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Biomechanical assessment of zygomatic implants in clinical rehabilitation scenarios: A finite element and fatigue analysis

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Dental materials 2025年第6期41卷 679-689页

作者： Alberto, Laura H.J. Griggs, Jason A. Roach, Michael D. Williamson, Randall S. Chandran, Ravi Priddy, Matthew W. Lu, Yuefeng J. Bergin, Patrick F. Duan, Yuanyuan Department of Biomedical Materials Science University of Mississippi Medical Center JacksonMS39216 United States Department of Surgery Emory University School of Medicine AtlantaGA30322 United States Department of Mechanical Engineering Mississippi State University StarkvilleMS39762 United States Department of Advanced Biomedical Education University of Mississippi Medical Center JacksonMS39216 United States Department of Orthopaedic Surgery and Rehabilitation University of Mississippi Medical Center JacksonMS39216 United States

Objectives: This study utilizes contemporary placement approaches and implant design to investigate zygomatic implants' biomechanical behavior and fatigue lifetime in clinical contexts. Methods: A commercially available zygomatic implant assembly and an ex vivo skull were subjected to computed tomography. Three-dimensional models representing intra-sinus, extra-sinus, and extramaxillary configurations were constructed. The finite element analysis (FEA) was executed with vertical, lateral, and masseteric loads applied simultaneously. Von Mises stress served as the failure criterion, with data collection on implant fixtures, abutments, connector screws, and simulated bone structures. The analysis included peak stress locations, contour plots illustrating stress distribution, and fatigue limit assessments for implant components. Results: Results revealed lower stress concentrations in mesial implant components compared to distal ones. The extra-sinus approach showed lower stresses in most prosthetic components. Peak stress concentrations in the maxillary bone layers (ranging from 25 to 27 MPa) were primarily localized at the alveolar ridge's crest at the zygomatic implant entrance point. On the zygomatic bone, the peak stresses were in the interface with the distal implant and ranged from 12 to 26 MPa. The in silico fatigue testing demonstrated an equally high fatigue lifetime of the implant components in all the approaches analyzed. Significance: Because of additional clinical advantages, the extra-sinus approach was considered the optimal reconstruction method when patients' anatomy permits its application. Given the limited long-term clinical data on the latest implant designs and placement techniques, these findings provide valuable insights into the biomechanical performance of zygomatic implants and offer guidance for clinical practice. © 2025

关键词： Fatigue testing

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Hydrophobic long-chain two-dimensional perovskite scintillators for underwater X-ray imaging

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Rare Metals 2024年第1期43卷 175-185页

作者： Jin-Xiao Zheng Zi-An Zhou Tiao Feng Hui Li Cheng-Hua Sun NüWang Yang Tian Yong Zhao Shu-Yun Zhou Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China Laboratory of Bioinspired Smart Interfacial Science and Technology of the Ministry of Education Beijing Key Laboratory of Bioinspired Energy Materials and DevicesSchool of ChemistryBeijing Advanced Innovation Center for Biomedical EngineeringBeihang UniversityBeijing 100191China Department of Engineering Physics Tsinghua University and Key Laboratory of Particle and Radiation Imaging Ministry of EducationTsinghua UniversityBeijing 100084China e-mail:yangt@***

The underwater X-ray imaging technology development is significant to subaqueous target reconnaissance/detection/identification, subfluvial archaeology,submerged resource exploration, etc. As the core of X-ray imaging detection, the scintillator has been plagued by inherent moisture absorption and decomposition, and strict requirements for seamless packaging and ***, we designed a manganese-doped two-dimensional(2D) perovskite scintillator modified by hydrophobic longchain organic amine through the combination of component and doping engineering. The modified perovskites show high water repellency that can be used as an underwater X-ray scintillator. X-ray images of aquatic organisms or other objects with a high spatial resolution of10 lp·mm^(-1) at a big view field(32 mm × 32 mm) were obtained by scintillation screen. This hydrophobic perovskite scintillator based on molecular design is of great promise in underwater X-ray nondestructive testing technology development.

关键词： Two-dimensional perovskite Hydrophobic Scintillators Underwater X-ray imaging Underwater nondestructive testing technology

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Performance analysis of an Injera baking machine by using solar energy

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materials Today: Proceedings 2022年 56卷 3285-3293页

作者： Suresh, P. Ali, M.D. Irfan Rao, P. Govind Rudrapati, Ramesh Mechanical Engineering Department Bharat Institute of Engineering and Technology Mangalpally Telangana Sagar road Ibrahimpatnam RR Dist India Thermal & Aerospace Program School of Mechanical Chemical and Materials Engineering Adama Science and Technology Ethiopia Mechanical Engineering Department Avanthi Research and Technology Bhogapuram India School of Mechanical Industrial Engineering Bulehora University Bulehora Ethiopia

The majority of Ethiopia's population, primarily women, is susceptible to smoke inhalation during cooking, and they spend the majority of their time striving to collect firewood. Biomass deforestation for cooking harms the rural household economy and contributes to national and global environmental change, such as pollution and health issues. The effort should aim to integrate the Scheffler concentrator with a thermal storage system via the secondary solar cooking reflector in order to stimulate indoor cooking while avoiding concerns associated by carbon inhalation and deforestation. As a result, the Injera bakery system powered by solar thermal energy is born. There is a primary (Scheffler), secondary (reflective), and thermal storage device incorporated, as well as a cooking (pan) mounts. Solid works software was utilized for Scheffler focus and secondary reflector modeling and simulation. The thermal retention capacity of a storage device is determined using heating and cooling curves generated by software modeling and simulation. The findings gained would aid in the development of any comfortable indoor cooking system specifically for rural areas without a grid connection, and as a result of this study, carbon inhalation and deforestation difficulties would be mitigated. Through automation, the output rate would also increase the amount and efficiency of injera. This analysis focuses on the Injera baker concept for domestic applications. © 2021

关键词： Solar energy

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Gelatin methacryloyl granular scaffolds for localized mRNA delivery

Aggregate

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Aggregate 2024年第2期5卷 386-400页

作者： Bruna Gregatti Carvalho Aya Nakayama Hiromi Miwa SangWon Han Lucimara Gaziola de la Torre Dino Di Carlo Junmin Lee Han-Jun Kim Ali Khademhosseini Natan Roberto de Barros Terasaki Institute for Biomedical Innovation(TIBI) Los AngelesCaliforniaUSA Department of Materials and Bioprocess Engineering School of Chemical EngineeringUniversity of Campinas(UNICAMP)CampinasBrazil Department of Bioengineering University of California at Los Angeles(UCLA)Los AngelesCaliforniaUSA Department of Biophysics Paulista School of MedicineFederal University of São Paulo(UNIFESP)CampinasBrazil Department of Materials Science and Engineering Pohang University of Science and Technology(POSTECH)PohangRepublic of Korea Institute for Convergence Research and Education in Advanced Technology Yonsei UniversityIncheonRepublic of Korea College of Pharmacy Korea UniversityPohangRepublic of Korea Centre for Biomaterials Cellular and Molecular Theranostics(CBCMT)Vellore Institute of Technology(VIT)VelloreIndia

Messenger RNA(mRNA)therapy is the intracellular delivery of mRNA to produce desired therapeutic *** strategies for local mRNA delivery is still required where direct intra-articular injections are inappropriate for targeting a specific *** mRNA delivery efficiency depends on protecting nucleic acids against nuclease-mediated degradation and safe site-specific intracellular ***,novel mRNA-releasing matrices based on RGD-moiety-rich gelatin methacryloyl(GelMA)microporous annealed particle(MAP)scaffolds are *** concentration in aerogel-based microgels(μgels)produced through a microfluidic process,MAP stiffnesses,and microporosity are crucial parameters for cell adhesion,spreading,and *** being loaded with mRNA complexes,MAP scaffolds composed of 10%GelMAμgels display excellent cell viability with increasing cell infiltration,adhesion,proliferation,and gene *** intracellular delivery is achieved by the sustained release of mRNA complexes from MAP scaffolds and cell adhesion on mRNA-releasing *** findings highlight that hybrid systems can achieve efficient protein expression by delivering mRNA complexes,making them promising mRNA-releasing biomaterials for tissue engineering.

关键词： GelMA lipid-based nanocarriers MAP scaffolds microfluidics mRNA

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Construction of ultra-stable NiFe armored catalyst for liquid and flexible quasi-solid-state rechargeable Zn-air batteries

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Nano Research 2023年第4期16卷 4980-4986页

作者： Hanqin Sun Meiqi Zhao Chao Ma Wen Chen Yong Yang Yunhu Han Frontiers Science Center for Flexible Electronics Xi’an Institute of Flexible Electronics(IFE)and Xi’an Institute of Biomedical Materials&EngineeringNorthwestern Polytechnical UniversityXi'an 710072China Department of Chemistry Tsinghua UniversityBeijing 100084China School of Materials Science and Engineering Northwestern Polytechnical UniversityXi'an 710072China State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China Key Laboratory for Organic Electronics and Information Displays&Institute of Advanced Materials(IAM) Nanjing University of Posts and TelecommunicationsNanjing 210023China

The commercial application of non-precious metal-based electrocatalysts is not only limited by the intrinsic activity of the catalysts,but also the stability of the catalysts is extremely ***,we fabricated an ultra-stable NiFe armored catalyst(Ar-NiFe/NC)by a simple secondary pyrolysis *** as-obtained Ar-NiFe/NC electrocatalyst exhibits an excellent bifunctional oxygen electrocatalytic performance with an activity indicatorΔE of 0.74 V *** hydrogen electrode(RHE).More importantly,the Ar-NiFe/NC electrocatalyst also shows a remarkable operational and storage *** accelerated durability test(ADT)cycles,no obvious degradation of oxygen electrocatalytic performance could be *** addition,the Ar-NiFe/NC electrocatalyst still exhibits an unbated oxygen electrocatalytic performance comparable to fresh catalysts after three months of air-exposed *** assembled liquid and flexible quasi-solid-state rechargeable Zn-air batteries with the Ar-NiFe/NC electrocatalyst exhibit impressive *** liquid rechargeable Zn-air batteries possess a high open-circuit voltage(OCV)of 1.43 V and a salient peak power density of 146.40 mW·cm^(−2),while the flexible quasi-solid-state rechargeable Zn-air batteries also exhibit an excellent OCV of 1.60 V and an exciting peak power density of 41.99 mW·cm^(−2).

关键词： bifunctional oxygen electrocatalyst outstanding durability liquid Zn-air batteries flexible quasi-solid-state Zn-air batteries

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Van der Waals device integration beyond the limits of van der Waals forces using adhesive matrix transfer

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Nature Electronics 2024年第1期7卷 17-28页

作者： Satterthwaite, Peter F. Zhu, Weikun Jastrzebska-Perfect, Patricia Tang, Melbourne Spector, Sarah O. Gao, Hongze Kitadai, Hikari Lu, Ang-Yu Tan, Qishuo Tang, Shin-Yi Chueh, Yu-Lun Kuo, Chia-Nung Lue, Chin Shan Kong, Jing Ling, Xi Niroui, Farnaz Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology CambridgeMA United States Research Laboratory of Electronics Massachusetts Institute of Technology CambridgeMA United States Department of Chemical Engineering Massachusetts Institute of Technology CambridgeMA United States Department of Physics Massachusetts Institute of Technology CambridgeMA United States Department of Chemistry Boston University BostonMA United States Department of Materials Science and Engineering National Tsing Hua University Hsinchu Taiwan Semiconductor Research Center Hon Hai Research Institute Taipei Taiwan College of Semiconductor Research National Tsing Hua University Hsinchu Taiwan Department of Physics National Cheng Kung University Tainan Taiwan Taiwan Consortium of Emergent Crystalline Materials National Science and Technology Council Taipei Taiwan Program on Key Materials Academy of Innovative Semiconductor and Sustainable Manufacturing National Cheng Kung University Tainan Taiwan Division of Materials Science and Engineering Boston University BostonMA United States The Photonics Center Boston University BostonMA United States

Pristine van der Waals (vdW) heterostructures formed between two-dimensional (2D) and other materials can be used to create optical and electronic devices. However, the weak vdW forces alone do not allow direct physical stacking of arbitrary layers. As a result, vdW heterostructure fabrication typically requires solvents, sacrificial layers or high temperatures, which can introduce damage and contaminants. Here, we show that adhesive matrix transfer can eliminate these limitations and can provide vdW integration beyond the limits of vdW forces. In the approach, a hybrid high- and low-adhesion surface is used to decouple the forces driving the transfer from the vdW forces defining the heterostructure of interest. We show that the technique can be used to achieve direct vdW integration of diverse 2D materials (MoS2, WSe2, PtS2 and GaS) with dielectrics (SiO2 and Al2O3), which is conventionally forbidden but critical for active devices and scalable, aligned heterostructure formation. The approach also allows single-step 2D material-to-device integration, which we illustrate by fabricating arrays of monolayer MoS2 transistors. As any exposure to solvents or polymers is avoided, the interfaces and surfaces remain pristine. Thus, intrinsic 2D material properties can be probed without the influence of processing steps. The materials can be further engineered through surface treatments and used to fabricate unconventional device form factors. © 2023, The Author(s), under exclusive licence to Springer Nature Limited.

关键词： Van der Waals forces

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Magnetic Microrobots Fabricated by Photopolymerization and Assembly

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Cyborg and Bionic Systems 2023年第1期4卷 41-46页

作者： Xiyue Liang Yue Zhao Dan Liu Yan Deng Tatsuo Arai Masaru Kojima Xiaoming Liu Key Laboratory of Biomimetic Robots and Systems Ministry of EducationState Key Laboratory of Intelligent Control and Decision of Complex SystemBeijing Advanced Innovation Center for Intelligent Robots and Systemsand School of Mechatronical EngineeringBeijing Institute of TechnologyBeijing 100081China Center for Neuroscience and Biomedical Engineering The University of Electro-CommunicationsTokyo 182-8585Japan Department of Materials Engineering Science Osaka UniversityOsaka 560-8531Japan

Magnetic soft microrobots have great potential to access narrow spaces and conduct multiple tasks in the biomedical *** now,drug delivery,microsurgery,disease diagnosis,and dredging the blocked blood vessel have been realized by magnetic soft microrobots in vivo or in ***,as the tasks become more and more complex,more functional units have been embedded in the body of the developed magnetic *** magnetic soft microrobots with complex designed geometries,mechanisms,and magnetic orientation are now greatly challenging the fabrication of the magnetic *** this paper,we propose a new method combining photopolymerization and assembly for the fabrication of magnetic soft *** the micro-hand assembly system,magnetic modules with different shapes and materials are firstly arrayed with precise position and orientation ***,the developed photopolymerization system is employed to fix and link these modules with soft *** on the proposed fabrication method,3 kinds of soft magnetic microrobots were fabricated,and the fundamental locomotion was *** believe that the presented fabrication strategy could help accelerate the clinical application of magnetic microrobots.

关键词： Magnetic system precise

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Design of the Continuous Gravity-Driven Multiple-Effect Thermal System (G-METS) for Efficient Low-Cost Magnesium Recycling

Design of the Continuous Gravity-Driven Multiple-Effect Ther...

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Magnesium Technology Symposium held during the 152nd TMS Annual Meeting and Exhibition, TMS 2023

作者： Sehar, Daniel Mcarthur Espinosa, Gabriel Telgerafchi, Armaghan Ehsani Chinwego, Chinenye Lynch, Keira Perrin, Benjamin Powell, Adam Materials Science and Engineering Program Department of Mechanical Engineering Worcester Polytechnic Institute WorcesterMA United States Department of Mechanical Engineering Worcester Polytechnic Institute WorcesterMA United States 100 Institute Rd WorcesterMA01609 United States

ISBN: (纸本)9783031226458

Recent global supply shortages, combined with need for light-weight structural components for efficient transportation, have led to very high prices for magnesium due to its low density and high part stiffness/weight. This study continues prior work on magnesium recycling using multiple-effect distillation with gravity as the parameter to create the pressure difference between effects, called G-METS. The long-term vision is for continuous distillation, but experiments to date have only used batch distillers with maximum rate of 1 kg/h. and minimum energy consumption of 2 kWh/kg. This study presents the design of laboratory-scale continuous distiller including a custom-made furnace to sustain a high-power density and temperature gradient for rapid boiling and efficient recovery of magnesium. © The Minerals, Metals & materials Society 2023.

关键词： Distillation

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Electronic exoneuron based on liquid metal for the quantitative sensing of the augmented somatosensory system

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Microsystems & Nanoengineering 2023年第5期9卷 113-125页

作者： Jin Shang Lixue Tang Kaiqi Guo Shuaijian Yang Jinhao Cheng Jiabin Dou Rong Yang Mingming Zhang Xingyu Jiang Shenzhen Key Laboratory of Smart Healthcare Engineering Guangdong Provincial Key Laboratory of Advanced BiomaterialsDepartment of Biomedical EngineeringSouthern University of Science and TechnologyNo.1088Xueyuan Rd.Nanshan DistrictShenzhenGuangdong 518055P.R.China CAS Center for Excellence in Nanoscience Center of Materials Science and Optoelectronics EngineeringNational Center for Nanoscience and TechnologyUniversity of Chinese Academy of SciencesBeijing 100190P.R.China Sino-Danish Center for Education and Research Sino-Danish CollegeUniversity of Chinese Academy of SciencesBeijing 100190P.R.China School of Biomedical Engineering Capital Medical UniversityNo.10 XitoutiaoYou An Men WaiBeijing 100069China School of Biomedical Sciences Faculty of Biological SciencesUniversity of LeedsLeeds LS29JTUK

The increasing demands in augmented somatosensory have promoted quantitative sensing to be an emerging need for athletic training/performance evaluation and physical *** for the somatosensory system in the human body can capture the information of movements in time but only *** work presents an electronic Exo-neuron(EEN)that can spread throughout the limbs for realizing augmented somatosensory by recording both muscular activity and joint motion quantitatively without site constraints or drift instability,even in strenuous *** based on low-cost liquid metal and clinically used adhesive elastomer,the EEN could be easily fabricated in large areas for *** is thin(~120μm),soft,stretchable(>500%),and conformal and further shows wide applications in sports,rehabilitation,health care,and entertainment.

关键词： system recording liquid

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Low-temperature spin Seebeck effect in nonmagnetic vanadium dioxide

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Physical Review B 2024年第2期110卷 024415-024415页

作者： Renjie Luo Tanner J. Legvold Liyang Chen Henry Navarro Ali C. Basaran Deshun Hong Changjiang Liu Anand Bhattacharya Ivan K. Schuller Douglas Natelson Department of Physics and Astronomy Applied Physics Graduate Program Rice Quantum Institute Department of Physics and Center for Advanced Nanoscience Materials Science Division Department of Electrical and Computer Engineering Department of Materials Science and NanoEngineering

The spin Seebeck effect (SSE) is sensitive to thermally driven magnetic excitations in magnetic insulators. Vanadium dioxide in its insulating low-temperature phase is expected to lack magnetic degrees of freedom, as vanadium atoms are thought to form singlets upon dimerization of the vanadium chains. Instead, we find a paramagnetic SSE response in VO2 films that grows as the temperature decreases below 50 K. The field and temperature-dependent SSE voltage is qualitatively consistent with a general model of paramagnetic SSE response and inconsistent with triplet spin transport. Quantitative estimates find a spin Seebeck coefficient comparable in magnitude to that observed in strongly magnetic materials. The microscopic nature of the magnetic excitations in VO2 requires further examination.

关键词： Spin Seebeck effect Paramagnets Strongly correlated systems

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