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Thiago A Simoes, Michael G Bryant, Andy P Brown, Steven J Milne, Mary Ryan, Anne Neville, Rik Brydson
: We have characterized CoCrMo, Metal-on-Metal (MoM) implant, wear debris particles and their dissolution following cycling in a hip simulator, and have related the results to the tribocorrosion of synthetic wear debris produced by milling CoCrMo powders in solutions representative of environments in the human body. Importantly, we have employed a modified ICP-MS sample preparation procedure to measure the release of ions from CoCrMo alloys during wear simulation in different media; this involved use of nano-porous ultrafilters which allowed complete separation of particles from free ions and complexes in solution...
November 2016: Acta Biomaterialia
Isabella da Silva Vieira Marques, Maria Fernanda Alfaro, Miki Taketomi Saito, Nilson Cristino da Cruz, Christos Takoudis, Richard Landers, Marcelo Ferraz Mesquita, Francisco Humberto Nociti Junior, Mathew T Mathew, Cortino Sukotjo, Valentim Adelino Ricardo Barão
Biofunctionalized surfaces for implants are currently receiving much attention in the health care sector. Our aims were (1) to create bioactive Ti-coatings doped with Ca, P, Si, and Ag produced by microarc oxidation (MAO) to improve the surface properties of biomedical implants, (2) to investigate the TiO2 layer stability under wear and corrosion, and (3) to evaluate human mesenchymal stem cells (hMSCs) responses cultured on the modified surfaces. Tribocorrosion and cell experiments were performed following the MAO treatment...
2016: Biointerphases
Young-Min Kwon, Valentin Antoci, Eric Eisemon, Tsung-Yuan Tsai, Yu Yan, Ming Han Lincoln Liow
BACKGROUND: Contemporary "dual-taper" modular femoral neck-stem designs have been associated with taper corrosion-related adverse local tissue reaction (ALTR) requiring revision surgery and stem removal. Extended trochanteric osteotomy is recognized as the workhorse procedure for revision hip surgery. The aim of our study is to describe our "top-out" stem removal surgical technique and identify preoperative radiographic risk factors associated with periprosthetic fractures when using this technique...
June 17, 2016: Journal of Arthroplasty
Johannes A Eckert, Ulrike Mueller, Sebastian Jaeger, Benjamin Panzram, J Philippe Kretzer
Tribocorrosion in taper junctions of retrieved anatomic shoulder arthroplasty implants was evaluated. A comparison of the tribocorrosion between cobalt-chromium and titanium alloy stems was conducted and the observations were correlated with the individual's clinical data. Adverse effects caused by metal debris and subsequent elevated serum metal ion levels are frequently reported in total hip arthroplasty. In total shoulder arthroplasty, to date only a small number of retrieval analyses are available and even fewer address the issue of tribocorrosion at the taper junctions...
2016: BioMed Research International
Natalie Shearwood-Porter, Martin Browne, James A Milton, Matthew J Cooper, Martin R Palmer, Jeremy M Latham, Robert J K Wood, Richard B Cook
The occurrence of damage on polished femoral stems has been widely reported in the literature, and bone cement has been implicated in a tribocorrosive failure process. However, the mechanisms of cement-mediated damage and the impact of cement formulation on this process are not well understood. In this study, 13 Zimmer CPT polished femoral stems, and the corresponding cement specimens were retrieved at revision surgery and analyzed using high-resolution imaging techniques. Surface damage attributed to tribocorrosion was observed on all stems...
July 4, 2016: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
Tulia Espinosa, José Sanes, María-Dolores Bermúdez
The use of newly synthesized alkylether-thiazolium ionic liquids as lubricants is described for the first time. Two ionic liquids composed of a thiazolium cation and a bis(trifluoromethanesulfonyl)amide ([Th][Tf2N]) or dicyanamide ([Th][(NC)2N]) anion have been studied, and their tribological behavior has been compared with that of 1-butyl-3-methylimidazolium bis(trifluoromethanesulfonyl)amide ([Im][Tf2N]) in pin-on-disk tests using sapphire balls against AISI 52100 or AISI 316L steels. All ionic liquids show higher contact angles on AISI 316L steel than on AISI 52100, the lowest values found for ([Im][Tf2N]) on both steel surfaces...
July 20, 2016: ACS Applied Materials & Interfaces
Guo-Hua Zhao, Ragnhild E Aune, Nuria Espallargas
The medical grade pure titanium, stainless steel and CoCrMo alloy have been utilized as biomaterials for load-bearing orthopedic prosthesis. The conventional surgery metals suffer from a combined effect of wear and corrosion once they are implanted, which may significantly accelerate the material degradation process. In this work, the tribocorrosion performance of the metallic biomaterials with different surface modifications was studied in the simulated body fluid for the purpose of investigating the effect of the surface treatments on the tribocorrosion performance and eventually finding the most suitable implantation materials...
October 2016: Journal of the Mechanical Behavior of Biomedical Materials
Nengbin Hua, Wenzhe Chen, Weiguo Wang, Haotian Lu, Xiaoyun Ye, Guanghui Li, Chen Lin, Xufang Huang
In this study, the tribological behavior of a Ni-free Zr53Al16Co23·25Ag7.75 bulk metallic glass (BMG) was investigated in dry-sliding and simulated physiological media using ball-on-disk reciprocating friction. The effects of sliding load, speed, media and counterpart materials on the wear resistance of the Zr-Al-Co-Ag BMG were illustrated. Under dry-sliding in air, wear resistance of the Zr-based BMG decreases with increasing sliding load, and wear deterioration is controlled by oxidation and abrasive wear...
September 1, 2016: Materials Science & Engineering. C, Materials for Biological Applications
Zhongwei Wang, Yu Yan, Yanjing Su, Lijie Qiao
Under tribological contact, the subsurface microstructure of CoCrMo alloys for artificial joint implants can be changed and affect the life and safety of such devices. As one of the most important and abundant components in the synovial fluid, proteins play a key role in affecting the bio-tribocorrosion behaviors of metal implants. The effect of proteins on the subsurface microstructure evolution of a CoCrMo alloy was investigated using a transmission electron microscope (TEM) in this study. The result shows that proteins have two main effects on the subsurface's evolution: forming a multilayered structure and causing severer subsurface deformation...
September 1, 2016: Colloids and Surfaces. B, Biointerfaces
Y Sun, P A Dearnley, Bertram Mallia
Two duplex coatings, Cr(N)/S and Cr(C)/S, were deposited on 316 L stainless steel by magnetron sputtering. The effectiveness of these duplex coatings in improving the tribocorrosion behavior of medical alloys under elastic contact conditions has been demonstrated in a recent publication. The present work focused on the response of these duplex coatings to tribocorrosion under plastic contact conditions. Tribocorrosion tests were conducted in 0.89% NaCl solution at 37°C at an initial contact pressure of 740 MPa and under unidirectional sliding conditions for sliding duration up to 24 h...
April 27, 2016: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
Sok Chuen Tan, Adrian C K Lau, Christopher Del Balso, James L Howard, Brent A Lanting, Matthew G Teeter
BACKGROUND: This matched-cohort study aims to compare tribocorrosion between matched ceramic and cobalt-chromium femoral head trunnions and between matched Oxinium and cobalt-chromium femoral head trunnions. Secondary objectives were to investigate whether taper design, depth of trunnion, implantation time, age, body mass index, and gender have an effect on fretting and corrosion. METHODS: All hip prostheses retrieved between 1999 and 2015 at one center were reviewed, giving a total of 52 ceramic heads...
September 2016: Journal of Arthroplasty
Christopher Del Balso, Matthew G Teeter, Sok Chuen Tan, James L Howard, Brent A Lanting
BACKGROUND: Wear and tribocorrosion at the modular head-neck taper interface may be a cause of failure in metal-on-polyethylene total hip arthroplasty (THA). The present investigation endeavored to elucidate the effect of femoral head diameter on fretting and corrosion in retrieved head-neck tapers. METHODS: A retrieval analysis of THA prostheses in vivo for a minimum of 1 year was performed. Twenty-three femoral heads of 32-mm diameter were matched with 28-mm heads based on time in vivo and head length (-3 mm to +8 mm)...
October 2016: Journal of Arthroplasty
Nadim J Hallab
Almost 20% of joint replacement implants fail at 15 to 20 years. Reports suggest that systemic effects of metal-on-metal implants and local effects of total joint arthroplasty implants contributing to implant failure are immune system based. Sometimes implant wear debris can cause implant failure resulting from bone fracture, infection, or implant fracture/failure; most often, aseptic osteolysis or loosening leads to wear debris. Debris is produced by wear (primary) or by corrosion. Corrosion-chemical oxidation comprising reduction reactions involving electron transport-produces electrochemical degradation...
April 2016: Spine
F Toptan, A Rego, A C Alves, A Guedes
Poor wear resistance of titanium is a major concern since relative movements due to the cyclic loads in body environment cause wear between the bone and the implant material leading to detachment of the wear debris and release of metal ions due to the simultaneous action of corrosion and wear, defined as tribocorrosion. In order to increase the tribocorrosion resistance, Grade 2 Ti matrix 24vol% B4C particle reinforced composites were processed by hot pressing. Corrosion behaviour was investigated by electrochemical impedance spectroscopy and potentiodynamic polarization in 9g/L NaCl solution at body temperature...
August 2016: Journal of the Mechanical Behavior of Biomedical Materials
Guo-Hua Zhao, Ragnhild E Aune, Huahai Mao, Nuria Espallargas
Owing to the amorphous structure, Bulk Metallic Glasses (BMGs) have been demonstrating attractive properties for potential biomedical applications. In the present work, the degradation mechanisms of Zr-based BMGs with nominal compositions Zr55Cu30Ni5Al10 and Zr65Cu18Ni7Al10 as potential load-bearing implant material were investigated in a tribocorrosion environment. The composition-dependent micro-mechanical and tribological properties of the two BMGs were evaluated prior to the tribocorrosion tests. The sample Zr65-BMG with a higher Zr content exhibited increased plasticity but relatively reduced wear resistance during the ball-on-disc tests...
July 2016: Journal of the Mechanical Behavior of Biomedical Materials
Isabella da Silva Vieira Marques, Maria Fernanda Alfaro, Nilson Cristino da Cruz, Marcelo Ferraz Mesquita, Christos Takoudis, Cortino Sukotjo, Mathew T Mathew, Valentim Adelino Ricardo Barão
Dental implants, inserted into the oral cavity, are subjected to a synergistic interaction of wear and corrosion (tribocorrosion), which may lead to implant failures. The objective of this study was to investigate the tribocorrosion behavior of Ti oxide films produced by micro-arc oxidation (MAO) under oral environment simulation. MAO was conducted under different conditions as electrolyte composition: Ca/P (0.3M/0.02M or 0.1M/0.03M) incorporated with/without Ag (0.62g/L) or Si (0.04M); and treatment duration (5 and 10min)...
July 2016: Journal of the Mechanical Behavior of Biomedical Materials
Leiming Gao, Duncan Dowson, Robert W Hewson
The lubrication regime in which artificial hip joints operate adds complexity to the prediction of wear, as the joint operates in both the full fluid film regime-specifically the elastohydrodynamic lubrication (EHL) regime-and the mixed or boundary lubrication regimes, where contact between the bearing surfaces results in wear. In this work, a wear model is developed which considers lubrication for the first time via a transient EHL model of metal-on-metal hip replacements. This is a framework to investigate how the change in film thickness influences the wear, which is important to further investigation of the complex wear procedure, including tribocorrosion, in the lubricated hip implants...
November 11, 2015: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
Miguel Sampaio, Mihaela Buciumeanu, Bruno Henriques, Filipe S Silva, Júlio C M Souza, José R Gomes
In dentistry, prosthetic structures must be able to support masticatory loads combined with a high biocompatibility and wear resistance in the presence of a corrosive environment. In order to improve the simultaneous wear and corrosion response of highly biocompatible prosthetic structures, a veneering poly-ether-ether-ketone (PEEK) to Ti6Al4V substrate was assessed by tribocorrosion analyses under conditions mimicking the oral environment. Samples were synthesized by hot pressing the PEEK veneer onto Ti6Al4V cylinders...
February 2016: Journal of the Mechanical Behavior of Biomedical Materials
C Del Balso, M G Teeter, S C Tan, B A Lanting, J L Howard
Tribocorrosion at the head-neck taper interface - so-called 'taperosis' - may be a source of metal ions and particulate debris in metal-on-polyethylene total hip arthroplasty (THA). We examined the effect of femoral head length on fretting and corrosion in retrieved head-neck tapers in vivo for a minimum of two years (mean 8.7 years; 2.6 to 15.9). A total of 56 femoral heads ranging from 28 mm to 3 mm to 28 mm + 8 mm, and 17 femoral stems featuring a single taper design were included in the study. Fretting and corrosion were scored in three horizontally oriented concentric zones of each taper by stereomicroscopy...
July 2015: Bone & Joint Journal
A R Ribeiro, F Oliveira, L C Boldrini, P E Leite, P Falagan-Lotsch, A B R Linhares, W F Zambuzzi, B Fragneaud, A P C Campos, C P Gouvêa, B S Archanjo, C A Achete, E Marcantonio, L A Rocha, J M Granjeiro
Titanium (Ti) is commonly used in dental implant applications. Surface modification strategies are being followed in last years in order to build Ti oxide-based surfaces that can fulfill, simultaneously, the following requirements: induced cell attachment and adhesion, while providing a superior corrosion and tribocorrosion performance. In this work micro-arc oxidation (MAO) was used as a tool for the growth of a nanostructured bioactive titanium oxide layer aimed to enhance cell attachment and adhesion for dental implant applications...
September 2015: Materials Science & Engineering. C, Materials for Biological Applications
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