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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 22 for “"Orthopedic implants"”.
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Design, Material and Surgical Assembly Effects on Fretting Corrosion Behavior of Modular Tapers in Orthopedic Implants
… (MACC) has become a significant problem in the orthopedic device industry, particularly in modular devices with metal-on-metal (MoM) tapered interfaces. Oxide film abrasion, leading to fretting corrosion in the presence of a crevice, accelerates the corrosion process and in some instances may …
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A Feasible Method to Evaluate RF-Induced Heating Behavior of Passive Orthopedic Implants in Human Body
… human body, especially patients with orthopedic healthcare products. Numerical studies were already conducted to illustrate the difference of RF-induced heating on medical plates between phantom and human body. It is necessary to study the intrinsic mechanism of RF-induced heating in …
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MRI Safety Concerns: Anatomy Impacts on Radiofrequency Induced Heating and Implant Impacts on Gradient Induced Peripheral Nerve Stimulation
… on the RF-induced heating and the impact of orthopedic implants on the gradient-induced PNS are investigated. The influence of minor postures and body-loop postures on the RF-induced heating for the patients without implants and patients with Active Implanted Medical Devices (AIMD) are …
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Propionibacterium acnes and its phages
… and is known to cause severe inflammations on orthopedic implants. However, like most bacteria, P. acnes can be infected by specific bacterial viruses, eg. bacteriophages. If those can contribute to the progress of the diseases mentioned is unknown. In this thesis we have investigated the role …
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Fabrication and corrosion assessment of biodegradable metallic alloys for patient-specific bone implant applications
… dissolve after their service lifetime. Permanent implants are often much stiffer than the bone they are supporting, which can lead to loss of bone density, mechanical failure of the implant, and require corrective surgery. Biodegradable orthopedic implants offer strength and stiffness close to …
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Nanoscale influences on bioactivity : ultrastructure and nanomechanics of model bioactive hydroxyapatite based biomaterials
… need for improved synthetic materials as orthopedic implants to replace human bone lost and damaged due to disease or injury. Certain ceramics, such as hydroxyapatite (HA), have the special property of being bioactive, meaning that an interfacial bond between the implant and the …
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Nanostructured apatites as orthopedic biomaterials
… a priority in designing permanent, load-bearing orthopedic implants. As a result, the biomaterials used in these implants have been largely limited to bioinert titanium-based alloys, as well as to polycrystalline alumina and zirconia ceramics. However, analysis of implants incorporating these …
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Polyelectrolyte multilayers for tunable release of antibiotics and other therapeutics
… and characterization of a multi-drug coating for orthopedic implants for dual antimicrobial and tissue regenerative actions.
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Hydrogen induced surface cracking of two orthopedic implant alloys
… between hydrogen embrittlement and failure of orthopedic implants, suggest that orthopedic applications should use H.I.P. ZIMALOY in preference to 316 stainless steel whenever possible, and that when the use of 316 stainless steel is unavoidable, HERFed parts should be used. Further …
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Biofilm Removal with Acoustic Cavitation and Lavage
<p>Bacterial biofilm colonies attached to orthopedic implants, and surrounding tissues resist to antibiotic treatments, prolong hospitalization, increase mortality, and usually require the removal and replacement of the entire joint. Through acoustic cavitation, it could be possible to remove the …
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Evaluation of stress state on the mechanical properties of 3D printed metallic lattice structures fabricated via laser powder bed fusion for orthopedic applications
… of 3D printed porous metallic scaffolds in orthopedic implants, specifically Laser Powder Bed Fusion (LPBF). Once implanted, these devices experience complex stress states under physiological loading. To design these structures to mimic the mechanical behavior of bone, their performance …
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Design of Lightweight Magnesium Alloys: Processing, Microstructure and Properties
… it an excellent alternative to other metals for orthopedic implants. Unfortunately, magnesium shows di erent deformation depending on the loading direction: its tensile deformation resembles typical metallic behavior while its compression has a unique, twinning region of the stress-strain curve. …
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Development And Application Of Biomimetic Electrospun Nanofibers In Total Joint Replacement
… and loosening. There is a critical need for orthopedic implants that promote rapid osseointegration and prevent bacterial colonization, particularly when placed in bone compromised by disease or physiology of the patients. A better understanding of the key factors that influence cell fate …
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Design, characterization, and reinforcement of mineralized collagen-glycosaminoglycan scaffolds for orthopedic wound repair
The treatment of craniofacial orthopedic defects remains a challenge due to the large size, complex geometry, and load bearing aspects that often accompany such defects. The typical treatment or correction of craniofacial defects employed during surgical intervention of such injuries often …
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Engineering Considerations for Treatment of Prosthetic Joint Infections Using Alternating Magnetic Fields (AMF)
Treatment of infected orthopedic implants presents a major medical challenge, involving prolonged antibiotic therapy and revision surgery. This contributes to >1 billion USD in annual healthcare costs in the US alone. Exposure of metallic implants to alternating magnetic fields (AMF) generates heat …
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Finite Element and Probabilistic Analysis of Soft Tissue Structures of the Human Lumbar Spine
… evaluations, including design-phase screening of orthopedic implants.</p>
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Orienting structure to serve medical functions
… printed physical phantom and a hydrogel coated orthopedic implant were developed. The purpose of physical phantom work was to characterize and improve the ability of fused filament fabrication to create anthropomorphic physical phantoms for CT research. Specifically, we sought to develop the …
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Counteracting Neuroinvasive RNA Viruses: Antiviral and Immune Modulation Strategies Against SARS-CoV-2 and VEEV
… and successfully used in patients receiving orthopedic implants. Silicon nitride exhibited antimicrobial activity reducing the likelihood of post-surgical complications due to infection. Our overarching research goal is to test silicon nitride's antiviral activity for potential future …
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Corrosion modeling of magnesium-based medical implants
… materials in the field of medical implants. In this scope, magnesium and its alloys were widely investigated due to their superior biocompatibility. However, magnesium is a highly active metal and has a high corrosion rate in aqueous environments especially body fluids. Considerable …
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