September 2024
·
2 Reads
Gait & Posture
This page lists works of an author who doesn't have a ResearchGate profile or hasn't added the works to their profile yet. It is automatically generated from public (personal) data to further our legitimate goal of comprehensive and accurate scientific recordkeeping. If you are this author and want this page removed, please let us know.
September 2024
·
2 Reads
Gait & Posture
June 2024
·
4 Reads
June 2024
·
4 Reads
Clinical Biomechanics
May 2024
·
42 Reads
Acta Biomaterialia
May 2024
·
16 Reads
·
1 Citation
Gait & Posture
April 2024
·
195 Reads
·
4 Citations
In this study, a combined subject-specific numerical and experimental investigation was conducted to explore the plantar pressure of an individual. The research utilized finite element (FE) and musculoskeletal modeling based on computed tomography (CT) images of an ankle-foot complex and three-dimensional gait measurements. Muscle forces were estimated using an individualized multi-body musculoskeletal model in five gait phases. The results of the FE model and gait measurements for the same subject revealed the highest stress concentration of 0.48 MPa in the forefoot, which aligns with previously-reported clinical observations. Additionally, the study found that the encapsulated soft tissue FE model with hyper-elastic properties exhibited higher stresses compared to the model with linear-elastic properties, with maximum ratios of 1.16 and 1.88 MPa in the contact pressure and von-Mises stress, respectively. Furthermore, the numerical simulation demonstrated that the use of an individualized insole caused a reduction of 8.3% in the maximum contact plantar pressure and 14.7% in the maximum von-Mises stress in the encapsulated soft tissue. Overall, the developed model in this investigation holds potential for facilitating further studies on foot pathologies and the improvement of rehabilitation techniques in clinical settings.
January 2024
·
10 Reads
Applied Ergonomics
December 2023
·
30 Reads
·
5 Citations
Diabetes Research and Clinical Practice
October 2023
·
28 Reads
·
1 Citation
Heliyon
Introduction Rocker shoes and insoles are used to prevent diabetic foot ulcers in persons with diabetes mellitus and loss of protective sensation, by reducing the plantar pressure in regions with high pressure values (>200 kPa) (e.g., hallux, metatarsal heads and heel). However, forefoot rocker shoes that reduce pressure in the forefoot inadvertently increase pressure in the heel. No studies focused on mitigating the negative effects on heel pressure by optimizing the heel rocker midsole, yet. Therefore, we analyze the effect of different heel rocker parameters on the heel plantar pressure. Methods In-shoe pressure was measured, while 10 healthy participants walked with control shoe and 10 different heel rocker settings. Peak pressure was determined in 7 heel masks, for all shoes. Generalized estimating equations was performed to test the effect of the different shoes on the peak pressure in the different heel masks. Results In the proximal heel, a rocker shoe with distal apex position, small rocker radius and large apex angle (100°), shows the largest significant decrease in peak pressure compared to rocker shoes with more proximally located apex positions. In the midheel and distal heel, the same rocker shoes or any other rocker shoes, analyzed in this study, do not reduce the PP more than 2 % compared to the control shoe. For the midheel and distal heel region with high pressure values (>200 kPa), rocker shoes alone are not the correct option to reduce the pressure to below 200 kPa. Conclusion When using rocker shoes to reduce the pressure in the forefoot, a heel rocker midsole with a distal apex position, small rocker radius and apex angle of 100°, mitigates the negative effects on proximal heel pressure. For the midheel and distal heel, other footwear options as an addition or instead of rocker shoes are needed to reduce the pressure.
September 2023
·
6 Reads
Gait & Posture
... 32,[46][47][48] All osseous structures in the current study were also assumed to possess rigidity, in accordance with previous studies. 9,21,30,49 The mild scoliotic model, designed with the absence of wedging typical in mild scoliosis 26 featured an eccentric mass distribution in front of the vertebrae, strategically placed based on CT images. It is crucial to note that the stability-based kinematics-driven musculoskeletal model of the adolescent F I G U R E 9 GPs' concave-over-convex side von Mises stress ratio (S conv=conx ) in the AIS thoracolumbar spine FEI and FEE models having healthy and concave-sided impaired LGPT + MFL muscles. ...
April 2024
... There has been a significant amount of work done on functionally graded insoles (Teixeira et al. 2021;Muir et al. 2022;Hudak et al. 2022;Channasanon et al. 2023;Shaulian et al. 2022;Kumar et al. 2023;Malki et al. 2024;Li et al. 2023;Geiger et al. 2023;Shaulian et al. 2023). These studies found a reduction in peak plantar pressure with a functionally graded insole between 16% ) and 48% (Malki et al. 2024). ...
December 2023
Diabetes Research and Clinical Practice
... PCU foils, were tested alone or in combination with two candidates for surface modification: a dopamine-based bioadhesive film [dopamine-carboxymethylcellulose (dCMC) conjugate] and a calcium-phosphate (CaP) coating. While the use of dCMC is aimed at forming molecular bonds with tissue surfaces through carboxyl groups of carboxymethylcellulose (20) and the catechol functional groups of dopamine, the CaP coating is designed to encourage bone ingrowth to promote implant stability (21). ...
July 2023
Surface and Coatings Technology
... Selection of cushioning materials for therapeutic footwear is mostly determined on the basis of the clinician's experiences (Malki et al., 2023;Mandolini et al., 2017;Telfer et al., 2017). Charlotte Apps and her colleagues conducted comprehensive in vivo tests using an in-shoe plantar pressure system, aiming to meticulously compare the mechanical attributes of two distinct insole designs. ...
January 2023
... By using rigid instrumentation intended for stabilization to achieve spinal fusion, these goals become conflicting. More dynamic implants, which correct the curve while allowing motion, like an internal brace, may be more appropriate for this purpose; however, these have not yet been investigated in an AIS population [12,13]. ...
November 2022
The Spine Journal
... In Europe alone, the cost of fractures has been estimated to be around EUR 37 billion [1]. In fact, they constitute at least 66% of significant physical traumas [2]. Although bone loss happens naturally with age, especially among a steadily growing elderly population, many conditions, such as autoimmune diseases, osteoporosis, menopause, and hormonal disorders, accelerate the process to a critical and sometimes Gels 2024, 10, 666 2 of 30 fatal degree [3]. ...
November 2021
Journal of the Mechanical Behavior of Biomedical Materials
... If we would simply reduce the amount of noise, would that then be enough to improve patient outcome? Unfortunately, while noise reduction has been the primary interest of many ICU-related interventions (Kim et al., 2021;Luetz et al., 2019), its effectiveness on patientcentered outcomes remains inconclusive (Delaney et al., 2019). An explanation is that the perceived meaning and quality of the perceived sounds in ICUs play a major role. ...
August 2021
Journal of Medical Internet Research
... Mini-pig models have also recently been utilized as a model of scoliosis to demonstrate how the biomechanical properties of the flexible, growing spine can be harnessed to induce a scoliotic deformity [60,61]. ...
March 2021
The Spine Journal
... Then, data preprocessing is needed, including data cleaning, standardization, feature extraction and other operations to generate data that meets the input requirements of the model. Then, according to the biomechanical principle and the actual situation, people need to select the characteristics related to running posture optimization, such as knee exion, center of gravity position and so on [29]. Then, appropriate machine learning algorithms, such as decision tree, neural network and SVM, can be selected to train the model. ...
March 2021
Gait & Posture
... These factors can lead to air leaks and, consequently, a decrease in voice quality as well as an increase in skin irritation due to repeated acts of removal and application of adhesives [12][13][14][15][16][17]. The failure to achieve a hermetic fixation of the peristomal adhesive is considered one of the factors responsible for the low usage rate of ASV (estimated between 7 and 37.5%) [18]. ...
January 2021
Otolaryngology Head and Neck Surgery