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Implant corrosion

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https://www.readbyqxmd.com/read/29149061/mechanical-corrosion-and-biological-properties-of-room-temperature-sputtered-aluminum-nitride-films-with-dissimilar-nanostructure
#1
Cristina Besleaga, Viorel Dumitru, Liliana Marinela Trinca, Adrian-Claudiu Popa, Constantin-Catalin Negrila, Łukasz Kołodziejczyk, Catalin-Romeo Luculescu, Gabriela-Cristina Ionescu, Razvan-George Ripeanu, Alina Vladescu, George E Stan
Aluminum Nitride (AlN) has been long time being regarded as highly interesting material for developing sensing applications (including biosensors and implantable sensors). AlN, due to its appealing electronic properties, is envisaged lately to serve as a multi-functional biosensing platform. Although generally exploited for its intrinsic piezoelectricity, its surface morphology and mechanical performance (elastic modulus, hardness, wear, scratch and tensile resistance to delamination, adherence to the substrate), corrosion resistance and cytocompatibility are also essential features for high performance sustainable biosensor devices...
November 17, 2017: Nanomaterials
https://www.readbyqxmd.com/read/29144428/resistance-of-magnesium-alloys-to-corrosion-fatigue-for-biodegradable-implant-applications-current-status-and-challenges
#2
REVIEW
R K Singh Raman, Shervin Eslami Harandi
Magnesium (Mg) alloys are attracting increasing interest as the most suitable metallic materials for construction of biodegradable and bio-absorbable temporary implants. However, Mg-alloys can suffer premature and catastrophic fracture under the synergy of cyclic loading and corrosion (i.e., corrosion fatigue (CF)). Though Mg alloys are reported to be susceptible to CF also in the corrosive human body fluid, there are very limited studies on this topic. Furthermore, the in vitro test parameters employed in these investigations have not properly simulated the actual conditions in the human body...
November 16, 2017: Materials
https://www.readbyqxmd.com/read/29128529/laser-processed-calcium-phosphate-reinforced-cocrmo-for-load-bearing-applications-processing-and-wear-induced-damage-evaluation
#3
Himanshu Sahasrabudhe, Susmita Bose, Amit Bandyopadhyay
To mitigate shortcomings in current biomedical CoCrMo alloy, composites of CoCrMo with calcium phosphate (CaP) were envisioned. CoCrMo alloy was reinforced with CaP to enhance the wear resistance of the alloy. A powder based direct energy additive manufacturing technique of Laser Engineered Net Shaping (LENS™) was used for processing of CoCrMo alloy with 1% and 3% (by weight) of CaP in the form of hydroxyapaptite. Addition of CaP was found to stabilize the ε (HCP) phase along with the more common γ (FCC) phase of the CoCrMo alloy, and the microstructure showed discontinuous chromium carbide phase...
November 8, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/29113756/fretting-and-corrosion-damage-in-retrieved-metal-on-polyethylene-modular-total-hip-arthroplasty-systems-what-is-the-importance-of-femoral-head-size
#4
Matthew P Siljander, Erin A Baker, Kevin C Baker, Meagan R Salisbury, Clayton C Thor, James J Verner
BACKGROUND: Fretting and corrosion at the modular femoral head-femoral neck (taper) interface have been reported in retrieved total hip arthroplasty (THA) prostheses. This study investigated associations among implant design, radiographic factors, and patient factors with corrosion and fretting at the taper interface in retrieved metal-on-polyethylene modular THA prostheses. METHODS: Ninety-two retrieved primary metal-on-polyethylene THA implants were evaluated and graded for fretting, corrosion, and damage at the taper interface, including the femoral stem trunnion and femoral head...
October 16, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29105561/failure-of-an-accis-metal-on-metal-hip-resurfacing-prosthesis-a-case-report
#5
Martin C Bone, Andrew Naylor
The introduction of coatings on joint replacements was intended to reduce wear volumes, prevent corrosion and reduce metal ion release. However, retrieval analysis to confirm their in vivo performance has been limited. The aim of study was to examine the coating on a retrieved hip prosthesis to determine whether substantial damage or wear had occurred. A single advanced ceramic-coated implant systems titanium niobium nitride-coated hip resurfacing prosthesis was retrieved for examination. Wear volumes and surface roughness were measured to quantify the damage to the articulating surfaces...
November 1, 2017: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/29102795/enhanced-antimicrobial-activity-of-naturally-derived-bioactive-molecule-chitosan-conjugated-silver-nanoparticle-against-dental-implant-pathogens
#6
Darshan Devang Divakar, Nahla Talal Jastaniyah, Hazem Ganem Altamimi, Yasser Obaidallah Alnakhli, Muzaheed, Abdulaziz Abdullah Alkheraif, Shaista Haleem
Various metal coated implants have been tested against dental pathogens which causes increased biofilm formation and lead to failure of dental implants. The possibility of using nanoparticle together with native biomolecules to enhance the activity of such bioactive compound is also in progress. In this study we tested the efficacy of Ag conjugated chitosan nanoparticles as a prospective coating material of titanium dental implants. Known bioactive molecule chitosan was extracted from A. flavus Af09 and conjugated with Ag nanoparticle...
November 1, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29100204/finite-element-wear-prediction-using-adaptive-meshing-at-the-modular-taper-interface-of-hip-implants
#7
Thom Bitter, Imran Khan, Tim Marriott, Elaine Lovelady, Nico Verdonschot, Dennis Janssen
The use of modular components in total hip arthroplasty introduced an additional interface with the potential for fretting and corrosion to occur. Fretting and corrosion at this interface have been reported as a potential cause of early failure of the implant system. Using finite element (FE) analyses the mechanics at the taper junction can be studied. However, most FE studies are based on a single load condition and do not take geometry changes over time into account. Therefore, in this study an FE routine was developed, in which adaptations to the implant geometry are made to account for material removal during the fretting process...
October 27, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/29098919/current-methods-of-preventing-aseptic-loosening-and-improving-osseointegration-of-titanium-implants-in-cementless-total-hip-arthroplasty-a-review
#8
Dragos Apostu, Ondine Lucaciu, Cristian Berce, Dan Lucaciu, Dan Cosma
Hip osteoarthritis is the most common joint disorder, and is represented by a degenerative process, resulting in pain and functional impairment. If conservative treatment for hip osteoarthritis fails, the only remaining option is hip arthroplasty. Despite good survival of implants, loosening of components is the most common complication. This leads to revision surgeries, which are technically demanding, expensive, and result in a low satisfaction rate. Uncemented hip replacements require proper osseointegration for increased survival...
January 1, 2017: Journal of International Medical Research
https://www.readbyqxmd.com/read/29089642/the-effects-of-static-and-dynamic-loading-on-biodegradable-magnesium-pins-in-vitro-and-in-vivo
#9
Youngmi Koo, Hae-Beom Lee, Zhongyun Dong, Ruben Kotoka, Jagannathan Sankar, Nan Huang, Yeoheung Yun
Here we systematically assess the degradation of biodegradable magnesium pins (as-drawn pure Mg, as-cast Mg-Zn-Mn, and extruded Mg-Zn-Mn) in a bioreactor applying cyclical loading and simulated body fluid (SBF) perfusion. Cyclical mechanical loading and interstitial flow accelerated the overall corrosion rate, leading to loss of mechanical strength. When compared to the in vivo degradation (degradation rate, product formation, uniform or localized pitting, and stress distribution) of the same materials in mouse subcutaneous and dog tibia implant models, we demonstrate that the in vitro model facilitates the analysis of the complex degradation behavior of Mg-based alloys in vivo...
October 31, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29061284/corrosion-behavior-of-titanium-in-response-to-sulfides-produced-by-porphyromonas-gingivalis
#10
Rino Harada, Eitoyo Kokubu, Hideaki Kinoshita, Masao Yoshinari, Kazuyuki Ishihara, Eiji Kawada, Shinji Takemoto
OBJECTIVE: To investigate the effects of sulfides produced by Porphyromonas gingivalis (P. gingivalis) on the corrosion behavior of titanium. METHODS: Commercially pure titanium disks were mirror-polished and immersed in culture medium (BHI), spent medium after culturing P. gingivalis (BHI-S), and culture medium with P. gingivalis (BHI-P), and incubated aerobically at 37°C for 3-14 days. Titanium corrosion was evaluated through surface observation (using scanning electron microscope: SEM), color change (ΔE*ab), glossiness (Gs(20°)), chemical composition and state (using X-ray photoelectron spectroscopy: XPS), and titanium release...
October 20, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/29058878/influence-of-porosity-and-pore-size-distribution-in-ti6al4-v-foam-on-physicomechanical-properties-osteogenesis-and-quantitative-validation-of-bone-ingrowth-by-micro-computed-tomography
#11
Kausik Kapat, Pavan Kumar Srivas, Arun Prabhu Rameshbabu, Priti Prasanna Maity, Subhodeep Jana, Joy Dutta, Pallab Majumdar, Debalay Chakrabarti, Santanu Dhara
Cementless fixation for orthopedic implants aims to obviate challenges associated with bone cement, providing long-term stability of bone prostheses after implantation. The application of porous titanium and its alloy-based implants is emerging for load-bearing applications due to their high specific strength, low stiffness, corrosion resistance, and superior osteoconductivity. In this study, coagulant-assisted foaming was utilized for the fabrication of porous Ti6Al4 V using egg-white foam. Samples with three different porosities of 68...
November 2, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29057837/magnetron-sputtering-as-a-fabrication-method-for-a-biodegradable-fe32mn-alloy
#12
Till Jurgeleit, Eckhard Quandt, Christiane Zamponi
Biodegradable metals are a topic of great interest and Fe-based materials are prominent examples. The research task is to find a suitable compromise between mechanical, corrosion, and magnetic properties. For this purpose, investigations regarding alternative fabrication processes are important. In the present study, magnetron sputtering technology in combination with UV-lithography was used in order to fabricate freestanding, microstructured Fe32Mn films. To adjust the microstructure and crystalline phase composition with respect to the requirements, the foils were post-deposition annealed under a reducing atmosphere...
October 18, 2017: Materials
https://www.readbyqxmd.com/read/29048694/effect-of-sleeved-ceramic-femoral-heads-on-titanium-ion-release
#13
Anthony Deny, Janie Barry, Jonathan R B Hutt, Martin Lavigne, Vincent Massé, Pascal-André Vendittoli
INTRODUCTION: Metal ion release from wear and corrosion at the femoral head-stem taper junction can evoke local adverse reactions to metal debris (ARMD). In a specific large-diameter head (LDH) total hip arthroplasty (THA) system, ceramic femoral heads of 44 to 48 mm are available with a titanium (Ti) adaptor sleeve, while heads of 36- to 40-mm come without sleeves. The hypothesis of this study is that the Ti adaptor sleeve with LDH ceramic-on-ceramic (CoC) bearings will not cause wear or corrosion at the taper junction and, thus, will not generate high whole blood Ti ion levels...
October 16, 2017: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
https://www.readbyqxmd.com/read/29033155/does-the-additional-articulation-in-retrieved-bipolar-hemiarthroplasty-implants-decrease-trunnionosis-compared-to-total-hip-arthroplasty
#14
Christopher Del Balso, Matthew G Teeter, Sok C Tan, Brent A Lanting, James L Howard
BACKGROUND: Trunnionosis at the modular head-neck taper interface in metal-on-polyethylene total hip arthroplasty (MoP THA) has been shown to occur, and represents a potential mode of MoP THA failure. The purpose of the present investigation is to elucidate differences in fretting and corrosion at the head-neck taper interface of prostheses retrieved from bipolar hemiarthroplasty (BH) and MoP THA. METHODS: A retrieval analysis of BH and MoP THA prostheses featuring a single taper design from a single manufacturer and in vivo for a minimum 2 years was performed...
August 31, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28990317/an-in-vitro-and-in-vivo-characterization-of-fine-we43b-magnesium-wire-with-varied-thermomechanical-processing-conditions
#15
Adam J Griebel, Jeremy E Schaffer, Tracy M Hopkins, Alaa Alghalayini, Tinomudaishe Mkorombindo, Kolade O Ojo, Zhigang Xu, Kevin J Little, Sarah K Pixley
Absorbable implants made of magnesium alloys may revolutionize surgical intervention, and fine magnesium wire will be critical to many applications. Functionally, the wires must have sufficient mechanical properties to withstand implantation and in-service loading, have excellent tissue tolerance, and exhibit an appropriate degradation rate for the application. Alloy chemistry and thermomechanical processing conditions will significantly impact the material's functional performance, but the exact translation of these parameters to implant performance is unclear...
October 9, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28987782/development-of-magnesium-based-biodegradable-metals-with-dietary-trace-element-germanium-as-orthopaedic-implant-applications
#16
Dong Bian, Weirui Zhou, Jiuxu Deng, Yang Liu, Wenting Li, Xiao Chu, Peng Xiu, Hong Cai, Yuhui Kou, Baoguo Jiang, Yufeng Zheng
From the perspective of element biosafety and dietetics, the ideal alloying elements for magnesium should be those which are essential to or naturally presented in human body. Element germanium is a unique metalloid in the carbon group, chemically similar to its group neighbors, Si and Sn. It is a dietary trace element that naturally presents in human body. Physiological role of Ge is still unanswered, but it might be necessary to ensure normal functioning of the body. In present study, novel magnesium alloys with dietary trace element Ge were developed...
December 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28983216/ceramic-bearings-with-titanium-adapter-sleeves-implanted-during-revision-hip-arthroplasty-show-minimal-fretting-or-corrosion-a-retrieval-analysis
#17
Chelsea N Koch, Mark Figgie, Mark P Figgie, Marcella E Elpers, Timothy M Wright, Douglas E Padgett
BACKGROUND: The BIOLOX® option system, consisting of a BIOLOX® delta ceramic femoral head with a titanium alloy adapter sleeve, is being increasingly utilized in revision hip arthroplasty. The sleeve protects the ceramic head from fracture and improper motion about the stem trunnion when a damaged trunnion is encountered at revision surgery. Corrosion and fretting due to metal-metal contact at the taper region of hip prosthesis create the potential of causing periprosthetic osteolysis and adverse local tissue reactions...
October 2017: HSS Journal: the Musculoskeletal Journal of Hospital for Special Surgery
https://www.readbyqxmd.com/read/28975693/surface-modification-of-valve-metals-using-plasma-electrolytic-oxidation-peo-for-antibacterial-applications-a-review
#18
REVIEW
M Rizwan, Rodianah Alias, Umi Zhalilah Zaidi, Reza Mahmoodian, M Hamdi
Plasma electrolytic oxidation (PEO) is an advance technique to develop porous oxidation layer on light metals, primarily to enhance corrosion and wear resistance. The oxidation layer can also offer a wide variety of mechanical, biomedical, tribological and antibacterial properties through the incorporation of several ions and particles. Due to the increasing need of antimicrobial surfaces for biomedical implants, antibacterial PEO coatings have been developed through the incorporation of antibacterial agents...
October 4, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/28974094/electrophoretic-deposition-of-gentamicin-loaded-silk-fibroin-coatings-on-3d-printed-porous-cobalt-chromium-molybdenum-bone-substitutes-to-prevent-orthopedic-implant-infections
#19
Changjun Han, Yao Yao, Xian Cheng, Jiaxin Luo, Pu Luo, Qian Wang, Fang Yang, Qingsong Wei, Zhen Zhang
In addition to customizing shapes of metal bone substitutes for patients, the 3D printing technique can reduce the modulus of the substitutes through the design and manufacture of interconnected porous structures, achieving the modulus match between substitute and surrounding bone to improve implant longevity. However, the porous bone substitutes take more risks of postoperative infection due to its much larger surface area compared with the traditional casting solid bone substitute. Here, we prepared of gentamicin-loaded silk fibroin coatings on 3D-printed porous cobalt-chromium-molybdenum (CoCrMo) bone substitutes via electrophoretic deposition technique...
October 16, 2017: Biomacromolecules
https://www.readbyqxmd.com/read/28972737/friction-stir-processing-of-stainless-steel-for-ascertaining-its-superlative-performance-in-bioimplant-applications
#20
G Perumal, A Ayyagari, A Chakrabarti, D Kannan, S Pati, H S Grewal, S Mukherjee, S Singh, H S Arora
Substrate-cell interactions for a bioimplant are driven by substrate's surface characteristics. In addition, the performance of an implant and resistance to degradation are primarily governed by its surface properties. A bioimplant typically degrades by wear and corrosion in the physiological environment, resulting in metallosis. Surface engineering strategies for limiting degradation of implants and enhancing their performance may reduce or eliminate the need for implant removal surgeries and the associated cost...
October 13, 2017: ACS Applied Materials & Interfaces
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