8,938 results match your criteria magnetically recoverable


CORR Insights®: What Are the Potential Benefits and Risks of Using Magnetically Driven Antegrade Intramedullary Lengthening Nails for Femoral Lengthening to Treat Leg Length Discrepancy?

Clin Orthop Relat Res 2021 Dec 1. Epub 2021 Dec 1.

Professor, University of California, San Francisco (UCSF), Benioff Children's Hospital Oakland, Oakland, CA, USA.

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December 2021

Highly Efficient Magnetic Propulsion of NiFe Nanorod-Based Miniature Swimmers in Three Dimensions.

ACS Appl Mater Interfaces 2021 Dec 1. Epub 2021 Dec 1.

Hubei Engineering Research Center of Weak Magnetic-field Detection & College of Science, China Three Gorges University, Yichang, Hubei 443002, China.

Magnetically actuated miniature robots have attracted the attention of the scientific community over the past two decades, but the confined workspace of their manipulation system (typically a tri-axial coil or eight electromagnetic coils) and the low efficiency of propulsion have limited their utility. Here, we describe a highly efficient NiFe nanorod-based magnetic miniature swimmer that can be manipulated in 3D spaces using two pairs of coils placed in the - horizontal plane. In the new swimmer, the shape symmetry is broken along its body, and the asymmetry in magnetizations is introduced perpendicular to the long axis of its body simultaneously. Read More

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December 2021

Electromagnetohydrodynamic bioconvective flow of binary fluid containing nanoparticles and gyrotactic microorganisms through a stratified stretching sheet.

Sci Rep 2021 Nov 30;11(1):23159. Epub 2021 Nov 30.

Center of Excellence in Theoretical and Computational Science (TaCS-CoE), Faculty of Science, King Mongkut's University of Technology Thonburi (KMUTT), 126 Pracha Uthit Rd., Bang Mod, Thung Khru, Bangkok, 10140, Thailand.

Bioconvection has recently been the subject of dispute in a number of biotechnological fields that depend on fluids and their physical properties. When mixed nanofluids are subjected to heat and mass transmission, the process of bioconvection occurs. This attempt conveys the theoretical analysis of two-dimensional electrically conducting and magnetically susceptible binary fluid containing nanoparticles and gyrotactic microorganisms past a stratified stretching surface. Read More

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November 2021

Magnetically Directed Co-nanoinitiators for Cross-Linking Adhesives and Enhancing Mechanical Properties.

ACS Appl Mater Interfaces 2021 Nov 29. Epub 2021 Nov 29.

School of Materials Science and Engineering, Nanyang Technological University, 639798 Singapore.

Magnetically directed localized polymerization is of immense interest for its extensive impacts and applications in numerous fields. The use of means untethered from an external magnetic field to localize initiation of polymerization to develop a curing system is a novel concept, with a sustainable, efficient, and eco-friendly approach and a wide range of potential in both science and engineering. However, the conventional means for the initiation of polymerization cannot define the desirable location of polymerization, which is often exacerbated by the poor temporal control in the curing system. Read More

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November 2021

Effect of Fe/FeO Nanoparticles Stray Field on the Microwave Magnetoresistance of a CoFeB/Ta/CoFeB Synthetic Ferrimagnet.

ACS Sens 2021 Nov 29. Epub 2021 Nov 29.

Institut Jean Lamour, UMR 7198, Université de Lorraine, CNRS, 54601 Nancy, France.

The effect of the stray field of Fe/FeO nanoparticles on the angular dependence of the microwave absorption derivative in CoFeB/Ta/CoFeB synthetic ferrimagnetic structures and CoFeB films with perpendicular anisotropy is analyzed, and its application for sensor technology is proposed. The effective field of the "platform-particles" system controlled by the magnetic dipole interaction of the CoFeB-Fe/FeO system decreased to zero in areas where the platform was magnetostatically coupled with nanoparticles. Micromagnetic modeling demonstrated the distribution of magnetization and resistance in local areas of CoFeB/Ta/CoFeB structures under the nanoparticles. Read More

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November 2021

Magnetically Controllable Flowerlike, Polyhedral Ag-Cu-CoO for Surface-Enhanced Raman Scattering.

ACS Appl Mater Interfaces 2021 Nov 29. Epub 2021 Nov 29.

Department of Chemical and Biological Engineering, University at Buffalo (SUNY), Buffalo, New York 14260, United States.

Syntheses of Cu-, Ag-, and Ag-Cu-CoO nanomaterials are of interest for a wide range of applications including electrochemistry, thermal catalysis, energy storage, and electronics. However, CoO-based nanomaterials have not been explored for surface-enhanced Raman scattering (SERS). Here, we present Cu-, Ag-, and Ag-Cu-CoO nanomaterials of a hierarchical flower shape comprising two separate phases: a pure Cu or Ag core and multiple CoO branches, in which the optical properties of the core and the magnetic properties of the branches are integrated. Read More

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November 2021

Supramolecular Surface Functionalization of Iron Oxide Nanoparticles with α-Cyclodextrin-Based Cationic Star Polymer for Magnetically-Enhanced Gene Delivery.

Pharmaceutics 2021 Nov 6;13(11). Epub 2021 Nov 6.

Department of Materials Science and Engineering, National University of Singapore, 7 Engineering Drive 1, Singapore 117574, Singapore.

Supramolecular polymers formed through host-guest complexation have inspired many interesting developments of functional materials for biological and biomedical applications. Here, we report a novel design of a non-viral gene delivery system composed of a cationic star polymer forming supramolecular complexes with the surface oleyl groups of superparamagnetic iron oxide nanoparticles (SPIONs), for magnetically enhanced delivery of DNA into mammalian cells. The cationic star polymer was synthesized by grafting multiple oligoethylenimine (OEI) chains onto an α-cyclodextrin (α-CD) core. Read More

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November 2021

Dual Properties of Polyvinyl Alcohol-Based Magnetorheological Plastomer with Different Ratio of DMSO/Water.

Sensors (Basel) 2021 Nov 22;21(22). Epub 2021 Nov 22.

Engineering Materials and Structures (eMast) iKohza, Malaysian-Japan International Institute of Technology, Universiti Teknologi Malaysia, Jalan Sultan Yahya Petra, Kuala Lumpur 54100, Malaysia.

Polyvinyl alcohol (PVA)-based magnetorheological plastomer (MRP) possesses excellent magnetically dependent mechanical properties such as the magnetorheological effect (MR effect) when exposed to an external magnetic field. PVA-based MRP also shows a shear stiffening (ST) effect, which is very beneficial in fabricating pressure sensor. Thus, it can automatically respond to external stimuli such as shear force without the magnetic field. Read More

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November 2021

Preparation of Inoculum for Bacterial Cellulose Biosynthesis Using Magnetically Assisted External-Loop Airlift Bioreactor.

Polymers (Basel) 2021 Nov 15;13(22). Epub 2021 Nov 15.

Department of Microbiology and Biotechnology, Faculty of Biotechnology and Animal Husbandry, West Pomeranian University of Technology in Szczecin, Piastów Ave. 45, 70-311 Szczecin, Poland.

The aim of this study was to demonstrate the applicability of a novel magnetically assisted external-loop airlift bioreactor (EL-ALB), equipped with rotating magnetic field (RMF) generators for the preparation of inoculum during three-cycle repeated fed-batch cultures, further used for bacterial cellulose (BC) production. The fermentation carried out in the RMF-assisted EL-ALB allowed to obtain an inoculum of more than 200× higher cellular density compared to classical methods of inoculum preparation. The inoculum obtained in the RMF-assisted EL-ALB was characterized by a high and stable metabolic activity during repeated batch fermentation process. Read More

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November 2021

Multifunctional Electrospun Nanofibers Based on Biopolymer Blends and Magnetic Tubular Halloysite for Medical Applications.

Polymers (Basel) 2021 Nov 9;13(22). Epub 2021 Nov 9.

CEITEC-Central European Institute of Technology, Brno University of Technology, Purkyňova 123, 612 00 Brno, Czech Republic.

Tubular halloysite (HNT) is a naturally occurring aluminosilicate clay with a unique combination of natural availability, good biocompatibility, high mechanical strength, and functionality. This study explored the effects of magnetically responsive halloysite (MHNT) on the structure, morphology, chemical composition, and magnetic and mechanical properties of electrospun nanofibers based on polycaprolactone (PCL) and gelatine (Gel) blends. MHNT was prepared via a simple modification of HNT with a perchloric-acid-stabilized magnetic fluid-methanol mixture. Read More

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November 2021

A Magnetically Coupled Electromagnetic Energy Harvester with Low Operating Frequency for Human Body Kinetic Energy.

Micromachines (Basel) 2021 Oct 22;12(11). Epub 2021 Oct 22.

School of Mechanical Engineering, Shandong University of Technology, Zibo 255049, China.

In this paper, a magnetically coupled electromagnetic energy harvester (MCEEH) is proposed for harvesting human body kinetic energy. The proposed MCEEH mainly consists of a pair of spring-connected magnets, coils, and a free-moving magnet. Specifically, the interaction force between the magnets is repulsive. Read More

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October 2021

Green synthesis of magnetically recyclable [email protected] composites from spent batteries for visible light photocatalytic degradation of phenol.

Chemosphere 2022 Jan 11;287(Pt 2):132238. Epub 2021 Sep 11.

School of Petroleum and Environmental Engineering, Yan'an University, Yan'an, 716000, PR China.

Magnetic binary heterojunctions are a kind of promising photocatalysts due to their high catalytic activity and easy magnetic separation; however, their synthesis may involve high costs or secondary environmental impacts. In this work, the magnetically recyclable [email protected] ([email protected], x = 0.00-0. Read More

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January 2022

Magnetically Driven Tunable 3D Structured Fe O Vertical Array for High-Performance Solar Steam Generation.

Small 2021 Nov 25:e2105198. Epub 2021 Nov 25.

State Key Laboratory of New Textile Materials and Advanced Processing Technologies, Wuhan Textile University, Wuhan, 430073, P. R. China.

Structural design of the solar-absorbing layer has been considered as one of the most direct and effective approaches for improving the solar steam generation performance by maximizing the absorption of sunlight, but great challenges in manipulation simplification and structure controllability still remain. Herein, a polyester (PET) fabric covered with a vertically aligned 3D tower-like ferrosoferric oxide (Fe O ) array via a convenient magnetically driven spray-coating method is reported, and both the spatial density and height of the Fe O array are tunable upon spraying time. It shows an extremely high solar absorbance (98. Read More

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November 2021

Anisotropic, strong, self-adhesive and strain-sensitive hydrogels enabled by magnetically-oriented cellulose/polydopamine nanocomposites.

Carbohydr Polym 2022 Jan 23;276:118783. Epub 2021 Oct 23.

College of Energy, Xiamen University, Xiamen 361102, PR China. Electronic address:

Recently, great efforts have been devoted to developing conductive adhesive hydrogels to meet the needs of various applications. However, grand challenges remain in achieving anisotropic hydrogels simultaneously featuring multiple properties using natural polymers and renewable resources. Here, a cellulose-based conductive hydrogel with strong, ultrastretchable, and adhesive properties is prepared via a simple magnetic field-induced strategy. Read More

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January 2022

Enzyme Control Over Ferric Iron Magnetostructural Properties.

Angew Chem Int Ed Engl 2021 Nov 23. Epub 2021 Nov 23.

Massachusetts General Hospital and Harvard Medical School, Radiology, 149 Thirteenth Street, Suite 2301, 02129, Charlestown, UNITED STATES.

Fe 3+ complexes in aqueous solution can exist as discrete mononuclear species or multinuclear magnetically coupled species. Stimuli-driven change to Fe 3+ speciation represents a powerful mechanistic basis for magnetic resonance sensor technology, but ligand design strategies to exert precision control of aqueous Fe 3+ magnetostructural properties are entirely underexplored. In pursuit of this objective, we rationally designed a ligand to strongly favor a dinuclear µ-oxo-bridged and antiferromagnetically coupled complex, but which undergoes carboxylesterase mediated transformation to a mononuclear high-spin Fe 3+ chelate resulting in substantial T 1 -relaxivity increase. Read More

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November 2021

From ( = 1) Spin Hexamer to Spin Tetradecamer by CuO Interstitials in ACuO(CuO)(SO) (A = alkali).

Inorg Chem 2021 Nov 23. Epub 2021 Nov 23.

Unité de Catalyse et Chimie du Solide (UCCS), UMR 8181, Université Lille 1, 59655 Villeneuve d'ASCQ, France.

(Na,K)CuO(SO) compounds form structural chains of Cu hexameric units with nominal = 1 spins due to the interplay between inner strong antiferromagnetic and ferromagnetic exchanges. We show here that the lattice relaxation after the replacement of alkali by larger Rb and Cs ones is accompanied by the insertion of neutral CuO species into (Rb,Cs)CuO(CuO)(SO) phases. Structurally, interstitial CuO links the next two Cu units in longer Cu tetradecameric ones. Read More

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November 2021

Magnetic field compensation coil design for magnetoencephalography.

Sci Rep 2021 Nov 22;11(1):22650. Epub 2021 Nov 22.

Max Planck Institute for Human Cognitive and Brain Sciences, Leipzig, Germany.

While optically pumped magnetometers (OPMs) can be attached to the head of a person and allow for highly sensitive recordings of the human magnetoencephalogram (MEG), they are mostly limited to an operational range of approximately 5 nT. Consequently, even inside a magnetically shielded room (MSR), movements in the remnant magnetic field disable the OPMs. Active suppression of the remnant field utilizing compensation coils is therefore essential. Read More

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November 2021

Bioinspired Brain Vasculature Model for Nanomedicine Testing Based on Decellularized Spinach Leaves.

Nano Lett 2021 Nov 22. Epub 2021 Nov 22.

SCAMT Institute, ITMO University, Saint Petersburg 191002, Russian Federation.

Animal testing is often criticized due to ethical issues and complicated translation of the results obtained to the clinical stage of drug development. Existing alternative models for nanopharmaceutical testing still have many limitations and do not significantly decrease the number of animals used. We propose a simple, bioinspired model for nanopharmaceutical drug testing based on the decellularized spinach leaf's vasculature. Read More

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November 2021

Developments, focuses, and trends in early-onset scoliosis from 2005 to 2020: A systematic bibliometric analysis.

World Neurosurg 2021 Nov 16. Epub 2021 Nov 16.

Department of Orthopedic Surgery, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China.

Objective: Although several studies have been published on early-onset scoliosis (EOS), bibliometric analysis is still lacking. The systematic bibliometric analysis enables researchers to understand the scope of research topics, identify research focuses and key literature, and predict future research directions.

Methods: Literature data were retrieved from the Web of Science Core Collection database. Read More

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November 2021

FeCoZnO/CuCr-LDH as a visible-light-responsive photocatalyst for the degradation of caffeine, bisphenol A, and simazine in pure water and real wastewater under photo-Fenton-like degradation process.

Chemosphere 2021 Nov 17:132920. Epub 2021 Nov 17.

Université Clermont Auvergne, CNRS, SIGMA Clermont, Institut de Chimie de Clermont-Ferrand, F-63000, Clermont-Ferrand, France.

This paper outlines the synthesis and application of a sustainable composite for the photo-Fenton-like degradation of caffeine, bisphenol A, and simazine. The phase, morphology, optical and magnetic properties of the samples were evaluated by different characterization techniques. The composite of FeCoZnO and copper-chromium layered double hydroxide (CuCr-LDH) was determined to be the most favorable photocatalyst in the photo-Fenton-like process when compared with FeO, FeCoZnO, CuCr-LDH, and FeO/CuCr-LDH composite. Read More

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November 2021

Dual-Targeted Nanoplatform Regulating the Bone Immune Microenvironment Enhances Fracture Healing.

ACS Appl Mater Interfaces 2021 Nov 19. Epub 2021 Nov 19.

Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China.

The immune system and skeletal system are closely linked. Macrophages are one of the most important immune cells for bone remodeling, playing a prohealing role mainly through M2 phenotype polarization. Baicalein (5,6,7-trihydroxyflavone, BCL) has been well documented to have a noticeable promotion effect on M2 macrophage polarization. Read More

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November 2021

Magnetically induced self-assembly DNAzyme electrochemical biosensor based on gold-modified α-FeO/FeOheterogeneous nanoparticles for sensitive detection of Ni.

Nanotechnology 2021 Nov 18. Epub 2021 Nov 18.

Jiangsu University, School of Pharmacy, Jiangsu University, Zhenjiang 212013, P.R. China, Zhenjiang, 212013, CHINA.

A magnetically induced self-assembly DNAzyme electrochemical biosensor based on gold-modified α-FeO/FeOheterogeneous nanoparticles was successfully fabricated to detect Nickel(II) (Ni). The phase composition and magnetic properties of α-FeO/FeOheterogeneous nanoparticles controllably prepared by the citric acid (CA) sol-gel method were investigated in detail. The α-FeO/FeOheterogeneous nanoparticles were modified by using trisodium citrate as reducing agent, and the magnetically induced self-assembly α-FeO/FeO-Au nanocomposites were obtained. Read More

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November 2021

Structural, optical and photocatalytic properties of magnetic recoverable [email protected] heterojunction prepared from waste Mn-Zn batteries.

J Environ Manage 2021 Nov 15;302(Pt B):114120. Epub 2021 Nov 15.

School of Petroleum and Environmental Engineering, Yan'an University, Yan'an, 716000, PR China.

Green, simple and high value-adding technology is crucial for realizing waste batteries recycling. In this work, the magnetically recyclable [email protected] ([email protected]) heterojunctions are prepared from waste Mn-Zn batteries via a green bioleaching and sample co-precipitation method. The as-prepared catalysts with different ZnMnO weight percentage (25%, 50% and 75%) have been comprehensively characterized in structure, optics, photoelectrochemistry and photocatalytic activity. Read More

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November 2021

Removal of phosphate from water by paper mill sludge biochar.

Environ Pollut 2021 Nov 15;293:118521. Epub 2021 Nov 15.

Korea Biochar Research Center, APRU Sustainable Waste Management Program & Division of Environmental Science and Ecological Engineering, Korea University, Seoul, Republic of Korea. Electronic address:

Biochar modification by metals and metal oxides is considered a practical approach for enhancing the adsorption capacity of anionic compounds such as phosphate (P). This study obtained paper mill sludge (PMS) biochar (PMSB) via a one-step process by pyrolyzing PMS waste containing ferric salt to remove anionic P from water. The ferric salt in the sludge was transformed into ferric oxide and zero-valent-iron (Fe) in N atmosphere at pyrolysis temperatures ranging from 300 to 800 °C. Read More

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November 2021

Magnetic field-switchable Laser Via Optical Pumping of Rubrene.

Adv Mater 2021 Nov 18:e2103870. Epub 2021 Nov 18.

Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts, 02139, United States.

Volumetric optical imaging of magnetic fields is challenging with existing magneto-optical materials, motivating the search for dyes with strong magnetic field interactions, distinct emission spectra, and an ability to withstand high photon flux and incorporation within samples. Here, the magnetic field effect on singlet exciton fission is exploited to demonstrate spatial imaging of magnetic fields in a thin film of rubrene. Doping rubrene with the high-quantum yield dye dibenzotetraphenylperiflanthene (DBP) is shown to enable optically-pumped, slab waveguide lasing. Read More

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November 2021

HeartMate 3: new challenges in ventricular tachycardia ablation.

Europace 2021 Nov 17. Epub 2021 Nov 17.

Davidai Arrhythmia Center, Sheba Medical Center, Ramat Gan, Israel.

Aim: To describe clinical characteristics, procedural details, specific challenges, and outcomes in patients with HeartMate3™ (HM3), a left ventricular assist device system with a magnetically levitated pump, undergoing ventricular tachycardia ablation (VTA).

Methods And Results: Data were collected from patients with an HM3 system who underwent VTA in seven tertiary centres. Data included baseline patient characteristics, procedural data, mortality, and arrhythmia-free survival. Read More

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November 2021

Magnetic composite of γ-FeO hollow sphere and palladium doped nitrogen-rich mesoporous carbon as a recoverable catalyst for C-C coupling reactions.

Sci Rep 2021 Nov 17;11(1):22409. Epub 2021 Nov 17.

Department of Chemistry, School of Physics and Chemistry, Alzahra University, PO Box 1993891176, Vanak, Tehran, Iran.

In this article, palladated-magnetic nitrogen doped porous carbon was prepared from nano magnetic γ-FeO hollow sphere (h-FeO) with high specific surface area and pore volume. To the purpose, initially h-FeO was prepared and covered with glucose via hydrothermal treatment with subsequent polymerization of organic shell. The polymerization of melamine-resorcinol-formaldehyde (MRF) was achieved in the presence of Cl-functionalized glucose coated h-FeO ([email protected]). Read More

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November 2021

Exploring the nonextensive thermodynamics of partially ionized gas in magnetic field.

Phys Rev E 2021 Oct;104(4-2):045202

Department of Nuclear Engineering, Seoul National University, Seoul 08826, Republic of Korea.

Contrary to classical thermodynamics, which deals with systems in thermal equilibrium, partially ionized gases generally do not reach thermal equilibrium. Nonextensive statistical mechanics has helped extend classical thermodynamics to nonequilibrium ionized gas. However, the fundamental question on whether the statistics of non-Maxwellian electrons satisfy the laws of thermodynamics has not been resolved. Read More

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October 2021

A review on sensing and catalytic activity of nano-catalyst for synthesis of one-step ammonia and urea: Challenges and perspectives.

Chemosphere 2021 Nov 13:132806. Epub 2021 Nov 13.

Department of Chemical and Environmental Engineering, Faculty Science and Engineering, University of Nottingham, Malaysia, Semenyih, 43500, Selangor Darul Ehsan, Malaysia. Electronic address:

One of the most significant chemical operations in the past century was the Haber-Bosch catalytic synthesis of ammonia, a fertilizer vital to human life. Many catalysts are developed for effective route of ammonia synthesis. The major challenges are to reduce temperature and pressure of process and to improve conversion of reactants produce green ammonia. Read More

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November 2021

What Are the Potential Benefits and Risks of Using Magnetically Driven Antegrade Intramedullary Lengthening Nails for Femoral Lengthening to Treat Leg Length Discrepancy?

Clin Orthop Relat Res 2021 Nov 16. Epub 2021 Nov 16.

Pediatric Orthopaedics, Deformity Reconstruction and Foot Surgery, University Hospital Muenster, Muenster, Germany.

Background: Limb lengthening with magnetically driven intramedullary lengthening nails is a fast-developing field and represents an alternative to external fixators. Although previous studies have assessed the application of magnetically driven intramedullary lengthening nails, these studies have been heterogenous regarding the nailing approach, the bone treated, and the implant type; they also have analyzed relatively small patient groups at short follow-up durations.

Questions/purposes: (1) Is femoral lengthening with magnetically driven antegrade intramedullary lengthening nails accurate and precise? (2) What are the most common complications of treatment? (3) What factors are associated with unplanned additional surgery?

Methods: We retrospectively analyzed the longitudinally maintained database of our orthopaedic teaching hospital to identify all patients who underwent surgery for leg length discrepancy (LLD) between October 2014 and April 2019. Read More

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November 2021