Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine最新文献_第5页

From healthy to osteoporotic: Exploring how bone quality alters implant performance in Pauwels type III fracture. 从健康到骨质疏松：探讨骨质量如何改变paulwels III型骨折的植入物性能。

IF 1.7 4区医学

Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine Pub Date : 2025-05-01 Epub Date: 2025-04-21 DOI: 10.1177/09544119251333671

Biswajit Mahapatra, Bidyut Pal

{"title":"From healthy to osteoporotic: Exploring how bone quality alters implant performance in Pauwels type III fracture.","authors":"Biswajit Mahapatra, Bidyut Pal","doi":"10.1177/09544119251333671","DOIUrl":"10.1177/09544119251333671","url":null,"abstract":"Osteoporosis compromises bone strength, making bone more susceptible to fractures. Decreased bone density heightens susceptibility to femoral neck fractures. The study investigated the impact of bone density on implant performance across three categories of bone quality: healthy, osteopenic, and osteoporotic. The effectiveness of three commonly used implant types (Femoral Neck System, Dynamic Condylar Screw, and Dynamic Hip Screw, where later two equipped with an anti-rotational screw) was evaluated through finite element analysis for treating Pauwels type III fracture. The bone geometry and material properties were based on a subject-specific CT data. The density and Young's modulus of bone elements were adjusted to simulate osteopenic and osteoporotic bone. FE models were developed and the peak loading values for normal walking and stair climbing conditions were considered. Stability and performance of the implant were assessed using bone strain, implant stress, deformation and rotation of the femoral head, micromotion at the interfaces, strain shielding, and risk of implant cut-out. Except for DCS with AR-screw and FNS implants under stair climbing conditions in weaker bone qualities, the implant stress remained within the yield limit of Ti-alloy. The comprehensive assessment identified DHS2 as the preferred implant option for treating such fractures, even in poor bone quality. The risk of cut-out risk was up to 3.9% higher in DCS2 and 6.3% higher in FNS implanted models than in DHS2. The effect of change in bone quality was comparatively less in DHS2 implants than the other two types.","PeriodicalId":20666,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine","volume":" ","pages":"436-447"},"PeriodicalIF":1.7,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144029172","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of cage surface geometry on load transfer and ranges of motion in a fused lumbar spine model: A comparative finite element analysis. 融合腰椎模型中笼面几何形状对载荷传递和运动范围的影响：比较有限元分析。

IF 1.7 4区医学

Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine Pub Date : 2025-05-01 Epub Date: 2025-04-16 DOI: 10.1177/09544119251332072

Tirtharaj Banerjee, Kishore Pradeep, Aritra Karar, Bidyut Pal

{"title":"Effect of cage surface geometry on load transfer and ranges of motion in a fused lumbar spine model: A comparative finite element analysis.","authors":"Tirtharaj Banerjee, Kishore Pradeep, Aritra Karar, Bidyut Pal","doi":"10.1177/09544119251332072","DOIUrl":"10.1177/09544119251332072","url":null,"abstract":"Lumbar degenerative disc diseases (DDDs) are the common causes of low back pain, leading to non-conservative treatments like fusion and non-fusion surgery as a last resort. Fusion surgery is the gold standard for addressing DDDs, where implants such as cages, pedicle screws and rods are used for posterior stabilization. Various finite element (FE) studies have reported using corrugated cage surface textures; some others have used flat textures for virtual implantation. No comparative studies have been reported on the biomechanical effects of fusion surgery under implantation with cages of varying surface textures. The present biomechanical study compares the mechanical behaviour of an L4-L5 segment implanted with cages of different surface textures. The surgical techniques used for implantation are posterior lumbar interbody fusion (PLIF) and transforaminal lumbar interbody fusion. The virtual surgical models were developed from a previously validated intact lumbar spine FE model and simulated for physiological loading conditions. Compared to the flat cage implantation, a higher magnitude of stress was experienced by the cages and pedicle screw-rod systems under corrugated cage implantation. The maximum von Mises stress generated in the PLIF corrugated cage was 80.69% more than that observed in the flat cage. The maximum stresses in the corrugated cage were higher than those of the flat cage by 38.43%-80.69%, considering all the applied loading conditions. The findings of the study suggest that corrugated cage surface texture and suitable material selection may help in improving the long-term stability of cages.","PeriodicalId":20666,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine","volume":" ","pages":"423-435"},"PeriodicalIF":1.7,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144035481","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effectiveness of virtual reality rehabilitation for cervical spinal cord injury: A systematic review and meta-analysis. 虚拟现实康复治疗颈脊髓损伤的有效性：系统回顾和荟萃分析。

IF 1.7 4区医学

Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine Pub Date : 2025-05-01 Epub Date: 2025-05-04 DOI: 10.1177/09544119251337381

Viprav B Raju, Brian D Schmit, Aditya Vedantam

{"title":"Effectiveness of virtual reality rehabilitation for cervical spinal cord injury: A systematic review and meta-analysis.","authors":"Viprav B Raju, Brian D Schmit, Aditya Vedantam","doi":"10.1177/09544119251337381","DOIUrl":"10.1177/09544119251337381","url":null,"abstract":"This systematic review and meta-analysis evaluated the effectiveness of virtual reality (VR) rehabilitation in improving functional performance for patients with cervical spinal cord injury (CSCI), which affects both upper and lower limb function. Following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines, electronic databases including PubMed, Medline, Embase, Scopus, and Cochrane Library were searched. Meta-analysis was conducted on studies reporting common functional outcomes, with standardized mean difference (SMD) used to quantify effect sizes. Nine studies were included in the systematic review, and seven were analyzed in the meta-analysis. Three studies focused on upper limb outcomes, and six on lower limb function. Of the seven studies, four included only CSCI patients, while three had mixed injury cohorts (cervical and thoracic). Meta-analysis revealed no statistically significant improvements in function for mixed injury cohorts across various outcomes: Timed-Up and Go test (SMD 0.94 [-0.21, 2.09]), Berg Balance Scale (-0.83 [-1.72, 0.07]), Walking Index for Spinal Cord Injury II (-0.38 [-0.86, 0.09]), Spinal Cord Independence Measure (-0.41 [-0.92, 0.10]), and 10 Meter Walk Test (-1.43 [-3.58, -0.73]). However, the Timed-Up and Go test showed significant results favoring VR-based rehabilitation when excluding mixed cohorts (SMD 2.02 [1.24, 2.79]). VR rehabilitation shows promise for improving lower limb function in CSCI patients, but overall evidence remains inconclusive due to study variability. Standardizing outcome measures and further research on upper limb rehabilitation are essential to enhance the impact of VR-based interventions for CSCI.","PeriodicalId":20666,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine","volume":" ","pages":"413-422"},"PeriodicalIF":1.7,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144030624","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

On design, fabrication, and pre-clinical validation of customized 3D-printed dental implant assembly. 设计，制造和定制3d打印牙科种植体组件的临床前验证。

IF 1.7 4区医学

Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine Pub Date : 2025-05-01 Epub Date: 2025-05-06 DOI: 10.1177/09544119251337363

Vaibhav Sahni, Vishakha Grover, Satinder Singh, Rishab, Smruti Pradhan, Rupinder Singh, Amrinder Pal Singh, Ankush Mehta, Ashish Jain

{"title":"On design, fabrication, and pre-clinical validation of customized 3D-printed dental implant assembly.","authors":"Vaibhav Sahni, Vishakha Grover, Satinder Singh, Rishab, Smruti Pradhan, Rupinder Singh, Amrinder Pal Singh, Ankush Mehta, Ashish Jain","doi":"10.1177/09544119251337363","DOIUrl":"10.1177/09544119251337363","url":null,"abstract":"In the past few decades, 3D-printed dental implants have been manufactured, and significant studies have demonstrated the pre-clinical validation of such systems. However, studies have yet to tackle the ever-present issue of preventing the jumping gap to enhance overall outcomes. The present study details the utilization of patient computed tomography (CT) data to design and subsequently fabricate a multi-component customized dental implant assembly and customized instruments using direct metal laser sintering (DMLS) technology. The workflow was validated for two patient data sets (cases 1 and 2), which were used to render and print custom implant assemblies; the simulation data for these were compared with a commercially available solution. The present study incorporated a prototype stage as well as subjecting the customized implant assemblies to both static (Case 1: 38.89-77.81 MPa vs 75.47-158.09 MPa; Case 2: 83.95-106.65 MPa vs 55.23-126.57 MPa) and dynamic finite element analysis (Case 1: 41.08-84.09 MPa vs 75.45-187.91 MPa; Case 2: 106.81-108.70 MPa vs 79.18-135.48 MPa) along with resonance frequency analysis (Case 1: 7763.2 Hz vs 7003.6 Hz; Case 2: 7910.1 Hz vs 7102.1 Hz) as well as residual stress analysis. The assembly's stress patterns and resonance frequencies were evaluated against a commercially available implant system. It was observed that the customized implant assemblies tended to outperform the commercially available solution in most simulated scenarios.","PeriodicalId":20666,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine","volume":" ","pages":"458-471"},"PeriodicalIF":1.7,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144009789","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development and evaluation of a novel 3D in-shoe plantar strain measurement system: STAMPS3D. 新型三维鞋内足底应变测量系统STAMPS3D的开发与评价。

IF 1.7 4区医学

Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine Pub Date : 2025-05-01 Epub Date: 2025-04-12 DOI: 10.1177/09544119251330738

Francesca Sairally, Rory P Turnbull, Heidi J Siddle, David A Russell, Claire Brockett, Peter R Culmer

{"title":"Development and evaluation of a novel 3D in-shoe plantar strain measurement system: STAMPS3D.","authors":"Francesca Sairally, Rory P Turnbull, Heidi J Siddle, David A Russell, Claire Brockett, Peter R Culmer","doi":"10.1177/09544119251330738","DOIUrl":"10.1177/09544119251330738","url":null,"abstract":"The formation of diabetic foot ulcers (DFU) is consequential of peripheral neuropathy, peripheral arterial disease and foot deformity, leading to altered foot biomechanics and plantar loads. Plantar load comprises of normal pressure and shear stress, however, there are currently no in-shoe devices capable of measuring both components. The STrain Analysis and Mapping of the Plantar Surface (STAMPS) system, developed at the University of Leeds, utilises Digital Image Correlation (DIC) to measure the strain captured by a plastically deformable insole, as a method to understand plantar load during gait. A 2D DIC software was used to capture cumulative plantar strain and displacement pointwise data, however this method was limited to the analysis of planar surfaces. To address this, 3D instrumentation and DIC methods have been developed and implemented into the STAMPS3D system, used as a tool to capture data that is representative of the non-planar nature of plantar surfaces of the foot. A case-study is used to demonstrate how STAMPS3D can measure multi-dimensional strain, bringing potential to improve clinical screening of DFU risk.","PeriodicalId":20666,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine","volume":" ","pages":"472-484"},"PeriodicalIF":1.7,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12075883/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144026024","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Non-rigid cutting characteristics and separation mechanisms of soft muscle tissue under waterjet impact. 水射流冲击下软肌肉组织的非刚性切割特性及分离机制。

IF 1.5 4区医学

Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine Pub Date : 2025-05-01 Epub Date: 2025-04-29 DOI: 10.1177/09544119251333679

Jiaqi Zhao, Xiao-Fei Song, Xiaoxian Wei, Wenli Yu, Xiubing Jing

{"title":"Non-rigid cutting characteristics and separation mechanisms of soft muscle tissue under waterjet impact.","authors":"Jiaqi Zhao, Xiao-Fei Song, Xiaoxian Wei, Wenli Yu, Xiubing Jing","doi":"10.1177/09544119251333679","DOIUrl":"10.1177/09544119251333679","url":null,"abstract":"Muscle tissue is most frequently cut or separated in surgery. Waterjet as an emerging non-rigid cutting method is newly introduced into soft tissue dissection which shows a great potential in soft muscle cutting for low-trauma surgery. However, the cutting mechanisms of muscle material to waterjet impact remain unknown. This study reports the cutting responses of muscle tissue to waterjet impact. Waterjet morphology, depths of cut, cutting surface morphology and deformation of muscles were experimentally investigated using a computer-controlled waterjet machine. The mechanical properties of muscles were also measured to explore the property-processing relation. The conversion relationship between kinetic energy of waterjet and potential energy of muscle damage was established based on energy balance theory. Based on the experimental investigation and fracture mechanism analysis, the critical and the reasonable waterjet separation pressures for the muscles were respectively 0.8-1.1 MPa and 1.4-2.0 MPa for balancing separation efficiency and surrounding tissue protection. It was also found the muscle depth of cut under waterjet impact significantly increased with the impact pressure, but rapidly reduced with the increase in impact angle and transverse speed. In addition, a new phenomenon of swelling effect of the muscles was discovered in waterjet impact, which heavily affects the depths of cut. The proper stand-off distance was determined considering the muscle swelling effect and initial segment of waterjet. This research first provides practical insights into the process selection and quality control for waterjet cutting of soft muscles, advancing the clinical application of waterjet to muscle separation.","PeriodicalId":20666,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine","volume":" ","pages":"485-497"},"PeriodicalIF":1.5,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144035486","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Assessment of the incisor angles as a function of golden proportion and lower facial height. 评估门牙角度作为黄金比例和下面部高度的函数。

IF 1.7 4区医学

Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine Pub Date : 2025-05-01 Epub Date: 2025-04-21 DOI: 10.1177/09544119251333905

Agustín Vidal-Lesso, José Alejandro Ortíz-García, Eduardo Villagómez-Cintora, Perla Pimienta-Rodríguez, Diana Martínez-Estrada, Rosa Alcocer-Covarrubias, Jose Jaime Lesso-García

{"title":"Assessment of the incisor angles as a function of golden proportion and lower facial height.","authors":"Agustín Vidal-Lesso, José Alejandro Ortíz-García, Eduardo Villagómez-Cintora, Perla Pimienta-Rodríguez, Diana Martínez-Estrada, Rosa Alcocer-Covarrubias, Jose Jaime Lesso-García","doi":"10.1177/09544119251333905","DOIUrl":"10.1177/09544119251333905","url":null,"abstract":"Mathematical models to determine diverse parameters in biological systems have been a challenging and interesting topic for the scientific community. This work aimed to determine the angles of the lower and upper incisor teeth as a function of the angle of the lower facial height and the golden proportion. The cephalometric parameters reported by Ricketts like the lower facial height angle, the axis of the mandibular body (Xi-Pm), the line that forms the mandibular geometric center with the anterior nasal spine (Xi-ENA), the occlusal plane, the dental line, and the upper and lower incisors lines and some cephalometric constraints were used to determine the proposed models.The analysis of several values for the lower facial height in the Ricketts range showed that both the model for the upper incisor (A) and lower incisor (B) provide functional values for these angles, which are within the statistical range reported by Ricketts with a maximum mean deviation of 1.58° and a maximum percentage difference of up to 10.40%. Outside of the Ricketts range, a maximum mean deviation of 5.15° and a maximum difference of up to 49.72% was found regarding the mean values. As a first approximation, the proposed models let us determine and personalize the target angle for orthodontic treatment of the upper and lower incisors based on the lower facial height of each patient and the golden proportion. These models can be a starting point for further research in this area, considering other parameters to be added to the proposed models.","PeriodicalId":20666,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine","volume":" ","pages":"448-457"},"PeriodicalIF":1.7,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144008314","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evaluation of the mechanical properties and cell cultural behavior of diamond lattice scaffolds with different porosities. 不同孔隙率金刚石晶格支架的力学性能及细胞培养行为评价。

IF 1.7 4区医学

Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine Pub Date : 2025-04-01 Epub Date: 2025-03-28 DOI: 10.1177/09544119251328434

Hojjat Ghahramanzadeh Asl, Selcen Çelik Uzuner, Salim Çam, Uğur Uzuner

{"title":"Evaluation of the mechanical properties and cell cultural behavior of diamond lattice scaffolds with different porosities.","authors":"Hojjat Ghahramanzadeh Asl, Selcen Çelik Uzuner, Salim Çam, Uğur Uzuner","doi":"10.1177/09544119251328434","DOIUrl":"10.1177/09544119251328434","url":null,"abstract":"Metal porous structures are a common treatment for bone tissue loss when the loss exceeds the self-repair capacity of the human body. The structural characteristics, mechanical properties, and biological behavior of scaffold biomaterials exert a significant influence on the formation of new bone cells. The objective of this study was to ascertain the mechanical and cell biological behavior of scaffold structures with four distinct porosities (60%, 70%, 80%, and 90%). Scaffold structures with a diamond lattice unit cell were manufactured by the selective laser melting method using a CoCr alloy powder with a diameter of 4 mm and a height of 5 mm and were then subjected to a static compression test. Subsequently, human gingival fibroblast cells were seeded into each sample via the cell culture process, and cell formation was observed. According to the results obtained from the compression test, the sample with 60% porosity demonstrated optimal mechanical performance and effective modulus of elasticity. In the cell culture process, the sample with 60% porosity exhibited the highest adherence rate.","PeriodicalId":20666,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine","volume":" ","pages":"388-397"},"PeriodicalIF":1.7,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143731504","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A novel method for analyzing foot motion during circumduction using an electromagnetic tracking system. 一种利用电磁跟踪系统分析绕行过程中足部运动的新方法。

IF 1.5 4区医学

Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine Pub Date : 2025-04-01 Epub Date: 2025-04-12 DOI: 10.1177/09544119251329994

Nicholas R Entress, Michael J Fassbind, Eric S Rohr, Michael S Orendurff, Bruce J Sangeorzan, William R Ledoux

{"title":"A novel method for analyzing foot motion during circumduction using an electromagnetic tracking system.","authors":"Nicholas R Entress, Michael J Fassbind, Eric S Rohr, Michael S Orendurff, Bruce J Sangeorzan, William R Ledoux","doi":"10.1177/09544119251329994","DOIUrl":"10.1177/09544119251329994","url":null,"abstract":"Circumduction of the hindfoot does not occur primarily in one of the traditional anatomic planes and can be difficult to describe precisely. The purpose of this study was to measure foot bone motion quickly and objectively to subsequently characterize differences among feet of varying shapes. As such, we have developed a quantitative characterization of foot bone motion during circumduction using electromagnetic tracking sensors. Five of these sensors were attached to the foot on specific bony landmarks, and one was attached to a footplate. The lower leg was held by padded clamps in a custom non-ferrous jig, and the foot was moved through a full range of circumduction. To describe the motion of the bones of the foot during circumduction, the sensor positions were fitted to 2D ellipses and 3D curves. A repeatability study on multiple feet (n = 7) demonstrated that multiple raters (n = 3) introduced more error than a single rater; therefore, a single rater was used for all subsequent data collection. Results from five neutrally aligned subjects demonstrated that bone motion was quantifiable by fitted ellipse parameters. Additional modeling with a paraboloid surface described the motion with improved accuracy. A further reduction in error was obtained using a 3D eighth-order Fourier series expansion fit. This method holds promise as a means for characterizing differences in foot bone motion among foot types during a clinical exam.","PeriodicalId":20666,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine","volume":"239 4","pages":"349-359"},"PeriodicalIF":1.5,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143995712","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of custom-made insole on the mechanical response characteristics of the foot during static standing and walking. 定制鞋垫对足部静态站立和行走时机械响应特性的影响。

IF 1.7 4区医学

Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine Pub Date : 2025-04-01 Epub Date: 2025-04-16 DOI: 10.1177/09544119251328060

Chenyan Wang, Weijin Du, Zhiqiang Li, Weiyi Chen

{"title":"Effects of custom-made insole on the mechanical response characteristics of the foot during static standing and walking.","authors":"Chenyan Wang, Weijin Du, Zhiqiang Li, Weiyi Chen","doi":"10.1177/09544119251328060","DOIUrl":"https://doi.org/10.1177/09544119251328060","url":null,"abstract":"Custom-made insoles are designed to redistribute foot load and prevent potential pain. Common methods to investigate the effectiveness of insoles include finite element method and experimental approach. However, most finite element research has focused on the two-dimensional plantar fascia stresses during static standing with insoles, rather than those of three-dimensional plantar fascia. Furthermore, the effects of insole with design parameters (metatarsal pad, toe pad, and arch support) on dynamic plantar pressures still need further exploration. Therefore, this study aimed to quantify the impact of custom-made insoles on foot biomechanics by combining both methods. Finite element method was employed to evaluate stress on the plantar fascia and bony structures when static standing, both barefoot and with a custom-made insole. Furthermore, 10 participants were recruited to investigate dynamic plantar pressures during walking barefoot and with insole. The relative time of four subphases during stance phase, total contact time, peak plantar pressure (Peak P), and pressure time integral (PTI) were assessed. Finite element results revealed reduced plantar fascia stresses and more uniform stress distribution over metatarsals and phalanges when standing with insole. Additionally, Peak P and PTI values in the second and third metatarsals were significantly lower when walking with insole. With the presence of insole, Peak P and PTI values in medial regions were significantly reduced, except for the midfoot region. In conclusion, custom-made insole with the addition of a metatarsal pad, toe pad, and arch support can effectively distribute foot tissue stress evenly, alleviate plantar pressure, and thus prevent pain.","PeriodicalId":20666,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine","volume":"239 4","pages":"360-369"},"PeriodicalIF":1.7,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144034145","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0