Prosthetics and Orthotics International最新文献

{"title":"Muscle power deficiencies in fallers with lower-limb loss.","authors":"Isabel Lin, Madelyn Foulk, Kylee Seto, Tzurei Chen","doi":"10.1097/PXR.0000000000000473","DOIUrl":"10.1097/PXR.0000000000000473","url":null,"abstract":"<p><strong>Background: </strong>Impaired muscle strength has been linked to increased fall risk in clinical populations (Hunter SW, et al. Risk factors for falls in people with a lower limb amputation: a systematic review. Amer Acad of Phys Med and Rehabil. 2017; 9(2):170-180). Limited studies have investigated muscle power output for individuals with lower-limb loss and high fall risk. This study aims to examine the effects of contraction speed on lower-extremity muscle power among 3 groups: control, nonfaller, and fallers with lower-limb loss.</p><p><strong>Methods: </strong>Thirteen adults without lower-limb loss and 15 adults with lower-limb loss were recruited. Bilateral average power for hip, knee, and ankle was evaluated at 60°/s and 120°/s using a Biodex™ dynamometer. A mixed-model ANOVA was used to identify group and speed effects on muscle power.</p><p><strong>Results: </strong>Sound limb hip extensor and flexor muscle power were significantly weaker in fallers compared with nonfallers ( P = 0.048 and P = 0.43, respectively). Fallers were significantly weaker than control in sound limb hip extensor/flexor and affected knee extensor/flexor muscle groups, while nonfallers' sound hip muscle power was similar to the control. Significant speed effects were found in most muscle power values for control and nonfallers but only found in fallers' sound knee extensors.</p><p><strong>Conclusions: </strong>Sound hip muscle weakness may contribute to a higher fall risk for individuals with lower-limb loss. Control and nonfallers with limb loss actively adjusted their muscle power output during higher velocity contractions, while fallers with limb loss could not adapt. Incorporating high-velocity power training may reduce fall risk in individuals with lower-limb loss.</p>","PeriodicalId":49657,"journal":{"name":"Prosthetics and Orthotics International","volume":" ","pages":"456-464"},"PeriodicalIF":1.4,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144638496","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}

{"title":"Biomechanical effects of spinal orthoses on the trunk during a sit-to-stand-to-sit task.","authors":"Lauren Haworth, Philip Stainton, Claudia Danes-Daetz, Ambreen Chohan, Graham J Chapman, Jim Richards","doi":"10.1097/PXR.0000000000000508","DOIUrl":"10.1097/PXR.0000000000000508","url":null,"abstract":"<p><strong>Background: </strong>Spinal orthoses can be used to limit active range of motion in different directions and to support trunk extension; however, their effect on movement and muscle activity remains uncertain.</p><p><strong>Objective: </strong>This study explored the effects of two semi-rigid spinal orthoses on trunk kinematics and muscle activity compared to no brace (NB).</p><p><strong>Study design: </strong>A pre-clinical, feasibility study.</p><p><strong>Methods: </strong>Markerless motion capture and surface electromyography was collected from 20 healthy participants each performing 5 repetitions of a sit-to-stand-to-sit task under three conditions: NB, Brace A (Medi Spinomed®, Bayreuth, Germany), and Brace B (DonJoy® Osteostrap, Enovis, UK). Repeated measures analysis of variance was used to evaluate trunk kinematics and muscle activity between conditions.</p><p><strong>Results: </strong>During sit-to-stand, average muscle activity of the dominant latissimus dorsi was significantly reduced in Brace A compared to NB (MD = 0.13, p = 0.019), but there were no differences between Brace A and Brace B (MD = -0.08, p = 0.097). During both standing and sitting, participants were significantly more flexed forward in Brace A compared to NB (MD = 1.65-2.23, p < 0.015) and Brace B (MD = 1.46-1.55, p = 0.040). During stand-to-sit, peak extension angular velocity significantly increased in Brace A and Brace B compared to NB (MD = 5.74, p = 0.011, MD = 6.68, p = 0.046, respectively). Central tendencies for perceived comfort were \"comfortable\" for both braces, and perceived ease of task performance was \"very easy\" for Brace A and \"easy\" for Brace B, with brace preference split equally.</p><p><strong>Conclusions: </strong>Active range of motion was not limited using either brace; however, these did assist movement into extension, which may offer a clinical benefit, with small changes also seen in latissimus dorsi muscle activity. Further work including clinical populations is warranted using intervention periods that reflects clinical practice.</p>","PeriodicalId":49657,"journal":{"name":"Prosthetics and Orthotics International","volume":" ","pages":"448-455"},"PeriodicalIF":1.4,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145662533","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}

{"title":"Reliability of capturing plantar foot geometry using a handheld 3D scanner for dose-response modeling of custom-made foot orthoses.","authors":"Stijn Rosseel, Giovanni Matricali, Eleonora Ferraris, Hans Hallez, Annelies Bockstael, Kevin Deschamps","doi":"10.1097/PXR.0000000000000485","DOIUrl":"10.1097/PXR.0000000000000485","url":null,"abstract":"<p><strong>Background: </strong>Efficacy of custom-made foot orthoses largely depends on geometric characterization and outcomes can be suboptimal due to insufficient quantitative insights thereof. Addressing this is crucial for understanding geometric characteristics in dosage-response modeling.</p><p><strong>Objective: </strong>This study evaluates the reliability of digitizing traditional and advanced geometric foot features, using a handheld 3-dimensional (3D) scanning system.</p><p><strong>Methods: </strong>Two examiners used a handheld 3D scanner to capture the foot shape of 30 healthy participants in a non-weight-bearing condition. Intra-tester, test-retest, and inter-tester reliabilities of several linear anthropometric and geometric variables were evaluated. Subsequently, the consistency of capturing the geometry of the plantar foot surface was assessed by quantifying 2 anteroposterior and 2 mediolateral curvilinear plantar surface metrics.</p><p><strong>Results: </strong>Intraclass correlation coefficients for the linear geometric and anthropometric variables' intra- and inter-tester reliability ranged from 0.84 to 1.00. The standard error of measurement for the Z-coordinate of the proximal medial arch point and the forefoot-rearfoot angle was substantially higher compared with the standard error of measurements observed in the other metrics. A pairwise comparison of the 4 curvilinear metrics showed no statistically significant difference on intra-tester and test-retest levels for both examiners. Inter-tester analysis identified significant ( p < 0.05) differences in specific segments of the anteroposterior and mediolateral curvilinear metrics, particularly near the distal and medial ends.</p><p><strong>Conclusions: </strong>These results demonstrated that the digitization of linear anthropometric and geometric measurements of the human foot, obtained using a handheld 3D scanning system in a non-weight-bearing condition, exhibit good to excellent reliability. Additionally, the curvilinear metrics, related to the plantar surface curvature, showed high consistency, supporting its usage to quantify plantar geometry and provide insights into the role of geometric characteristics in dosage-response modeling in custom-made foot orthoses practice.</p>","PeriodicalId":49657,"journal":{"name":"Prosthetics and Orthotics International","volume":" ","pages":"483-490"},"PeriodicalIF":1.4,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145656289","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}

{"title":"A research priority setting for ankle-foot orthosis care in the Netherlands; a survey among rehabilitation specialists, orthotists, and orthotic users.","authors":"Niels F J Waterval, Fieke S Koopman, Frans Nollet, Merel A Brehm","doi":"10.1097/PXR.0000000000000499","DOIUrl":"10.1097/PXR.0000000000000499","url":null,"abstract":"<p><strong>Background and objective: </strong>Ankle-foot orthoses (AFOs) are often prescribed for lower leg muscle impairments. In order to conduct impactful research, we aimed to establish a list of prioritized research questions regarding AFO care in the Netherlands from the perspective of healthcare professionals and AFO users.</p><p><strong>Study design: </strong>A purposefully designed online survey.</p><p><strong>Methods: </strong>To identify relevant research questions regarding the AFO care process the online survey was sent to rehabilitation specialists, orthotists and AFO users in the Netherlands. The research questions were grouped into specific research needs according to the Process description of medical devices. The priority of the research needs was determined using a 11-point numeric rating scale (NRS), with 10 being the highest priority.</p><p><strong>Results: </strong>The survey was completed by 62 rehabilitation specialists, 47 orthotists and 184 AFO users. Rehabilitation specialists prioritized research on \"Effects of AFO properties\" (numeric rating scale score: 8.3 ± 1.2) and \"Choice of AFO type and design\" (8.1 ± 2.0). Orthotists prioritized research on \"How to cast and correct the plaster model\" (8.9 ± 1.3) and \"Effects of AFO properties\" (8.7±1.4). Ankle-foot orthoses users prioritized research on \"Improvement of AFO-shoe fitting and information on appropriate shoes'\" (8.6 ± 1.8) and \"Possibilities to choose and test different AFOs before provision\" (8.5 ± 1.3).</p><p><strong>Conclusions: </strong>Our inventory of research needs has provided a list of research priorities that can be used to structure AFO-related knowledge development. Healthcare professionals and patients have different research priorities that should be taken into account when designing and setting up future AFO-related research.</p>","PeriodicalId":49657,"journal":{"name":"Prosthetics and Orthotics International","volume":" ","pages":"410-417"},"PeriodicalIF":1.4,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13440560/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145543700","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}

{"title":"Comparisons of (cost-)effectiveness of manual, hybrid, and digital shape capture and shape design techniques for transtibial and transfemoral prosthetic sockets: A scoping review.","authors":"Pien van Gastel, Iris Pieta Jacoba Sterkenburg, Gerwin Smit, Merel van der Stelt, Ruud Leijendekkers","doi":"10.1097/PXR.0000000000000531","DOIUrl":"10.1097/PXR.0000000000000531","url":null,"abstract":"<p><p>This scoping review provides an overview of studies comparing the (cost-)effectiveness of shape capture and socket design techniques for transtibial and transfemoral prostheses. The review compares manual, hybrid, and digital methods, identifies the measurement tools used, and assesses their methodological quality. Effectiveness refers to clinical and functional outcomes such as socket fit, comfort, and user function, whereas cost-effectiveness reflects the balance between resource use and these outcomes. Following Preferred Reporting Items for Systematic Reviews and Meta-analysis guidelines, 5 databases (PubMed, Embase, Web of Science, CINAHL, and Cochrane) were systematically searched. Studies involving humans with transtibial or transfemoral prostheses that compared at least 2 of the 3 methods and reported (cost-)effectiveness outcomes were included. Of 556 articles screened, 20 met the inclusion criteria (497 participants). Sixteen studies evaluated transtibial prostheses and 4 transfemoral prostheses. Manual and hybrid methods were compared in 14 studies, and digital and manual methods in 6, whereas none compared hybrid and digital methods. Eighteen studies were rated as low quality, 2 as moderate, and none as high. Effectiveness constructs mainly covered the International Classification of Functioning, Disability and Health domains \"Body functions & Body structures\" and \"Activities and participation,\" but many were not clearly defined within this framework. Reported outcomes most often addressed production time, number of socket attempts, and socket fit or comfort. Overall, evidence remains limited and inconsistent, with a clear lack of direct comparisons between digital and hybrid techniques. Tentatively, hybrid and digital approaches may improve efficiency and comfort compared with manual methods, but robust, standardized research is needed to confirm these effects.</p>","PeriodicalId":49657,"journal":{"name":"Prosthetics and Orthotics International","volume":" ","pages":"491-503"},"PeriodicalIF":1.4,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13440530/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147437105","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}

{"title":"Return to driving after quadriamputation: A case study.","authors":"Thibaut Fraysse, Maëva Cotinat, Sophie Bichard, Laurent Bensoussan, Jean-Michel Viton, Nicolas Prieur-Blanc","doi":"10.1097/PXR.0000000000000470","DOIUrl":"10.1097/PXR.0000000000000470","url":null,"abstract":"<p><p>Quadruple amputation is a rare situation that significantly limits daily activities. Driving is crucial for daily independence. However, there is little literature on the use of adaptive devices to enable individuals with multiple limb amputations to drive. This case study examined the return to driving of Mrs X, a 35-year-old woman who underwent amputation of all 4 limbs (bilateral transtibial, left forearm, and right carpal radius) because of peripheral necrosis following septic shock. After completing a multidisciplinary care and rehabilitation program, Mrs X was able to use customized prostheses and a vehicle specifically adapted to her needs. These modifications enabled her to operate a steering wheel, automatic gearbox, and direction controls. As a result, her driving license was revalidated by the authorities. Mrs X regained the ability to drive independently after her quadruple amputation using adapted prostheses and car controls. Mrs X is now able collect her daughter from school and to attend riding lessons, abilities which have contributed to improving her quality of life.</p>","PeriodicalId":49657,"journal":{"name":"Prosthetics and Orthotics International","volume":" ","pages":"504-508"},"PeriodicalIF":1.4,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144555544","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}

{"title":"Evaluating modified socket casting and molding vs. total surface bearing techniques in unilateral transtibial amputation: Effects on rotational control, socket fit satisfaction, and interface pressure.","authors":"Batoul Bagheripour, Mohammad Ali Mardani, Behnam Hajiaghaei, Akbar Biglarian, Hamid Pezham, Taher Babaee","doi":"10.1097/PXR.0000000000000513","DOIUrl":"10.1097/PXR.0000000000000513","url":null,"abstract":"<p><strong>Objectives: </strong>To achieve functional and comfortable prostheses, great attention must be paid to socket design, as it represents a critical interface between the residual limb and the prosthetic limb. This study aimed to evaluate the outcomes of unilateral transtibial amputees utilizing modified socket casting/molding technique in comparison to total surface bearing (TSB) socket.</p><p><strong>Methods: </strong>Eight individuals with unilateral transtibial amputation participated in this cross-over design trial. Each participant used both the TSB and modified socket casting/molding designs. Four weeks after the utilization of each socket, the assessment was conducted on socket fit satisfaction (measured through the Comprehensive Lower Limb Amputee Socket Survey), socket rotation (evaluated using a standard meter), socket/liner interface pressure (monitored with 10 force-sensitive resistors), and the amputees' decision regarding the retention of one of the sockets after the trials (gauged via a numerical rating scale).</p><p><strong>Results: </strong>The amputees experienced greater stability ( P = 0.02) and improved lateral rotational control ( P = 0.01) during prosthetic gait when using the modified socket, compared with the TSB socket. Local pressure on the anterodistal tibia and the head of the fibula was not statistically significant ( P > 0.05) between 2 socket types. The decision of participants to retain the modified socket was significantly higher than that for the TSB socket after the trial period ( P = 0.03).</p><p><strong>Conclusion: </strong>The modified socket design may offer advantages by providing improved rotational control during walking and reducing local pressure on the anterodistal tibia and fibula head. In addition, it maintains the total surface contact concept.</p>","PeriodicalId":49657,"journal":{"name":"Prosthetics and Orthotics International","volume":" ","pages":"392-400"},"PeriodicalIF":1.4,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13440531/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145835161","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}

{"title":"Analysis of the weight-transfer mechanism through forward velocity of the combined center of pressure during the loading response in individuals with unilateral transtibial amputation.","authors":"Yusuke Nakagiri, Sumiko Yamamoto","doi":"10.1097/PXR.0000000000000488","DOIUrl":"10.1097/PXR.0000000000000488","url":null,"abstract":"<p><strong>Background: </strong>The dynamic stability during forward propulsion in the stance phase of prosthetic gait can be quantified using the center of pressure (COP). Although previous studies focused primarily on the single-limb support phase, COP movement during the double-limb support phase remains unclear.</p><p><strong>Objective: </strong>This study quantitatively analyzed the weight-transfer mechanism during gait by examining the forward velocity of the combined COP and the duration of the loading response (LR) on the prosthetic and intact sides.</p><p><strong>Method: </strong>This study conducted experiments involving 6 individuals with unilateral transtibial amputation and 11 able-bodied individuals. The participants were instructed to walk at 3 different speeds, and data were collected under each condition, using a 3D motion capture system. The peak value and timing of the forward velocity of combined COP in the LR were compared between the prosthetic and intact sides.</p><p><strong>Result: </strong>Regarding the forward velocity of the combined COP in the prosthetic-side LR, the peak value was smaller at slow walking speeds and the peak timing tended to be delayed under all walking-speed conditions compared with the intact-side LR. These parameters during the prosthetic-side LR were similar to those of able-bodied individuals. Analysis of the LR duration revealed no consistent trend in the relative durations of the prosthetic-side LR and intact-side LR.</p><p><strong>Conclusions: </strong>The results of this study suggest that individuals with unilateral transtibial amputation may employ a characteristic movement strategy during intact-side LR while the prosthetic side is in the pre-swing phase.</p>","PeriodicalId":49657,"journal":{"name":"Prosthetics and Orthotics International","volume":" ","pages":"418-425"},"PeriodicalIF":1.4,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145294284","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}

{"title":"Enhancing independence: Experiences of lower limb prosthesis users.","authors":"Vegar Hjermundrud, Ingvild Kjeken, Terje Gjøvaag","doi":"10.1097/PXR.0000000000000505","DOIUrl":"10.1097/PXR.0000000000000505","url":null,"abstract":"<p><strong>Background: </strong>An aging society and the rise in peripheral arterial disease and diabetes mellitus generate a high prevalence of lower limb loss. Medical advancements extend lifespans and make effective rehabilitation necessary to preserve long-time mobility and independence. This study aims to explore the experiences of long-term prosthesis users, investigating the factors influencing their prosthetic mobility and the resulting impact on independence.</p><p><strong>Methods: </strong>Experienced prosthesis users were recruited from rehabilitation clinics and orthopedic companies and participated in focus group interviews. These interviews were transcribed verbatim and analyzed by systematic text condensation to identify themes.</p><p><strong>Results: </strong>Two main themes were identified: \"The Goal of Prosthetic Mobility is Independence\" and \"Lack of Knowledge Threatens Mobility.\" Prosthesis users highly value independence, with prostheses being crucial for enabling freedom without reliance on others. However, this independence is fragile, as even minor issues concerning prosthetic components or impairments can affect mobility and independence. Health care professionals were often described as lacking in specialized knowledge in the complexities of long-time prosthetic care, which limits their support for prosthesis users. At the same time, peer expertise is highly valued for practical advice. Integrating peer expertise into education and rehabilitation programs appears essential for improving care.</p><p><strong>Conclusions: </strong>The findings suggest a knowledge gap among health professionals that may threaten the mobility and independence of experienced prosthesis users. Although users develop their practical competence and skills by prosthetic use, health professionals make slight use of the opportunities to enhance their competence by listening to and collaborating with prosthesis users. By recognizing patients as experts in their bodies, their insights can complement and strengthen professional competence and lead to more effective rehabilitation.</p>","PeriodicalId":49657,"journal":{"name":"Prosthetics and Orthotics International","volume":" ","pages":"367-374"},"PeriodicalIF":1.4,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145662513","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}

{"title":"Quantifying dynamic coupling and fit degeneration of transtibial prosthetics using 3D motion capture.","authors":"Sean S Cullen, Ruth E Mackay, Amir A Mohagheghi, Xinli Du","doi":"10.1097/PXR.0000000000000476","DOIUrl":"10.1097/PXR.0000000000000476","url":null,"abstract":"<p><strong>Background: </strong>Assessing the fit and suitability of lower limb prosthetics is heavily reliant upon clinician observation and subjective feedback, often resulting in negative impacts on the comfort and quality of life of amputees. This is particularly important in the early stages of new socket fitment.</p><p><strong>Objective: </strong>This paper aims to use optoelectronic motion capture to measure the 5 degree of freedom coupling effectiveness of a newly fitted prosthetic limb during the adjustment period (6 weeks) of an active transtibial amputee.</p><p><strong>Methods: </strong>A 2-part calibration and trial data collection system was employed using Qualisys 3D motion capture, to track the relative position of limb and socket during walking trials. A single active transtibial amputee (27 male) was fitted with a new prosthetic socket and attended weekly data capture sessions using their prosthesis normally.</p><p><strong>Results: </strong>Here, we present evidence for alteration in prosthesis-residuum coupling performance, notably, the average proximal/distal displacement (pistoning) increased from 3.36 to 10.60 mm at week 6 from the first fit, which further increased to 12.90 mm with the use of a single prosthetic sock. Participant reported Socket Comfort Score reduced from 9 to 7 during this time.</p><p><strong>Conclusions: </strong>This pilot study provides new insight into the dynamic behavior of prosthetic sockets and could form the basis for larger studies determining a framework for safe and comfortable coupling limits.</p>","PeriodicalId":49657,"journal":{"name":"Prosthetics and Orthotics International","volume":" ","pages":"385-391"},"PeriodicalIF":1.4,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144762109","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}