Particles and Ions Generated in Total Hip Joint Prostheses: In Vitro Wear Test Results of UHMWPE and XLPE Acetabular Components

Zohdi, Hamoon; Andreatta, Benjamin; Heuberger, Roman

doi:10.1007/s11249-017-0872-2

Cited by 7 publications

(2 citation statements)

References 66 publications

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“…Cobalt–chromium–molybdenum (CoCrMo) alloys are widely used in dental (Henriques et al , 2014) and artificial joint restoration applications (Kretzer et al , 2011; Zohdi et al , 2017) owing to their high corrosion resistance and excellent mechanical properties. However, traditional technologies, including casting, forging and hot pressing, need very complex processing, which might take time for the patients.…”

Section: Introductionmentioning

confidence: 99%

Effect of the heat treatment on corrosion and mechanical properties of CoCrMo alloys manufactured by selective laser melting

Zhang

Yang

Song

et al. 2018

RPJ

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PurposeThis study aims to focus on the heat treatment influence on the corrosion resistance, adhesion of Streptococcus mutans and mechanical properties of CoCrMo alloys manufactured by the selective laser melting (SLM). Design/methodology/approachCoCrMo alloys were manufactured using the Dimetal-100 machine. X-ray diffraction (XRD), metallographic analysis, scanning electron microscopy (SEM), electrochemical corrosion, Vickers microhardness and tensile tests were used to characterize SLM-produced CoCrMo alloys and compare them with the ones manufactured by casting and with the ASTM F75 standard. FindingsThe electrochemical results showed that SLM900 samples had the best corrosion resistance in artificial saliva. The adhesion results showed least propagation and overall quantity of Streptococcus mutans on the SLM900 sample. The microhardness, tensile and yield strength of As-SLM, SLM900 and SLM1200D samples were measured according to the ASTM F75 standard. The elongation of SLM900 was less than 8 per cent, which does not meet the standard specifications. Analysis of the fracture morphology showed that the fracture mechanisms of As-SLM and SLM1200D belong to the quasi-cleavage fracture type, and the mechanical fracture mechanism of SLM900 can be characterized as brittle fracture. Originality/valueThis paper presents the adhesion properties of Streptococcus mutans on the surface of CoCrMo alloys manufactured by SLM and proposes how to regulate the effect of the heat treatment on the corrosion resistance and mechanical properties of CoCrMo alloys manufactured by SLM.

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Section: Introductionmentioning

confidence: 99%

Effect of the heat treatment on corrosion and mechanical properties of CoCrMo alloys manufactured by selective laser melting

Zhang

Yang

Song

et al. 2018

RPJ

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“…The phenomenon is easily observed for UHMWPE and XLPE in synovial fluid at 37°C, while VE-XLPE is observed in synovial fluid at 46°C and 55°C, which to some extent reflects the stronger aging resistance of VE-XLPE compared to UHMWPE and XLPE. 58 In addition, it is not difficult to find from Table 4 that the Zr element also changes with the increase of the sliding fluid temperature, such as the Zr element has a significant increase in the elemental distribution of the wear zone at the synovial fluid temperature of XLPE at 55°C and VE-XLPE at 46°C. This indicates that material transfer occurs during the friction test, the wear is in the form of adhesive wear, and the higher synovial fluid temperature causes protein denaturation leading to increased adhesive wear, 59 which is more obvious during the friction at 46°C synovial fluid.…”

Section: Resultsmentioning

confidence: 99%

Effect of synovial fluid temperature on wear resistance of different polymer acetabular materials

Wang

Lin

et al. 2023

J Biomater Appl

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In order to investigate the effect of frictional heat on the wear resistance characteristics of polymeric acetabular materials, the tribological tests and wear numerical analysis of three common polymer acetabular materials were carried out under different synovial fluid temperatures. The study results show that XLPE and VE-XLPE exhibit superior wear resistance compared to UHMWPE in high-temperature, heavy load environments. The coefficient of friction of three materials gradually decreases as the temperature of the synovial fluid increases. The wear depth and wear volume of the three materials increased with the increase of the temperature of the synovial fluid, and the forms of wear at 46°C and 55°C were mainly adhesive wear and plastic deformation. The higher temperature of the synovial fluid accelerates the oxidative degradation of the material surface and generates oxidation functional groups, which leads to the breakage of C-C bonds in the surface molecular chains under the sliding shear effect, thus reducing the mechanical properties of the material. Specifically, the surface of the polymer material will soften at a higher ambient temperature, mainly due to the decrease of hardness, and then deteriorate in the friction property, and finally increase the wear rate. Ansys results showed that the volume wear of the three materials increased with the increase of synovial fluid temperature, and the trend could be approximately linear. Numerical calculations predict that VE-XLPE has the highest wear of 0.693 mm3 among the three materials at 37°C, followed by XLPE at 0.568 mm3 and UHMWPE with the lowest wear of 0.478 mm3. At higher synovial fluid temperatures (46°C, 55°C), VE-XLPE still has the largest wear volume among the three materials, while XLPE and UHMWPE have similar wear. The wear cloud pictures showed that the maximum wear volume occurred near the edge of the acetabulum.

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High Wear Resistance of Ultralow-Wear Polyethylene with Different Molecular Weights Under Different Contact Pressure

et al. 2022

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Ultralow-wear polyethylene (ULWPE), a type of polyethylene homocomposite with excellent wear resistance, has recently been reported, however its underlying wear mechanism has yet to be clari ed. In the current study, three different molecular weights of ULWPE from 205 to 748 Kg/mol, were experimentally evaluated on a multidirectional motion pin-on-disk (POD) wear tester under a contact pressure from 2 to 4 MPa, compared with conventional UHMWPE. The high wear resistance mechanism of ULWPE was investigated with respect to mechanical, microstructural, and surface properties. Compared with UHMWPE, ULWPE had excellent wear resistance. Structure and mechanical characterization showed that the crystallinity and lamellar thickness of ULWPE were signi cantly higher than those of UHMWPE, which endowed ULWPE with high hardness and strength. Despite its considerably smaller molecular weight than that of UHMWPE, ULWPE still had high interphase content, leading to its superior toughness. The crystallinity, lamellar thickness, Young's modulus, yield stress, and elongation at break of ULWPE exhibited a downward trend with the increase of molecular weight. Conversely, the interphase content of ULWPE increased with the molecular weight increase. Among all the ULWPE samples, ULWPE with a molecular weight 748 Kg•mol -1 had the least wear, as a result of combined both excellent strength and adequate toughness. With an increase in contact pressure, the wear losses of different polymers tended to increase. The wear losses of the least wear ULWPE were 4.71±0.04 mm 3 /Million Cycles (Mc), 5.11±0.37 mm 3 /Mc, and 5.77±0.62 mm 3 /Mc under 2, 3, and 4 MPa. Comprehensive strength and toughness reduced abrasive wear and adhesion wear, endowing ULWPE with excellent wear resistance. Highlights 1. ULWPE with a relatively low molecular weight had excellent wear resistance compared with UHMWPE.2. High antiwear properties of ULWPE owing to its excellent strength and good toughness.3. Among all the ULWPE samples, ULWPE with a molecular weight 748 Kg•mol-1 had the least wear under all loading conditions.

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Particles and Ions Generated in Total Hip Joint Prostheses: In Vitro Wear Test Results of UHMWPE and XLPE Acetabular Components

Cited by 7 publications

References 66 publications

Effect of the heat treatment on corrosion and mechanical properties of CoCrMo alloys manufactured by selective laser melting

Effect of the heat treatment on corrosion and mechanical properties of CoCrMo alloys manufactured by selective laser melting

Effect of synovial fluid temperature on wear resistance of different polymer acetabular materials

High Wear Resistance of Ultralow-Wear Polyethylene with Different Molecular Weights Under Different Contact Pressure

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