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Journal articles on the topic 'Ankle-foot prosthesis'

Author: Grafiati

Published: 4 June 2021

Last updated: 5 February 2022

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1

De Pauw, Kevin, Pierre Cherelle, Bart Roelands, Dirk Lefeber, and Romain Meeusen. "The efficacy of the Ankle Mimicking Prosthetic Foot prototype 4.0 during walking: Physiological determinants." Prosthetics and Orthotics International 42, no. 5 (2018): 504–10. http://dx.doi.org/10.1177/0309364618767141.

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Background: Evaluating the effectiveness of a novel prosthetic device during walking is an important step in product development. Objective: To investigate the efficacy of a novel quasi-passive ankle prosthetic device, Ankle Mimicking Prosthetic Foot 4.0, during walking at different speeds, using physiological determinants in transtibial and transfemoral amputees. Study design: Nonrandomized crossover design for amputees. Methods: Six able-bodied subjects, six unilateral transtibial amputees, and six unilateral transfemoral amputees underwent a 6-min walk test at normal speed, followed by seri

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Naseri, Amirreza, Majid Mohammadi Moghaddam, Mohammad Gharini, and Maziar Ahmad Sharbafi. "A Novel Adjustable Damper Design for a Hybrid Passive Ankle Prosthesis." Actuators 9, no. 3 (2020): 74. http://dx.doi.org/10.3390/act9030074.

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Specifications of actuators when interacting with biological systems such as the human body are entirely different from those used in industrial machines or robots. One important instance of such applications is assistive devices and prostheses. Among various approaches in designing prostheses, recently, semi-active systems attracted the interest of researchers. Even more, some commercial systems benefit from designs such as implementing an adjustable damper in the ankle prosthesis to increase range of motion. The main reason for adding damper is to assist amputees’ walking locomotion on slope

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3

Cohen-Sobel, E., MA Caselli, and J. Rizzuto. "Prosthetic management of a Chopart amputation variant." Journal of the American Podiatric Medical Association 84, no. 10 (1994): 505–10. http://dx.doi.org/10.7547/87507315-84-10-505.

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The history and prosthetic difficulties of a patient with an unusual Chopart amputation variant have been presented. Although it is possible for the Chopart amputee to walk with just a shoe and filler, this patient does best with a formal prosthesis. The Chopart amputation, which has been surgically stabilized with Achilles tendon lengthening to prevent equinus contractures, can be fitted successfully with a lightweight circumferential plastic or silicone prosthesis or more traditionally with a solid ankle foot orthosis with filler. This partial foot prosthesis is worn with a sturdy shoe with

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4

Au, Samuel, and Hugh Herr. "Powered ankle-foot prosthesis." IEEE Robotics & Automation Magazine 15, no. 3 (2008): 52–59. http://dx.doi.org/10.1109/mra.2008.927697.

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5

Russell Esposito, Elizabeth, Jennifer M. Aldridge Whitehead, and Jason M. Wilken. "Step-to-step transition work during level and inclined walking using passive and powered ankle–foot prostheses." Prosthetics and Orthotics International 40, no. 3 (2015): 311–19. http://dx.doi.org/10.1177/0309364614564021.

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Background: Individuals with leg amputations who use passive prostheses have greater metabolic demands than non-amputees likely due to limited net positive work compared to a biological ankle. New powered ankle–foot prostheses can perform net positive mechanical work to aid push-off capabilities, which may reduce metabolic demands. Objectives: Compare step-to-step transition work and metabolic demand during level and inclined walking using passive and powered ankle-foot prostheses. Study Design: Repeated measures. Methods: Six individuals with transtibial amputation and six able-bodied control

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Herr, Hugh M., and Alena M. Grabowski. "Bionic ankle–foot prosthesis normalizes walking gait for persons with leg amputation." Proceedings of the Royal Society B: Biological Sciences 279, no. 1728 (2011): 457–64. http://dx.doi.org/10.1098/rspb.2011.1194.

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Over time, leg prostheses have improved in design, but have been incapable of actively adapting to different walking velocities in a manner comparable to a biological limb. People with a leg amputation using such commercially available passive-elastic prostheses require significantly more metabolic energy to walk at the same velocities, prefer to walk slower and have abnormal biomechanics compared with non-amputees. A bionic prosthesis has been developed that emulates the function of a biological ankle during level-ground walking, specifically providing the net positive work required for a ran

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Safaeepour, Zahra, Ali Esteki, Farhad Tabatabai Ghomshe, and Mohammad E. Mousavai. "Design and development of a novel viscoelastic ankle-foot prosthesis based on the human ankle biomechanics." Prosthetics and Orthotics International 38, no. 5 (2014): 400–404. http://dx.doi.org/10.1177/0309364613505108.

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Background and aim: In the present study, a new approach was applied to design and develop a viscoelastic ankle-foot prosthesis. The aim was to replicate the intact ankle moment–angle loop in the normal walking speed. Technique: The moment–angle loop of intact ankle was divided into four parts, and the appropriate models including two viscoelastic units of spring-damper mechanism were considered to replicate the passive ankle dynamics. The developed prototype was then tested on a healthy subject with the amputee gait simulator. The result showed that prosthetic ankle moment–angle loop was simi

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8

Verheul, Floor Jacoba Marie-Georgette, Olaf Verschuren, Maremka Zwinkels, et al. "Effectiveness of a crossover prosthetic foot in active children with a congenital lower limb deficiency: an explorative study." Prosthetics and Orthotics International 44, no. 5 (2020): 305–13. http://dx.doi.org/10.1177/0309364620912063.

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Background: Children with lower limb prostheses cannot always keep up with their peers during active play. A pediatric crossover foot may be a promising prosthetic alternative for children engaging in high-intensity movements necessary for active play. Objectives: To compare children’s walking performance, running performance, experienced competence, and cosmesis using their prescribed prosthesis compared with the crossover foot. Study Design: Pretest-posttest study. Methods: Children with lower limb amputation or deficiency were recruited. Measurements were taken at baseline with the prescrib

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Sedki, Imad, and Raymond Moore. "Patient evaluation of the Echelon foot using the Seattle Prosthesis Evaluation Questionnaire." Prosthetics and Orthotics International 37, no. 3 (2012): 250–54. http://dx.doi.org/10.1177/0309364612458448.

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Background: The introduction of the Echelon prosthetic foot with a hydraulic self-aligning ankle adds improved adaptability to varied terrains and uneven walking surfaces. However, the specific indications for prescribing such components and the potential benefits are yet to be fully established. Case Description and Methods: Nine amputees including three bilateral amputees evaluated their standard prostheses using the Seattle Prosthesis Evaluation Questionnaire. They were then provided with Echelon feet, and they evaluated them after 4 weeks of use. Findings and Outcomes: Improved satisfactio

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Mulder, Inge A., Herman R. Holtslag, Leonardus FA Beersma, and Bart FJM Koopman. "Keep moving forward: A new energy returning prosthetic device with low installation height after Syme or Pirogoff amputation." Prosthetics and Orthotics International 38, no. 1 (2013): 12–20. http://dx.doi.org/10.1177/0309364613485112.

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Background:The incidence of foot amputations increased in the Netherlands to 3.3/100,000 people up to 1994. Despite these numbers, only a few basic prosthetic and orthotic devices are available, and all lack functionality to restore ankle and foot mobility.Objectives:The aim of this explorative study was to design and test a unique prosthesis for Syme or Pirogoff amputees with the necessary low installation height but restoring ankle and foot mobility.Study design:A case study was performed.Methods:The new prosthesis was designed and numerically analyzed on aspects concerning strength and defo

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11

Montgomery, Jana R., and Alena M. Grabowski. "Use of a powered ankle–foot prosthesis reduces the metabolic cost of uphill walking and improves leg work symmetry in people with transtibial amputations." Journal of The Royal Society Interface 15, no. 145 (2018): 20180442. http://dx.doi.org/10.1098/rsif.2018.0442.

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People with transtibial amputations (TTAs) who use a powered ankle–foot prosthesis have equivalent metabolic costs and step-to-step transition work for level-ground walking over a range of speeds compared to non-amputees. The effects of using a powered compared to passive-elastic prosthesis for sloped walking are unknown. We sought to understand how the use of passive-elastic compared to powered ankle–foot prostheses affect metabolic cost and step-to-step transition work during sloped walking. Ten people (six M, four F) with TTAs walked 1.25 m s −1 at 0°, ±3°, ±6° and ±9° using their own passi

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Wurdeman, Shane R., Phillip M. Stevens, and James H. Campbell. "Mobility analysis of AmpuTees (MAAT 5): Impact of five common prosthetic ankle-foot categories for individuals with diabetic/dysvascular amputation." Journal of Rehabilitation and Assistive Technologies Engineering 6 (January 2019): 205566831882078. http://dx.doi.org/10.1177/2055668318820784.

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Introduction Diabetes and vascular disease represent the most common etiologies for lower limb amputations. In lower limb loss rehabilitation, the prosthetic ankle-foot mechanism is the most common major component needed to restore function. The purpose of this study was to examine the impact of five common prosthetic ankle-foot mechanisms on functional mobility in a large sample of individuals with amputation due to diabetes/dysvascular disease. Methods A retrospective analysis of the Prosthetic Limb Users' Survey of Mobility (PLUS-M®) captured in the patient care setting. A total of 738 indi

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Alleva, Stefano, Michele Gabrio Antonelli, Pierluigi Beomonte Zobel, and Francesco Durante. "Biomechanical Design and Prototyping of a Powered Ankle-Foot Prosthesis." Materials 13, no. 24 (2020): 5806. http://dx.doi.org/10.3390/ma13245806.

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Powered ankle-foot prostheses for walking often have limitations in the range of motion and in push-off power, if compared to a lower limb of a healthy person. A new design of a powered ankle-foot prosthesis is proposed to obtain a wide range of motion and an adequate power for a push-off step. The design methodology for this prosthesis has three points. In the first one, a dimensionless kinematic model of the lower limb in the sagittal plane is built, through an experimental campaign with healthy subjects, to calculate the angles of lower limb during the gait. In the second point a multibody

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Lacraz, Alain, Stéphane Armand, Katia Turcot, et al. "Comparison of the Otto Bock solid ankle cushion heel foot with wooden keel to the low-cost CR-Equipements™solid ankle cushion heel foot with polypropylene keel: A randomized prospective double-blind crossover study assessing patient satisfaction and energy expenditure." Prosthetics and Orthotics International 41, no. 3 (2016): 258–65. http://dx.doi.org/10.1177/0309364616677649.

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Background:The International Committee of the Red Cross supports a worldwide program of prosthetic fitting and rehabilitation. In this context, a prosthetic foot was developed and widely distributed in least developed countries.Study design:Prospective, randomized, double-blind, controlled study.Objective:To compare patient satisfaction and energy expenditure during ambulation between a low-cost prosthetic foot designed with a polypropylene keel (CR-Equipements™solid ankle cushion heel, International Committee of the Red Cross) to a well-recognized solid ankle cushion heel foot with a wooden k

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Endo, Ken, and Hugh Herr. "1P1-J13 A Powered Ankle-foot Prosthesis with an Artificial Gastrocnemius." Proceedings of JSME annual Conference on Robotics and Mechatronics (Robomec) 2009 (2009): _1P1—J13_1—_1P1—J13_2. http://dx.doi.org/10.1299/jsmermd.2009._1p1-j13_1.

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Markowitz, Jared, Pavitra Krishnaswamy, Michael F. Eilenberg, Ken Endo, Chris Barnhart, and Hugh Herr. "Speed adaptation in a powered transtibial prosthesis controlled with a neuromuscular model." Philosophical Transactions of the Royal Society B: Biological Sciences 366, no. 1570 (2011): 1621–31. http://dx.doi.org/10.1098/rstb.2010.0347.

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Control schemes for powered ankle–foot prostheses would benefit greatly from a means to make them inherently adaptive to different walking speeds. Towards this goal, one may attempt to emulate the intact human ankle, as it is capable of seamless adaptation. Human locomotion is governed by the interplay among legged dynamics, morphology and neural control including spinal reflexes. It has been suggested that reflexes contribute to the changes in ankle joint dynamics that correspond to walking at different speeds. Here, we use a data-driven muscle–tendon model that produces estimates of the acti

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Debta, Sanghamitra, and Kaushik Kumar. "Design and Analysis of Powered Ankle-Foot Mechanism Using Hydraulic System." Applied Mechanics and Materials 877 (February 2018): 384–90. http://dx.doi.org/10.4028/www.scientific.net/amm.877.384.

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Currently available foot prosthesis model are more than 50 in number. In order to perform some extraordinary errands, for example, strolling, moving, cycling, golfing, swimming, snow skiing or running they are employed. Many are waterproof and made of lightweight materials, for example, plastic, metal combinations and carbon-fiber composites. Prosthetic feet can be essential (unmoving), explained (moving in at least one bearings), or element reaction (putting away and returning vitality when strolling, giving a feeling of "pushing off," much like the human foot). However there are certain prob

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McNealy, Lexyne L., and Steven A. Gard. "Effect of prosthetic ankle units on the gait of persons with bilateral trans-femoral amputations." Prosthetics and Orthotics International 32, no. 1 (2008): 111–26. http://dx.doi.org/10.1080/02699200701847244.

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In able-bodied individuals, the ankle joint functions to provide shock absorption, aid in foot clearance during the swing phase, and provides a rocker mechanism during stance phase to facilitate forward progression of the body. Prosthetic ankles currently used by persons with lower limb amputations provide considerably less function than their anatomical counterparts. However, increased ankle motion in the sagittal plane may improve the gait of persons with lower limb amputations while providing a more versatile prosthesis. The primary aim of this study was to examine and quantify temporal-spa

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Eilenberg, Michael F., Jiun-Yih Kuan, and Hugh Herr. "Development and Evaluation of a Powered Artificial Gastrocnemius for Transtibial Amputee Gait." Journal of Robotics 2018 (2018): 1–15. http://dx.doi.org/10.1155/2018/5951965.

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Existing robotic transtibial prostheses provide only ankle joint actuation and do not restore biarticular function of the gastrocnemius muscle. This paper presents the first powered biarticular transtibial prosthesis, which is a combination of a commercial powered ankle-foot prosthesis and a motorized robotic knee orthosis. The orthosis is controlled to emulate the human gastrocnemius based on neuromuscular models of matched nonamputees. Together with the ankle-foot prosthesis, the devices provide biarticular actuation. We evaluate differences between this biarticular condition and a monoartic

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Eilenberg, Michael F., Ken Endo, and Hugh Herr. "Biomechanic and Energetic Effects of a Quasi-Passive Artificial Gastrocnemius on Transtibial Amputee Gait." Journal of Robotics 2018 (2018): 1–12. http://dx.doi.org/10.1155/2018/6756027.

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State-of-the-art transtibial prostheses provide only ankle joint actuation and thus do not provide the biarticular function of the amputated gastrocnemius muscle. We develop a prosthesis that actuates both knee and ankle joints and then evaluate the incremental effects of this prosthesis as compared to ankle actuation alone. The prosthesis employs a quasi-passive clutched-spring knee orthosis, approximating the largely isometric behavior of the biological gastrocnemius, and utilizes a commercial powered ankle-foot prosthesis for ankle joint functionality. Two participants with unilateral trans

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Curran, Sarah A., and David K. Lyle. "Adaptive Sports Ankle Prosthetics." Prosthetics and Orthotics International 36, no. 3 (2012): 370–75. http://dx.doi.org/10.1177/0309364612453249.

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Participating in sport at all levels is gaining a dedicated following and this is also apparent in individuals with an amputation. Currently, there is a wide variety of ankle prostheses available which attempt to provide function, control, and comfort, as well as good aesthetic appeal. Participation in sport, however, increases the demands placed upon ankle prostheses. This can compromise function and performance, and constrain the opportunities of participation in various outdoor and water sports. In acknowledging this limitation and the need to develop more versatile ankle prostheses, this a

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Abdelaal, Osama, Saied Darwish, Khaled Abd Elmougoud, and Saleh Aldahash. "A new methodology for design and manufacturing of a customized silicone partial foot prosthesis using indirect additive manufacturing." International Journal of Artificial Organs 42, no. 11 (2019): 645–57. http://dx.doi.org/10.1177/0391398819847682.

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The production of customized prostheses for the foot and ankle still relies on slow and laborious steps of the traditional plaster molding fabrication techniques. Additive manufacturing techniques where three-dimensional objects can be constructed directly based on the object’s computer-aided-design data in a layerwise manner has opened the door to new opportunities for manufacturing of novel and personalized medical devices. The purpose of the present study was to develop a new methodology for design and manufacturing of a customized silicone partial foot prosthesis via an indirect additive m

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Cherelle, Pierre, Karen Junius, Victor Grosu, Heidi Cuypers, Bram Vanderborght, and Dirk Lefeber. "The AMP-Foot 2.1 : actuator design, control and experiments with an amputee." Robotica 32, no. 8 (2014): 1347–61. http://dx.doi.org/10.1017/s026357471400229x.

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SUMMARYThe Ankle Mimicking Prosthetic (AMP-) Foot 2 is a new energy efficient, powered transtibial prosthesis mimicking intact ankle behavior. The author's research is focused on the use of a low power actuator which stores energy in springs during the complete stance phase. At push-off, this energy can be released hereby providing propulsion forces and torques to the amputee. With the use of the so-called catapult actuator, the size and weight of the drive can be decreased compared to state-of-the-art powered prostheses, while still providing the full power necessary for walking.In this artic

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Harnroongroj, Thos. "The Talar Body Prosthesis Treated End Stage Ankle Arthrosis." Foot & Ankle Orthopaedics 2, no. 3 (2017): 2473011417S0001. http://dx.doi.org/10.1177/2473011417s000189.

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Category: Ankle Arthritis Introduction/Purpose: Ankle arthrosis creates patient disability. Ankle arthrodesis is treatment of choice which creates ankle stiffness and arthrosis of neighboring joints. Total ankle replacement can preserve ankle motions but the results at mid and long- term follow up needed further evaluation. Talar body prosthesis (TBP) can provide long-term satisfactory foot-ankle function of the ankle sustaining talar body damages. Due to ankle biomechanics is different to hip and knee joints. So, we inserted TBP for treating end stage ankle arthrosis. The present study evalua

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Hwang, Yeokgu, Kwang Hwan Park, Seung Hwan Han, and Jin Woo Lee. "Long-Term Outcomes of Total Ankle arthroplasty with mobile bearing in 124 ankles, Over eight years of follow-up." Foot & Ankle Orthopaedics 3, no. 3 (2018): 2473011418S0025. http://dx.doi.org/10.1177/2473011418s00258.

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Category: Ankle Arthritis Introduction/Purpose: Total ankle arthroplasty (TAA) is increasingly recommended for patients with end-stage ankle osteoarthritis. However, there were few studies which had investigated long-term clinical outcomes with mobile baering system. We analyzed the patient reported results of 124 arthroplasties performed with one type of three-component total ankle prosthesis. This prospective cohort study analyzed long-term outcomes of total ankle arthroplasty with use of the Hintegra prosthesis at one center. Methods: Consecutive patients who received the hintegra prosthesi

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Abbott, Emily M., Zoe Merchant, Erica Lee, et al. "Evaluation of True Ankle Motion Following Total Ankle Replacement Utilizing XROMM technology." Foot & Ankle Orthopaedics 5, no. 4 (2020): 2473011420S0001. http://dx.doi.org/10.1177/2473011420s00017.

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Category: Ankle Arthritis Introduction/Purpose: Total ankle replacement (TAR) is common tool used by the foot and ankle specialist to treat end stage ankle arthritis. Current data about ankle motion following TAR is derived from gait analysis utilizing external markers. Utilizing Xray Reconstruction of Moving Morphology (XROMM), which combines 3-D mapping technology with biplanar fluoroscopy in vivo to visualize true skeletal motion, we can evaluate true motion of TAR implants. Current TAR replacement systems are either mobile bearing or fixed bearing. We hypothesized that subjects implanted w

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Au, S. K., J. Weber, and H. Herr. "Powered Ankle--Foot Prosthesis Improves Walking Metabolic Economy." IEEE Transactions on Robotics 25, no. 1 (2009): 51–66. http://dx.doi.org/10.1109/tro.2008.2008747.

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28

Quesada, P. M., M. Pitkin, and J. Colvin. "Biomechanical evaluation of a prototype foot/ankle prosthesis." IEEE Transactions on Rehabilitation Engineering 8, no. 1 (2000): 156–59. http://dx.doi.org/10.1109/86.830960.

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Koehler-McNicholas, Sara R., Billie C. Savvas Slater, Karl Koester, Eric A. Nickel, John E. Ferguson, and Andrew H. Hansen. "Bimodal ankle-foot prosthesis for enhanced standing stability." PLOS ONE 13, no. 9 (2018): e0204512. http://dx.doi.org/10.1371/journal.pone.0204512.

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Heidarzadeh, Siamak, Mojtaba Sharifi, Hassan Salarieh, and Aria Alasty. "A Novel Robust Model Reference Adaptive Impedance Control Scheme for an Active Transtibial Prosthesis." Robotica 37, no. 9 (2019): 1562–81. http://dx.doi.org/10.1017/s0263574719000146.

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SummaryIn this paper, a novel robust model reference adaptive impedance control (RMRAIC) scheme is presented for an active transtibial ankle prosthesis. The controller makes the closed loop dynamics of the prosthesis similar to a reference impedance model and provides asymptotic tracking of the response trajectory of this impedance model. The interactions between human and prosthesis are taken into account by designing a second-order reference impedance model. The proposed controller is robust against parametric uncertainties in the nonlinear dynamic model of the prosthesis. Also, the controll

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Schipper, Oliver, Steven Haddad, and Alexander Van den Avont. "Outcomes of Revision Ankle Arthroplasty using a Fixed-bearing, Stemmed Intramedullary Prosthesis." Foot & Ankle Orthopaedics 2, no. 3 (2017): 2473011417S0003. http://dx.doi.org/10.1177/2473011417s000357.

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Category: Ankle, Ankle Arthritis Introduction/Purpose: As in all total joint arthroplasty, longevity is finite, and the need for predictable revision surgery is mandatory. Literature is sparse describing revision total ankle arthroplasty (TAA) feasibility and outcomes. Revision total ankle arthroplasty involving implant exchange remains in its infancy, making critical assessment of outcomes necessary to guide future treatment options. The purpose of this study was to analyze the clinical outcomes of revision TAA using a minimum 2-year follow-up to evaluate for early failure and outcomes. Metho

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Dongo, Tafadzwa, Benard W. Ikua, Daniel Nyamongo Sagwe, and Elliot J. Rouse. "Development of a Passive Ankle Foot Prosthesis with Manually Adjustable Ankle Stiffness." Open Journal of Therapy and Rehabilitation 07, no. 04 (2019): 131–39. http://dx.doi.org/10.4236/ojtr.2019.74009.

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Brackx, Branko, Michaël Van Damme, Arnout Matthys, Bram Vanderborght, and Dirk Lefeber. "Passive Ankle-Foot Prosthesis Prototype with Extended Push-Off." International Journal of Advanced Robotic Systems 10, no. 2 (2013): 101. http://dx.doi.org/10.5772/55170.

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Debta, Sanghamitra, and Kaushik Kumar. "Biomedical Design of Powered Ankle- Foot Prosthesis – A Review." Materials Today: Proceedings 5, no. 2 (2018): 3273–82. http://dx.doi.org/10.1016/j.matpr.2017.11.569.

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Paradisi, Francesco, Anna Sofia Delussu, Stefano Brunelli, et al. "The Conventional Non-Articulated SACH or a Multiaxial Prosthetic Foot for Hypomobile Transtibial Amputees? A Clinical Comparison on Mobility, Balance, and Quality of Life." Scientific World Journal 2015 (2015): 1–10. http://dx.doi.org/10.1155/2015/261801.

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The effects of a non-articulated SACH and a multiaxial foot-ankle mechanism on the performance of low-activity users are of great interest for practitioners in amputee rehabilitation. The aim of this study is to compare these two prosthetic feet and assess possible improvements introduced by the increased degrees of freedom provided by the multiaxial foot. For this purpose, a group of 20 hypomobile transtibial amputees (TTAs) had their usual SACH replaced with a multiaxial foot. Participants’ functional mobility, involving ambulatory skills in overground level walking, ramps, and stairs, was e

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Hansen, Andrew. "Effects of Alignment on the Roll-Over Shapes of Prosthetic Feet." Prosthetics and Orthotics International 32, no. 4 (2008): 390–402. http://dx.doi.org/10.1080/03093640802366158.

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Recent work suggests that a prosthetic ankle-foot component's roll-over shape – the effective rocker it conforms to between initial contact and opposite initial contact (the ‘roll-over’ interval of walking) – is closely linked to its final alignment in the prosthesis (as determined by a skilled prosthetist using heuristic techniques). If true, this information may help to determine the appropriate alignment for a lower limb prosthesis before it is built, or a priori. Knowledge is needed for future models that will incorporate the roll-over shape including the relative effect of alignment on th

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Hansen, Andrew H., Margrit R. Meier, Pinata H. Sessoms, and Dudley S. Childress. "The Effects of Prosthetic Foot Roll-Over Shape Arc Length on the Gait of Trans-Tibial Prosthesis Users." Prosthetics and Orthotics International 30, no. 3 (2006): 286–99. http://dx.doi.org/10.1080/03093640600816982.

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The Shape&Roll prosthetic foot was used to examine the effect of roll-over shape arc length on the gait of 14 unilateral trans-tibial prosthesis users. Simple modifications to the prosthetic foot were used to alter the effective forefoot rocker length, leaving factors such as alignment, limb length, and heel and mid-foot characteristics unchanged. Shortening the roll-over shape arc length caused a significant reduction in the maximum external dorsiflexion moment on the prosthetic side at all walking speeds ( p < 0.001 for main effect of arc length), due to a reduction in forefoot levera

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Sanders, Michael, Anton E. Bowden, Spencer Baker, Ryan Jensen, McKenzie Nichols, and Matthew K. Seeley. "The Influence of Ambulatory Aid on Lower-Extremity Muscle Activation During Gait." Journal of Sport Rehabilitation 27, no. 3 (2018): 230–36. http://dx.doi.org/10.1123/jsr.2016-0148.

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Context: Foot and ankle injuries are common and often require a nonweight-bearing period of immobilization for the involved leg. This nonweight-bearing period usually results in muscle atrophy for the involved leg. There is a dearth of objective data describing muscle activation for different ambulatory aids that are used during the aforementioned nonweight-bearing period. Objective: To compare activation amplitudes for 4 leg muscles during (1) able-bodied gait and (2) ambulation involving 3 different ambulatory aids that can be used during the acute phase of foot and ankle injury care. Design

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Darter, Benjamin J., and Jason M. Wilken. "Energetic consequences of using a prosthesis with adaptive ankle motion during slope walking in persons with a transtibial amputation." Prosthetics and Orthotics International 38, no. 1 (2013): 5–11. http://dx.doi.org/10.1177/0309364613481489.

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Background:Technological advances in prosthetic design include the use of microprocessors that adapt device performance based on user motion. The Proprio ankle unit prepositions the foot to adjust for walking on slopes and increases foot clearance during swing to minimize gait deviations.Study design:Comparative analysis.Objectives:To investigate the effect of a prosthesis with adaptive ankle motion on physiological gait performance during slope walking.Methods:Six persons with a unilateral transtibial amputation completed treadmill walking tests at three slopes (−5°, 0°, and 5°). The particip

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Lisboa Neto, Waldo Campos, Marco Túlio Costa, and Ricardo Cardenuto Ferreira. "Preliminary short-term results of ankle arthroplasty with the Taric® prosthesis." Journal of the Foot & Ankle 14, no. 1 (2020): 29–35. http://dx.doi.org/10.30795/jfootankle.2020.v14.1132.

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Objective: Present the clinical and functional outcome of the first five ankle arthroplasties performed in our department. Methods: Five patients (five feet) with secondary arthrosis of the ankle underwent ankle arthroplasty with the Taric® prosthesis. Average age at the time of surgery was 42 years. Follow-up time averaged 43 months. We recorded the immediate postoperative complications. For clinical evaluation we used the VAS pain scale, the AOFAS hindfoot and ankle scale, and the Foot Function Index. We measured the leg-foot range of motion. On the radiographs, we measured the alpha, beta,

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Xiaojun, Liang, and Zhao Hong-Mou. "Short-Term Effect of the INBONE II Total Ankle Arthroplasty in the Treatment of End-Stage Ankle Arthritis." Foot & Ankle Orthopaedics 5, no. 4 (2020): 2473011420S0050. http://dx.doi.org/10.1177/2473011420s00501.

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Category: Ankle Arthritis Introduction/Purpose: To study the short-term effect of the INBONE II total ankle arthroplasty in the treatment of end-stage ankle arthritis, and to analyze the main operation points and complications. Methods: A total of 10 patients who used INBONE II for total ankle replacement in my Center from March 2016 to June 2017 were retrospective analyzed, including 2 patients who have a subtalar joint fusion at the same time. The VAS pain score and the American Orthopaedic Foot & Ankle Society (AOFAS) scores were used to evaluate the clinical efficacy. Results: All the

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Thermann, Hajo. "Total Ankle Arthroplasty: Why does it fail?" Journal of Foot and Ankle Surgery (Asia Pacific) 1, no. 2 (2014): 41–47. http://dx.doi.org/10.5005/jp-journals-10040-1010.

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ABSTRACT Over the past 10 years, total ankle arthroplasty (TAA) has been established as an alternative to treat osteoarthritis of the ankle. In this review, problems occurring after TAA will be analyzed and solutions presented. Furthermore, my own 18 years experience regarding the failure or poor success of a TAA implantation will be illustrated. The range of revision options from leaving the prosthesis to a complete modification as well as the explantation with subsequent arthrodesis will be presented algorithmically. Another problem of the poor success of prosthetic implants exists in the fl

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Shepherd, Max K., and Elliott J. Rouse. "The VSPA Foot: A Quasi-Passive Ankle-Foot Prosthesis With Continuously Variable Stiffness." IEEE Transactions on Neural Systems and Rehabilitation Engineering 25, no. 12 (2017): 2375–86. http://dx.doi.org/10.1109/tnsre.2017.2750113.

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Debta, Sanghamitra, and Kaushik Kumar. "Static Structural Analysis of a Powered Ankle Foot Prosthesis Mechanism." Materials Today: Proceedings 5, no. 5 (2018): 11616–21. http://dx.doi.org/10.1016/j.matpr.2018.02.131.

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Fylstra, Bretta L., I.-Chieh Lee, Stephanie Huang, Andrea Brandt, Michael D. Lewek, and He (Helen) Huang. "Human-prosthesis coordination: A preliminary study exploring coordination with a powered ankle-foot prosthesis." Clinical Biomechanics 80 (December 2020): 105171. http://dx.doi.org/10.1016/j.clinbiomech.2020.105171.

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Marencakova, Jitka, Tomas Gryc, and Frantisek Zahalka. "THE EFFECT OF SPEED ON GAIT ASYMMETRY IN SUBJECT WITH CONGENITAL TIBIAL DEFICIENCY: A CASE STUDY." Lékař a technika - Clinician and Technology 49, no. 4 (2020): 112–18. http://dx.doi.org/10.14311/ctj.2019.4.02.

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In the case study, gait asymmetry changes in different speed of walking with ankle-foot prosthesis were identified for developmental tibial deficiency. Joint kinematic, spatial-temporal, and kinetic gait parameters were collected using 3D motion capture system and 3D treadmill simultaneously. Mean values, SD, and symmetry index were calculated for selected gait parameters and descriptively analysed. Results show gait asymmetry of all of the measured parameters. Kinematic joint angular ranges increase with increasing walking speed. Inverse dynamic results present changes in step length and dura

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Agrawal, Vibhor, Robert Gailey, Christopher O’Toole, Ignacio Gaunaurd, and Adam Finnieston. "Influence of gait training and prosthetic foot category on external work symmetry during unilateral transtibial amputee gait." Prosthetics and Orthotics International 37, no. 5 (2013): 396–403. http://dx.doi.org/10.1177/0309364612473501.

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Background:Prosthetic foot prescription guidelines lack scientific evidence and are concurrent with an amputee’s concurrent with an amputee’s Medicare Functional Classification Level (K-Level) and categorization of prosthetic feet.Objective:To evaluate the influence of gait training and four categories of prosthetic feet (K1, K2, K3, and microprocessor ankle/foot) on Symmetry in External Work for K-Level-2 and K-Level-3 unilateral transtibial amputees.Design:Randomized repeated-measures trial.Methods:Five K-Level-2 and five K-Level-3 subjects were tested in their existing prosthesis during Ses

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Kaib, T., J. Schäfer, J. Block, et al. "Biomechanical analysis of stair ascent in persons with Chopart amputation." Prosthetics and Orthotics International 44, no. 3 (2020): 164–71. http://dx.doi.org/10.1177/0309364619900737.

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Background: Compared to walking on level ground, ascending stairs requires a large range of motion not only of the hip and knee joint, but also of the ankle joint. The prosthesis often worn by persons with partial foot amputation largely prevents the ankle motion needed during stair ascent. Objectives: Aim of this study was to assess subjects with a Chopart amputation utilizing a clamshell device during stair ascent to identify potential biomechanical deficits. Study design: Cross-sectional study with reference group. Methods: Six subjects with unilateral Chopart amputation and 17 unimpaired s

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Schlafly, Millicent, and Kyle B. Reed. "Novel passive ankle-foot prosthesis mimics able-bodied ankle angles and ground reaction forces." Clinical Biomechanics 72 (February 2020): 202–10. http://dx.doi.org/10.1016/j.clinbiomech.2019.12.016.

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Rachmat, Nur, and Herawati Priangi . "STUDI KASUS : GAMBARAN DIRI PASIEN AMPUTASI COPART PROSTHESIS AKIBAT TRAUMA KECELAKAN UNTUK PASIEN AMPUTASI ANKLE." Jurnal Sehat Mandiri 14, no. 1 (2019): 18–28. http://dx.doi.org/10.33761/jsm.v14i1.87.

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Direct accidents are accidents that result in defects or damage to limbs that lead to amputation. While indirect accidents are accidents which cause one aspect of life to be disturbed, especially on economic and social aspects. Individuals who experience a traumatic event will experience different reactions whether they become worse with the conditions they experience or the individual is able to adjust to the conditions they face and rise from adversity or become strong in the face of these traumatic events. Adjustments that can make individuals able to return to normal life or become better.

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