology and the possible role of mechanical factors in the deterioration evident in osteoarthritis. Further, design criteria for both partial and total hip replacement prostheses and specific aspects of rehabilitation protocols following hip surgery (e.g., the extent to which crutches and canes unload the hip joint) warrant reconsideration in light of the extraordinary high pressures measured during the activities of daily living.

621 citations

Journal ArticleDOI
TL;DR: The outcome of revision for pseudotumour in metal-on-metal hip resurfacing revisions is poor and consideration should be given to early revision to limit the extent of the soft-tissue destruction.
Abstract: Inflammatory pseudotumours occasionally occur after metal-on-metal hip resurfacing and often lead to revision. Our aim was to determine the severity of this complication by assessing the outcome of revision in these circumstances and by comparing this with the outcome of other metal-on-metal hip resurfacing revisions as well as that of matched primary total hip replacements. We identified 53 hips which had undergone metal-on-metal hip resurfacing and required revision at a mean of 1.59 years (0.01 to 6.69) after operation. Of these, 16 were revised for pseudotumours, 21 for fracture and 16 for other reasons. These were matched by age, gender and diagnosis with 103 patients undergoing primary total hip replacement with the Exeter implant. At a mean follow-up of three years (0.8 to 7.2) the outcome of metal-on-metal hip resurfacing revision for pseudotumour was poor with a mean Oxford hip score of 20.9 (SD 9.3) and was significantly worse (p < 0.001) than the outcome for fracture with a mean Oxford hip score of 40.2 (SD 9.2) or that for other causes with a mean Oxford hip score of 37.8 (SD 9.4). The clinical outcome of revision for pseudotumour was also significantly worse (p < 0.001) than the outcome of matched primary total hip replacements. By contrast, the outcome for fracture and other causes was not significantly different from that of matched primary total hip replacements (p = 0.065). After revision for pseudotumour there were three cases of recurrent dislocation, three of palsy of the femoral nerve, one of stenosis of the femoral artery and two of loosening of the component. Five hips required further revision. In three of these there was evidence of recurrent pseudotumour, and one is currently awaiting further revision. The incidence of major complications after revision for pseudotumour (50%) was significantly higher (p = 0.018) than that after revision for other causes (14%). The outcome of revision for pseudotumour is poor and consideration should be given to early revision to limit the extent of the soft-tissue destruction. The outcome of resurfacing revision for other causes is good.

356 citations


"Feasibility study of micro-groove c..." refers background in this paper

  • ...Also, the articulation generated wear debris contributes to local adverse tissue reactions, which increases the number of revision surgery [5]....

    [...]

Journal ArticleDOI
A. Wang1, A. Essner1, VK Polineni1, C Stark1, John H. Dumbleton1 
TL;DR: The paper focuses on the choice of lubricant, the degree of motion and the positioning of components in joint simulator testing, which is greater with higher doses of irradiation and is much more effective for the hip than for the knee.

336 citations


Additional excerpts

  • ...[29] attributed the detachment of Figure 10....

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