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biomechanics, foot

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https://www.readbyqxmd.com/read/28634682/searching-for-the-sweet-spot-the-foot-rotation-and-parallel-engagement-of-ankle-ligaments-in-maximizing-injury-tolerance
#1
Bingbing Nie, Jason L Forman, Alexander R Mait, John-Paul Donlon, Matthew B Panzer, Richard W Kent
Ligament sprains, defined as tearing of bands of fibrous tissues within ligaments, account for a majority of injuries to the foot and ankle complex in field-based sports. External rotation of the foot is considered the primary injury mechanism of syndesmotic ankle sprains with concomitant flexion and inversion/eversion associated with particular patterns of ligament trauma. However, the influence of the magnitude and direction of loading vectors to the ankle on the in situ stress state of the ligaments has not been quantified in the literature...
June 20, 2017: Biomechanics and Modeling in Mechanobiology
https://www.readbyqxmd.com/read/28633785/the-lisfranc-amputation-a-more-reliable-level-of-amputation-with-proper-intraoperative-tendon-balancing
#2
Christopher J Greene, Christopher Bibbo
Traditional transmetatarsal amputations are a reliable level of amputation. However, amputations at the Lisfranc level have met with limited success owing to improper biomechanics resulting from tendon imbalance, ultimately leading to foot deformity positions and an unstable soft tissue envelope with ensuing skin breakdown, infection, and below-the-knee amputation. We describe proper tendon rebalancing that results in improved biomechanics and a more reliable and stable amputation at the more proximal Lisfranc level...
July 2017: Journal of Foot and Ankle Surgery: Official Publication of the American College of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/28633164/ann-prediction-of-ligament-stiffnesses-for-the-enhanced-predictive-ability-of-a-patient-specific-computational-foot-ankle-model
#3
Ruchi Chande, Jennifer S Wayne
Computational models of diarthrodial joints serve to inform the biomechanical function of these structures, and as such, must be supplied appropriate inputs for performance that is representative of actual joint function. Inputs for these models are sourced from both imaging modalities as well as literature. The latter is often the source of mechanical properties for soft tissues, like ligament stiffnesses; however, such data is not always available for all soft tissues nor is it known for patient specific work...
June 20, 2017: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/28632061/the-effect-of-unilateral-arm-swing-motion-on-lower-extremity-running-mechanics-associated-with-injury-risk
#4
Cristine Agresta, Christian R Ward, W Geoffrey Wright, Carole A Tucker
Many field sports involve equipment that restricts one or both arms from moving while running. Arm swing during running has been examined from a biomechanical and physiologic perspective but not from an injury perspective. Moreover, only bilateral arm swing suppression has been studied with respect to running. The purpose of this study was to determine the influence of running with one arm restrained on lower extremity mechanics associated with running or sport-related injury. Fifteen healthy participants ran at a self-selected speed with typical arm swing, with one arm restrained and with both arms restrained...
February 28, 2017: Sports Biomechanics
https://www.readbyqxmd.com/read/28617260/pes-planus-and-pes-cavus-in-southern-italy-a-5-years-study
#5
Gianmarco Troiano, Nicola Nante, Guglielmo Lucio Citarelli
INTRODUCTION: Baropodometrical digital techniques map the pressures exerted on the foot plant during both static and dynamic loadings. The study of the distribution of such pressures makes it possible to evaluate the postural and locomotory biomechanics together with its pathological variations. METHODS: From January 2011 to August 2016 we conducted a cross sectional study in order to diagnose flatfoot and hollowfoot through the baropodometric analysis, and collecting additional information such as gender and the age...
April 2017: Annali Dell'Istituto Superiore di Sanità
https://www.readbyqxmd.com/read/28594508/lateral-ankle-instability-and-peroneal-tendon-pathology
#6
Michael Isiah Sandlin, Cyrus E Taghavi, Timothy P Charlton, Richard D Ferkel
Surgeons should understand the anatomic, vascular, biomechanical, and predisposing factors related to lateral ankle instability and peroneal tendon injuries, including peroneal tendinitis and tenosynovitis, peroneal tendon tears and ruptures, as well as peroneal tendon subluxation and dislocation. Surgeons should understand the treatment options and recommendations for patients who have lateral ankle instability and peroneal tendon injuries from the perspective of a sports medicine foot and ankle specialist...
February 15, 2017: Instructional Course Lectures
https://www.readbyqxmd.com/read/28594488/fractures-of-the-calcaneus
#7
Mark R Adams, John W Munz, Kenneth L Koury
Calcaneal fractures are potentially devastating injuries. To effectively manage calcaneal fractures, surgeons must understand the anatomy of the calcaneus as well as the surgical techniques necessary to restore normal biomechanics of the foot. Surgeons also must understand calcaneal fracture patterns and classifications; initial management techniques, surgical indications and rationale, temporizing management techniques, surgical approaches, definitive management techniques, and postoperative management for calcaneal fractures; as well as outcomes and common complications of calcaneal fractures...
February 15, 2017: Instructional Course Lectures
https://www.readbyqxmd.com/read/28587794/biomechanical-analysis-of-ankle-ligamentous-sprain-injury-cases-from-televised-basketball-games-understanding-when-how-and-why-ligament-failure-occurs
#8
Emmanouil Panagiotakis, Kam-Ming Mok, Daniel Tik-Pui Fong, Anthony M J Bull
OBJECTIVES: Ankle sprains due to landing on an opponent's foot are common in basketball. There is no analysis to date that provides a quantification of this injury mechanism. The aim of this study was to quantify the kinematics of this specific injury mechanism and relate this to lateral ankle ligament biomechanics. DESIGN: Case series. METHODS: The model-based image-matching technique was used to quantify calcaneo-fibular-talar kinematics during four ankle inversion sprain injury incidents in televised NBA basketball games...
May 25, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28587575/comparison-of-multisegmental-foot-and-ankle-motion-between-total-ankle-replacement-and-ankle-arthrodesis-in-adults
#9
Sang Gyo Seo, Eo Jin Kim, Doo Jae Lee, Kee Jeong Bae, Kyoung Min Lee, Dong Yeon Lee
BACKGROUND: Total ankle replacement (TAR) and ankle arthrodesis (AA) are usually performed for severe ankle arthritis. We compared postoperative foot segmental motion during gait in patients treated with TAR and AA. METHODS: Gait analysis was performed in 17 and 7 patients undergoing TAR and AA, respectively. Subjects were evaluated using a 3-dimensional multisegmental foot model with 15 markers. Temporal gait parameters were calculated. The maximum and minimum values and the differences in hallux, forefoot, hindfoot, and arch in 3 planes (sagittal, coronal, transverse) were compared between the 2 groups...
May 1, 2017: Foot & Ankle International
https://www.readbyqxmd.com/read/28576193/hindfoot-arthrodesis-for-the-elective-and-posttraumatic-foot-deformity
#10
REVIEW
John J Stapleton, Thomas Zgonis
Triple (talonavicular, subtalar, and calcaneocuboid) joint arthrodesis and most recently double (talonavicular and subtalar) joint arthrodesis have been well proposed in the literature for surgical repair of the elective, posttraumatic, and/or neuropathic hindfoot deformities. The articulation of the hindfoot with the ankle and midfoot is multiaxial, and arthrodesis of these joints can significantly alter the lower extremity biomechanical manifestations by providing anatomic correction and alignment. This article reviews the indications and preoperative planning for some of the most common procedures to address the hindfoot deformity...
July 2017: Clinics in Podiatric Medicine and Surgery
https://www.readbyqxmd.com/read/28561380/functional-adaptation-of-the-calcaneus-in-historical-foot-binding
#11
Natalie Reznikov, Carina Phillips, Martyn Cooke, Amin Garbout, Farah Ahmed, Molly M Stevens
The normal structure of human feet is optimized for shock dampening during walking and running. Foot binding was a historical practice in China aimed at restricting the growth of female feet for aesthetic reasons. In a bound foot the shock-dampening function normally facilitated by the foot arches is withdrawn, resulting in the foot functioning as a rigid extension of the lower leg. An interesting question inspiring this study regards the nature of adaptation of the heel bone to this non-physiological function using the parameters of cancellous bone anisotropy and 3D fabric topology using a novel inter-trabecular angle (ITA) analysis...
May 31, 2017: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/28559643/variability-between-clarke-s-angle-and-chippaux-smirak-index-for-the-diagnosis-of-flat-feet
#12
Cristina Gonzalez-Martin, Salvador Pita-Fernandez, Teresa Seoane-Pillado, Beatriz Lopez-Calviño, Sonia Pertega-Diaz, Vicente Gil-Guillen
BACKGROUND: The measurements used in diagnosing biomechanical pathologies vary greatly. The aim of this study was to determine the concordance between Clarke's angle and Chippaux-Smirak index, and to determine the validity of Clarke's angle using the Chippaux-Smirak index as a reference. METHODS: Observational study in a random population sample (n= 1,002) in A Coruña (Spain). After informed patient consent and ethical review approval, a study was conducted of anthropometric variables, Charlson comorbidity score, and podiatric examination (Clarke's angle and Chippaux-Smirak index)...
March 30, 2017: Colombia Médica: CM
https://www.readbyqxmd.com/read/28552921/the-influence-of-landing-mat-composition-on-ankle-injury-risk-during-a-gymnastic-landing-a-biomechanical-quantification
#13
Xiaofei Xiao, Weiya Hao, Xuhong Li, Bingjun Wan, Gongbing Shan
PURPOSE: About 70% injury of gymnasts happened during landing - an interaction between gymnast and landing mat. The most injured joint is the ankle. The current study examined the effect of mechanical properties of landing mat on ankle loading with aims to identify means of decreasing the risk of ankle injury. METHOD: Gymnastic skill - salto backward stretched with 3/2 twist was captured by two high-speed camcorders and digitized by using SIMI-Motion software. A subject-specific, 14-segment rigid-body model and a mechanical landing-mat model were built using BRG...
2017: Acta of Bioengineering and Biomechanics
https://www.readbyqxmd.com/read/28551468/effects-of-different-movement-modes-on-plantar-pressure-distribution-patterns-in-obese-and-non-obese-chinese-children
#14
Yan Song-Hua, Wang Lu, Zhang Kuan
Walking, slow running (jogging) and fast running often occur in daily life, Physical Education Class and Physical Fitness Test for children. However, potential impact of jogging and running on plantar pressure of children is not clear. The purpose of this study was to compare the characteristics of plantar pressure distribution patterns in obese and non-obese children during walking, jogging and running, and evaluate biomechanical effects of three movements on obese children. A 2-m footscan plantar pressure plate (RSscan International, Belgium) was used to collect the gait data of 20 obese children (10...
May 4, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28544949/the-influence-of-shoe-aging-on-children-running-biomechanics
#15
Alexis Herbaut, Pascale Chavet, Maxime Roux, Nils Guéguen, Franck Barbier, Emilie Simoneau-Buessinger
Athletic children are prone to overuse injuries, especially at the heel and knee. Since footwear is an extrinsic factor of lower limb injury risk, the aim of this study was to assess the influence of shoe aging on children running biomechanics. Fourteen children active in sports participated in a laboratory biomechanical evaluation. A new pair of shoes was provided to each participant at an inclusion visit. Four months later, the participants performed a running task and their kinematics and kinetics were assessed both with their used shoes and with a new pair of shoes identical to the first...
July 2017: Gait & Posture
https://www.readbyqxmd.com/read/28539149/mobility-and-agility-during-locomotion-in-the-mark-iii-space-suit
#16
Conor R Cullinane, Richard A Rhodes, Leia A Stirling
INTRODUCTION: The Mark III (MIII) space suit assembly (SSAs) implements a multibearing, hard-material hip brief assembly (HBA). We hypothesize that: 1) the MIII HBA restricts operator mobility and agility which manifests in effects to gait parameters; 2) the waist bearing provides rotational motion, partially alleviating the restrictions; and 3) there are resistive, speed-dependent torques associated with the spinning bearings which further diminish mobility and agility. METHODS: A subject (Suited and Unsuited) performed two planetary tasks-walking forward (WF) and backward (WB)...
June 1, 2017: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/28533626/nonhealing-progressive-stress-fractures-of-the-foot-in-a-13-year-old-basketball-player-is-vitamin-k-deficiency-a-risk-factor
#17
Meral Bayramoğlu, Nuray Ünlütürk
[Purpose] To report an adolescent male basketball player with nonhealing stress fractures of the foot and discuss the probable factors. [Subject and Methods] A 13-year-old basketball player presented with right foot pain. He had been playing basketball for three years and practicing 5 days/week. He denied any increase in daily training intensity. Magnetic resonance imaging confirmed stress fractures of the cuboid and cuneiform, with mild edema of the soft tissues between the tarsal bones and tenosynovitis of the flexor hallucis and flexor digitorum longi...
April 2017: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/28533609/gait-abnormalities-in-patients-with-chronic-ankle-instability-can-improve-following-a-non-invasive-biomechanical-therapy-a-retrospective-analysis
#18
Shay Tenenbaum, Ofir Chechik, Jason Bariteau, Nathan Bruck, Yiftah Beer, Mazen Falah, Ganit Segal, Amit Mor, Avi Elbaz
[Purpose] The purpose of this study was to evaluate the changes in gait patterns and clinical outcomes of patients with chronic ankle instability (CAI) following treatment with a home-based non-invasive biomechanical device. [Subjects and Methods] Thirty-three patients with CAI were compared with 43 healthy controls. Patients underwent a spatiotemporal gait assessment before and three months following treatment. Clinical evaluation was recorded with SF-36 Health Survey and the Foot and Ankle Outcome Score (FAOS)...
April 2017: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/28527835/biomechanical-study-on-surgical-fixation-methods-for-minimally-invasive-treatment-of-hallux-valgus
#19
Rui Mao, Junchao Guo, Chenyu Luo, Yubo Fan, Jianmin Wen, Lizhen Wang
Hallux valgus (HV) was one of the most frequent female foot deformities. The aim of this study was to evaluate mechanical responses and stabilities of the Kirschner, bandage and fiberglass fixations after the distal metatarsal osteotomy in HV treatment. Surface traction of different forefoot regions in bandage fixation and the biomechanical behavior of fiberglass bandage material were measured by a pressure sensor device and a mechanical testing, respectively. A three-dimensional foot finite element (FE) model was developed to simulate the three fixation methods (Kirschner, bandage and fiberglass fixations) in weight bearing...
May 17, 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/28513212/an-optical-fiber-based-smart-textile-smart-socks-to-manage-biomechanical-risk-factors-associated-with-diabetic-foot-amputation
#20
Bijan Najafi, Hooman Mohseni, Gurtej S Grewal, Talal K Talal, Robert A Menzies, David G Armstrong
OBJECTIVE: This study aimed to validate a smart-textile based on fiber-optics for simultaneous measurement of plantar temperature, pressure, and joint angles in patients with diabetic peripheral neuropathy (DPN). METHODS: After in-vitro validation in the laboratory, 33 eligible subjects with DPN were recruited (age: 58 ± 8 years, BMI: 31.5 ± 8 kg/m(2)) for assessing plantar pressure and temperature during habitual gait-speed in a clinical-setting. All participants were asked to walk at their habitual speed while wearing a pair of sensorized socks made from highly flexible fiber optics (SmartSox)...
May 1, 2017: Journal of Diabetes Science and Technology
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