Article
Biology
Chenhao Yu, Joel Martin Sacris, Yan Gai, Chi Hou Lei
Summary: This study presents a realistic three-dimensional model that accurately captures the deformation and stress distribution of sitting on an air-cell-based cushion. It resolves several shortcomings in previous models and allows for optimization of cushion design and operating conditions.
COMPUTERS IN BIOLOGY AND MEDICINE
(2022)
Article
Health Care Sciences & Services
Chunfu Lu, Zeyi Chen, Yu Li, Xiaoyun Fu, Yuxiao Tang
Summary: The objective of this study was to obtain the ideal pressure distribution model for buttock and thigh support in forward-leaning and upright sitting postures of office workers. The support provided by mesh materials was reproduced using elastic materials, and an effective seat design scheme was proposed to improve comfort. Through pressure distribution experiments and the fuzzy clustering algorithm, ideal body pressure distribution matrices were generated for two common sitting postures. A prototype chair was created and validated. The four-zone ideal support model effectively represents buttock and thigh support requirements and is useful for product development. Studying sitting postures and pressure values helps refine the needs of office personnel and provides new design ideas for office chairs.
Article
Dermatology
Colin J. Boyle, Claire A. Higgins
Summary: This study presents a novel strategy to enhance skin's tolerance to load by autologous transplantation of plantar fibroblasts into the residual limb dermis, reducing mechanically induced injuries. Reprogramming skin to a plantar-like phenotype could potentially halve pressure ulcer injuries.
EXPERIMENTAL DERMATOLOGY
(2021)
Article
Biotechnology & Applied Microbiology
Jiayi Bao, Qianxiang Zhou, Xingwei Wang, Chao Yin
Summary: The study found that compared to fast-recovery foam, slow-recovery foam cushions have lower contact pressure and more uniform pressure distribution; cushions that are too soft or too hard reduce sitting comfort; the N3 cushion provides the highest comfort for pilots.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2021)
Article
Chemistry, Analytical
Jawad Ahmad, Johan Siden, Henrik Andersson
Summary: This paper presents a posture recognition system for wheelchair users to detect irregular sitting postures and prevent health issues. The system achieves a posture classification accuracy of up to 99.03% using various machine learning algorithms. It provides real-time pressure distribution maps and allows sharing of data with healthcare professionals.
Review
Rehabilitation
Chen He, Ping Shi
Summary: This review compares different types of wheelchair cushions in terms of their effect on reducing interface pressure in individuals with spinal cord injury. The results show that air cushions consistently perform better in interface pressure reduction compared to gel and foam cushions, although variable parameters and individual conditions may interfere with the comparison.
DISABILITY AND REHABILITATION
(2022)
Article
Green & Sustainable Science & Technology
Yuxiang Yu, Jipeng Zheng, Huawei Pu, Chanan Zhu, Qun Wu
Summary: Waste bamboo fibers, which are mostly in a spiral coil state and exhibit elasticity, have the potential to be used as elastic cushion filler. However, there is limited research on their application in elastic cushions. In this study, a bamboo-based elastic cushion (BEC) was prepared and evaluated to efficiently utilize waste bamboo fibers.
Article
Biology
Hadar Shaulian, Amit Gefen, Deborah Solomonow-Avnon, Alon Wolf
Summary: This study developed a novel method to analyze the mechanical loading on the human heel under different offloading footwear configurations, identifying two effective combinations of offloading parameters. The method has the potential to optimize the development of offloading solutions and revolutionize prevention and treatment of diabetic ulcers.
COMPUTERS IN BIOLOGY AND MEDICINE
(2021)
Article
Chemistry, Analytical
Qinghui Meng, Lianhuan Han, Hantao Xu, Xiaoting Lin, Jie Zhang, Yunfeng Peng, Jian-Jia Su, Dongping Zhan
Summary: Electrochemical nanoimprint lithography (ECNL) is a promising manufacturing technology for creating three-dimensional micro/nano-structures directly on semiconductors. The contact pressure and its uniformity between the metallized mold and semiconductor workpiece are crucial for product quality. Through experiments and theoretical analyses, it was found that optimizing the pressure improves efficiency and accuracy, while excessive pressure causes mold distortion and defects. A dual-cushion omnidirectional structure was designed to improve imprint uniformity in large areas. Finite element simulations matched experimental results, providing instructive guidance for optimizing ECNL technical parameters.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Ergonomics
Alexandros Leledakis, Jonas Osth, Johan Davidsson, Lotta Jakobsson
Summary: This study investigates the effects of different postures of passengers in the front seat of a car during intersection crashes, finding that changes to lower extremity postures have the greatest influence on overall responses. In various crash configurations, posture variations significantly affect torso and head kinematics, with certain postures leading to increased pelvis excursions and rotations, ultimately impacting overall body response.
ACCIDENT ANALYSIS AND PREVENTION
(2021)
Article
Dermatology
J. G. M. V. Van Asten, M. -t. Fung, C. W. J. Oomens, D. L. Bader, P. R. Worsley
Summary: This study used an experimental-computational approach to analyze support surface microclimate control systems and evaluate the performance of two specific support surface systems. The experiment showed that support surfaces with active airflow were more effective in improving local humidity levels compared to those without airflow. The computational model produced comparable results with the experiment data, demonstrating the potential of this approach in evaluating different mattress design principles for pressure ulcer prevention.
JOURNAL OF TISSUE VIABILITY
(2021)
Article
Dermatology
Aleksei Orlov, Amit Gefen
Summary: There are two design concepts for single-use negative pressure wound therapy systems: canister-based and canisterless. The canister-based technology provides stable delivery of negative pressure, while canisterless systems may result in loss of negative pressure. Research shows that continuous delivery of the intended pressure is necessary for an effective influence zone.
INTERNATIONAL WOUND JOURNAL
(2023)
Article
Engineering, Marine
Yi Zhang, Wei Wang, Jian Shuai, Yi Shuai, Luoyi Hua, Zhiyang Lv
Summary: This study presents a new systematic evaluation method for assessing the interaction between adjacent corrosion defects and its impact on pipeline integrity. Through a finite element model, the relationship between defect spacing, geometry, and burst pressure of the pipe was investigated. An interaction identification criterion applicable to asymmetrical defects was proposed and validated by finite element simulations. The results show that the arrangement of corrosion affects the interaction between adjacent defects.
Article
Public, Environmental & Occupational Health
Yushin Lee, Yong Min Kim, Sujin Pyo, Myung Hwan Yun
Summary: This study applied machine learning techniques to classify nine representative sitting postures of children based on pressure distribution data. The results of the experiments demonstrated that a convolutional neural network is an excellent classification method when pressure distribution data is used as input.
WORK-A JOURNAL OF PREVENTION ASSESSMENT & REHABILITATION
(2022)
Article
Engineering, Civil
Yi Shuai, Xinhua Wang, Junqiang Wang, Heng-Gang Yin, Y. Frank Cheng
Summary: The study showed that the type-B sleeve repair method effectively restores the pressure-bearing capacity of the corroded X80 steel pipeline under internal pressure, with burst failures typically occurring far from the sleeve and defect region. The depth of the corrosion defect significantly affects repair effectiveness, while the length and width of the defect have limited impact on the stress level of the repaired pipeline.
THIN-WALLED STRUCTURES
(2021)
Review
Dermatology
Amit Gefen
Summary: This article evaluates the performance of materials used for pressure ulcer prevention, focusing on the alleviation of tissue loads and microclimate management. It provides quantitative performance criteria and grades commonly used material types, guiding clinicians and industry in selecting dressings for pressure ulcer prevention.
INTERNATIONAL WOUND JOURNAL
(2022)
Article
Dermatology
Aleksei Orlov, Adi Lustig, Angela Grigatti, Amit Gefen
Summary: This study develops a robotic phantom system to evaluate the fluid absorbency, retention performance, and mechanical durability of silver-containing gelling fiber primary dressings when used with a secondary dressing. The results demonstrate that the primary dressing has better fluid absorbency, retention, and mechanical strength compared to other dressings.
ADVANCES IN SKIN & WOUND CARE
(2022)
Review
Dermatology
Mai Dabas, Dafna Schwartz, Dimitri Beeckman, Amit Gefen
Summary: This study provides an in-depth overview of the methodologies of artificial intelligence (AI) and their potential implementation in wound care and management. The findings highlight the positive impact and prospects of AI in improving healthcare quality and efficiency, as well as the emergence of AI-based remote consultation systems.
ADVANCES IN WOUND CARE
(2023)
Article
Dermatology
Aleksei Orlov, Amit Gefen
Summary: There are two design concepts for single-use negative pressure wound therapy systems: canister-based and canisterless. The canister-based technology provides stable delivery of negative pressure, while canisterless systems may result in loss of negative pressure. Research shows that continuous delivery of the intended pressure is necessary for an effective influence zone.
INTERNATIONAL WOUND JOURNAL
(2023)
Article
Dermatology
Aleksei Orlov, Amit Gefen
Summary: Prolonged use of positive airway pressure masks can lead to facial tissue breakdown, but this risk can be reduced with suitable cushioning materials. By comparing different dressings through experiments and computational modeling, it was found that foam-based dressings generally outperformed hydrocolloid dressings.
INTERNATIONAL WOUND JOURNAL
(2023)
Article
Dermatology
Aleksei Orlov, Amit Gefen
Summary: In this study, we developed a robotic system with two venous leg ulcers to test the fluid handling performance of three wound dressing types. The results indicated that foam-based dressing technology is not effective for managing exuding venous leg ulcers. Additionally, wound dressings containing superabsorbent polymers do not demonstrate equal performance in fluid handling for different wound scenarios.
INTERNATIONAL WOUND JOURNAL
(2023)
Review
Dermatology
Breda Cullen, Amit Gefen
Summary: Chronic wounds are a global issue that not only affects patients' health but also imposes a significant burden on society. This review explores the reasons for wound healing failure, the pathophysiology of chronic wounds, and the design and evaluation of dressings. It emphasizes the importance of understanding wound exudates and developing laboratory models for testing dressings. The findings have significant implications for improving dressing effectiveness, enhancing patient outcomes, and reducing the economic burden of chronic wounds.
INTERNATIONAL WOUND JOURNAL
(2023)
Article
Dermatology
Amit Gefen, Paulo Alves, Dimitri Beeckman, Jose Luis Lazaro-Martinez, Hadar Lev-Tov, Bijan Najafi, Terry Swanson, Kevin Woo
Summary: The mechanical performance of foam materials in foam-based wound dressings plays a crucial role in the clinical outcomes and cost of care. This article provides a comprehensive overview of the theoretical and practical considerations related to the mechanical performance of foams in wound dressings, based on published research and clinical experience. This information is important for clinicians, researchers, regulators, and buyers in the wound care field.
INTERNATIONAL WOUND JOURNAL
(2023)
Article
Neurosciences
Hadar Shaulian, Amit Gefen, Hen Biton, Alon Wolf
Summary: This study investigates a novel graded-stiffness offloading method for diabetic heel ulcers, which can effectively redistribute heel pressure and reduce focal stress concentration areas. The results show that the graded-stiffness offloading solution is more effective in reducing and redistributing peak pressure and pressure dose compared to existing solutions.
Article
Dermatology
Tomer Katz, Amit Gefen
Summary: Support surfaces play a crucial role in preventing pressure ulcers/injuries for at-risk patients. Hybrid support surfaces, combining reactive and active properties, provide pressure redistribution through the use of high-quality foam material inside inflatable air cells. This study uses computational modelling and simulations to investigate the effects of static and dynamic modes of a hybrid support surface on soft tissue loading at the buttocks. Results show that the dynamic mode effectively relieves deep tissue pressure under the sacral bone and generates a deep tissue offloading effect by shifting the loading towards the coccyx.
INTERNATIONAL WOUND JOURNAL
(2023)
Article
Dermatology
Charlotte Raepsaet, Paulo Alves, Breda Cullen, Amit Gefen, Jose Luis Lazaro-Martinez, Hadar Lev-Tov, Bijan Najafi, Nick Santamaria, Andrew Sharpe, Terry Swanson, Kevin Woo, Dimitri Beeckman
Summary: The aim of this project was to develop a core outcome set (COS) for clinical effectiveness studies of bordered foam dressings in the treatment of complex wounds. The project followed the COMET initiative and consisted of two phases. The outcomes were generated through a systematic review, qualitative study, Delphi consensus study, and consensus meeting.
JOURNAL OF TISSUE VIABILITY
(2023)
Article
Biology
Maayan Lustig, Yoram Epstein, Amit Gefen
Summary: This study developed a novel finite element modeling framework to evaluate and rate the biomechanical efficacy of ballistic protective plates (BPPs) in protecting the torso from non-penetrating impacts acquired on the battlefield.
COMPUTERS IN BIOLOGY AND MEDICINE
(2023)
Article
Dermatology
Aleksei Orlov, Marino Ciliberti, Rosa Somma, Amit Gefen
Summary: In this study, we compared the fluid handling performance of different wound care products using advanced robotic technology. The single-use negative pressure wound therapy system emerged as the leading treatment option, while the foam dressing exhibited the poorest fluid handling performance.
INTERNATIONAL WOUND JOURNAL
(2023)
Article
Dermatology
Mai Dabas, Ida Kreychman, Tomer Katz, Amit Gefen
Summary: We investigated the reactions of healthy sacral skin to sustained mechanical loading by measuring inflammatory and thermal responses. Infrared thermography outperformed digital photography in detecting skin irritation trends. Polymeric membrane dressings were more effective in reducing inflammation and managing microclimate compared to polyurethane foam. Infrared thermography is a feasible method for monitoring skin health and risk for pressure ulcers.
INTERNATIONAL WOUND JOURNAL
(2023)
Article
Dermatology
Suzanne Kapp, Marie Gerdtz, Charne Miller, Amit Gefen, William Padula, Lauren Wilson, Michael Woodward, Nick Santamaria
Summary: Pressure injuries are common in aged care facilities and have a significant impact on healthcare systems. Remote expert wound nurse consultation shows potential in improving pressure injury outcomes, but more research is needed to determine its effectiveness and cost-effectiveness in residential aged care. This study describes a pilot randomized controlled trial investigating the intervention, with outcomes including wound healing rate, infection, quality of life, and cost of treatment. The results will inform future trials evaluating the clinical and economic benefits of remote expert wound nurse consultation in this setting.
INTERNATIONAL WOUND JOURNAL
(2023)
Article
Engineering, Biomedical
Xinyao Zhu, Yifan Liu, Jing Ye, Wei Xu, Xuexia Zhao, Tianyan Liu
Summary: This study reveals the adverse effect of acid on dentin in terms of degradation of its fracture toughness. The peritubular dentin plays a significant role in enhancing the dentin's fracture resistance capability. The findings highlight the importance of structural integrity for dentin.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2024)
Article
Engineering, Biomedical
Priya Ranganathan, Vijayakumari Sugumaran, Bargavi Purushothaman, Ajay Rakkesh Rajendran, Balakumar Subramanian
Summary: The study aims to design and fabricate an ultra-easier multi-functional biomedical polymeric scaffold loaded with unique equimolar Ca:P phasic bioactive glass material. The results showed that the G:BG (1:2) ratio is the more appropriate composition for enhanced bio-mineralization and higher surface area. The scaffold can induce mitogenesis in osteoblast cells for hard tissue regeneration and rapid collagen secretion in fibroblast cells for soft tissue regeneration.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2024)
Article
Engineering, Biomedical
Ziad Guerfi, Oum keltoum Kribaa, Hanane Djouama
Summary: Hydroxyapatite, a biocompatible and bioactive ceramic material, has been widely studied in fields such as orthopedics and plastic surgery. The use of computational tools, especially density functional theory, has become increasingly important in research. In this study, Hydroxyapatite was synthesized using the double decomposition method and quantum mechanical computations were performed using density functional theory. The experimental and computational results confirmed the successful synthesis of Hydroxyapatite and showed good agreement in spectroscopic characterizations.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2024)
Article
Engineering, Biomedical
Sally AbdulHussain Kadhum, Nassier A. Nassir
Summary: In this research, porous composites were successfully prepared and reinforced for bone scaffold applications. The functional groups, pore structure, and composition distribution of the materials were characterized using techniques such as FTIR, Atomic Force Microscopy (AFM), and Scanning Electron Microscopy (SEM).
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2024)
Article
Engineering, Biomedical
Veronika Geiger, Felicitas Mayinger, Moritz Hoffmann, Marcel Reymus, Bogna Stawarczyk
Summary: The study investigated the mechanical properties of four additively manufactured denture base resins in different measurement environments, and found that the measurement environment impacts the strength and fracture toughness of the materials.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2024)
Article
Engineering, Biomedical
Junxiao Wang, Amatjan Sawut, Rena Simayi, Huijun Song, Xueying Jiao
Summary: The development of cost-effective and eco-friendly conductive hydrogels with excellent mechanical properties, self-healing capabilities, and non-toxicity is of great significance in the field of biosensors.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2024)
Article
Engineering, Biomedical
Yijun Zhou, Lisa Ho, Ayan Samanta, Philip Procter, Cecilia Persson
Summary: In this study, soft, non-setting biomaterials based on Hyalectin gels and different morphological parameters of hydroxyapatite (HA) particles were evaluated as potential augmentation materials for orthopaedic implant fixation. The results showed that constructs reinforced with irregularly shaped nano-HA particles and spherically shaped micro-HA particles had significantly higher pull-out force compared to the control group.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2024)
Article
Engineering, Biomedical
Mehdi Jahandardoost, Donald Ricci, Abbas S. Milani, Mohsen Jahandardoost, Dana Grecov
Summary: Tubular flow diverters are important for treating cerebral aneurysms. A new design called VR-eCLIPs has been developed to cover the neck of challenging bifurcation aneurysms. A finite element model has been used to simulate the implantation processes of VR-eCLIPs and assess potential plastic deformation.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2024)
Article
Engineering, Biomedical
Marek Traczynski, Adam Patalas, Katarzyna Roslan, Marcin Suszynski, Rafa l Talar
Summary: This article evaluates the forces acting on intravenous needles during insertion into the skin and selects the most suitable model for future research. The experimental results show that needle size, insertion angle, and insertion speed have an influence on the measured force values.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2024)
Article
Engineering, Biomedical
Chester Jar, Andrew Archibald, Monica Gibson, Lindsey Westover
Summary: This study evaluates the ASIST technique for assessing the stability of dental implants. The results show that the ASIST technique can reliably measure the interfacial stiffness of dental implants, which is not significantly influenced by different abutment types. This method may provide an improved non-invasive way to measure the stability of dental implants.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2024)
Article
Engineering, Biomedical
Ali Kamali, Kaveh Laksari
Summary: In this paper, a UNet-based neural network model (El-UNet) is developed to infer the spatial distributions of mechanical parameters. The El-UNet shows superior performance in terms of accuracy and computational cost compared to other neural network models. A self-adaptive spatial loss weighting approach is proposed, which achieves the most accurate reconstructions in equal computation times.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2024)
Article
Engineering, Biomedical
Chunyan Yu, Yanju Lu, Jinhui Pang, Lu Li
Summary: In this study, a safe and effective hemostatic composite sponge was developed by combining chitosan and hydroxypropylmethylcellulose (HPMC). The sponge exhibited excellent flexibility and rapid hemostatic ability in vitro. In vivo assessments showed that the sponge had the shortest clotting time and minimal blood loss.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2024)
Article
Engineering, Biomedical
Zhongliang Yu, Lin Yu, Junjie Liu
Summary: The study proposes incorporating functionally graded tablets into nacreous composites to enhance both stiffness and damping properties. Analytical formulae and numerical experiments demonstrate the effectiveness of this design, surpassing existing homogeneous composites in performance.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2024)
Article
Engineering, Biomedical
Marc Graham, Sandra Klinge
Summary: This study investigates the macroscopic diffusion behavior of heterogeneous gels using a homogenization method in a finite element framework. Two materials, calcifying PDMA and PAAm, were studied, and the results show that the diffusivity of PDMA has a strong nonlinear dependence on the solute molecule radius.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2024)
Article
Engineering, Biomedical
Abdur-Rasheed Alao
Summary: This study aimed to find the optimal sandblasting parameters for roughening YTZP surfaces. Through experimental and statistical analysis, the best setting was found to be IA = 45 degrees, AP = 110 μm, ST = 20 s, and P = 400 kPa, which resulted in the maximum surface roughness, phase transformation, and shear bond strength.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2024)