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https://www.readbyqxmd.com/read/29437059/a-new-and-reliable-classification-system-for-fractures-of-the-navicular-and-associated-injuries-to-the-midfoot
#1
M J Petrie, C M Blakey, C Chadwick, H G Davies, C M Blundell, M B Davies
AIMS: Fractures of the navicular can occur in isolation but, owing to the intimate anatomical and biomechanical relationships, are often associated with other injuries to the neighbouring bones and joints in the foot. As a result, they can lead to long-term morbidity and poor function. Our aim in this study was to identify patterns of injury in a new classification system of traumatic fractures of the navicular, with consideration being given to the commonly associated injuries to the midfoot...
February 2018: Bone & Joint Journal
https://www.readbyqxmd.com/read/29190850/mri-cartilage-assessment-of-the-subtalar-and-midtarsal-joints-during-a-transcontinental-ultramarathon-new-insights-into-human-locomotion
#2
Uwe Hans-Werner Schütz, Christian Billich, Daniel Schoss, Meinrad Beer, Jutta Ellermann
MR measurements can be accurately performed during 4486 km of running, opening a window into in vivo assessment of hindfoot articular cartilage under extreme ultra-endurance loading. This observational cross-sectional study included 22 randomized participants of TransEurope FootRace between Italy and the North Cape, which was accompanied by a trailer-mounted 1.5T MRI scanner over 9 weeks. Four follow up MR examinations of subtalar and midtarsal joints were performed. Statistics of cartilage T2*  and thickness were obtained...
November 30, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/29172758/deformity-and-clinical-outcomes-following-operative-correction-of-charcot-foot-a-new-classification-with-implications-for-treatment
#3
Michael S Pinzur, Adam P Schiff
BACKGROUND: The historic treatment of Charcot foot arthropathy has been immobilization during the active phase of the disease process, followed by accommodative bracing of the acquired deformity. Evidence derived from modern patient-reported outcomes investigations has convinced many surgeons to attempt operative correction of the acquired deformity with a goal of improving quality of life. METHODS: Over a 12-year period, 214 patients (9 bilateral) underwent reconstruction of the acquired deformity associated with midtarsal Charcot foot arthropathy...
November 1, 2017: Foot & Ankle International
https://www.readbyqxmd.com/read/29131657/variability-of-the-dynamic-stiffness-of-foot-joints-effect-of-gait-velocity-variation
#4
Enrique Sanchis, Joaquín Luis Sancho-Bru, Alba Roda-Sales, Javier Pascual Huerta
BACKGROUND: Comparison of dynamic stiffness of foot joints was previously proposed to investigate pathological situations with changes in the properties of muscle and passive structures. Samples must be controlled to reduce the variability within groups being compared, which may arise from different sources, such as gait speed or foot posture index (FPI). METHODS: In this work, variability in the measurement of the dynamic stiffness of ankle, midtarsal and metatarsophalangeal joints was studied in a controlled sample of healthy adult male subjects with normal FPI, and the effect of gait speed was analyzed...
November 13, 2017: Journal of the American Podiatric Medical Association
https://www.readbyqxmd.com/read/29112474/mri-evaluation-of-midtarsal-chopart-sprain-in-the-setting-of-acute-ankle-injury
#5
William R Walter, Anna Hirschmann, Erin F Alaia, Elisabeth R Garwood, Zehava S Rosenberg
OBJECTIVE: This study determined the frequency and MRI appearance of osseous and ligamentous injuries in midtarsal (Chopart) sprains and their association with ankle sprains after acute ankle injuries. Prospective diagnosis of and interobserver agreement regarding midtarsal injury among musculoskeletal radiologists were also assessed. SUBJECTS AND METHODS: Two cohorts with ankle MRIs were identified via a digital PACS search: patients who had undergone MRI within 8 weeks after ankle injury and control subjects who had not sustained ankle trauma...
November 7, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/29093757/movement-coordination-patterns-between-the-foot-joints-during-walking
#6
John B Arnold, Paolo Caravaggi, François Fraysse, Dominic Thewlis, Alberto Leardini
Background: In 3D gait analysis, kinematics of the foot joints are usually reported via isolated time histories of joint rotations and no information is provided on the relationship between rotations at different joints. The aim of this study was to identify movement coordination patterns in the foot during walking by expanding an existing vector coding technique according to an established multi-segment foot and ankle model. A graphical representation is also described to summarise the coordination patterns of joint rotations across multiple patients...
2017: Journal of Foot and Ankle Research
https://www.readbyqxmd.com/read/29065674/two-segment-foot-model-for-the-biomechanical-analysis-of-squat
#7
E Panero, L Gastaldi, W Rapp
Squat exercise is acquiring interest in many fields, due to its benefits in improving health and its biomechanical similarities to a wide range of sport motions and the recruitment of many body segments in a single maneuver. Several researches had examined considerable biomechanical aspects of lower limbs during squat, but not without limitations. The main goal of this study focuses on the analysis of the foot contribution during a partial body weight squat, using a two-segment foot model that considers separately the forefoot and the hindfoot...
2017: Journal of Healthcare Engineering
https://www.readbyqxmd.com/read/28521518/3d-characterisation-of-the-dynamics-of-foot-joints-of-adults-during-walking-gait-pattern-identification
#8
E Sanchis-Sales, J L Sancho-Bru, A Roda-Sales, J Pascual-Huerta
A detailed description of the kinematics and kinetics of the ankle, midtarsal and metatarsophalangeal joints of the feet of a healthy adult male population during barefoot walking is provided. Plots of the angles and moments in each plane during the stance phase are reported, along with the mean and standard deviation values of 87 different parameters that characterise the 3D dynamics of the foot joints. These parameters were used to check for similarities between subjects through a hierarchical analysis that allowed three different gait patterns to be identified, most of the differences corresponding to the frontal and transverse planes...
July 2017: Computer Methods in Biomechanics and Biomedical Engineering
https://www.readbyqxmd.com/read/28257675/equinus-and-lengthening-techniques
#9
REVIEW
Patrick A DeHeer
Equinus is linked to most lower extremity biomechanically related disorders. Defining equinus as ankle joint dorsiflexion less than 5° of dorsiflexion with the knee extended is the basis for evaluation and management of the deformity. Consistent evaluation methodology using a goniometer with the subtalar joint in neutral position and midtarsal joint supinated while dorsiflexing the ankle with knee extended provides a consistent clinical examination. For equinus deformity with an associated disorder, comprehensive treatment mandates treatment of the equinus deformity...
April 2017: Clinics in Podiatric Medicine and Surgery
https://www.readbyqxmd.com/read/28253941/arthrodesis-of-the-ankle
#10
H Zwipp
About 90 % of all cases of painful posttraumatic ankle arthritis can be very successfully treated with a minor invasive ankle arthrodesis technique by using a small anterior approach and a fixation with four 6. 5 mm screws of which the posteromedial and transfibular one are inserted percutaneously. The results with this standardized procedure have been reported previously as excellent and good in a mid-term run of 6 years (34). This technique leads to a high union rate of 99% (92 of 93) with rapid bone healing within 8 ± 2 weeks, it causes a low minor complication rate of 8 % and enables a significant increase of the AOFAS ankle/hindfoot score (17) from 36 preoperatively to 85 postoperatively as well as a midtarsal movement of 24° ± 16°...
2017: Acta Chirurgiae Orthopaedicae et Traumatologiae Cechoslovaca
https://www.readbyqxmd.com/read/28224074/arthroscopic-resection-of-too-long-anterior-process-of-the-calcaneus
#11
Tun Hing Lui
A too-long anterior process (TLAP) of the calcaneus is an elongated anteromedial process of the calcaneus impinging the navicular or the talar head. TLAP can cause recurrent ankle sprain, peroneal muscle spasm, or persistent tarsal pain in adolescents. Arthroscopic resection is indicated if the symptoms do not respond to conservative treatment. It has the advantage of assessment of completeness of bone resection and treatment of associated lesions of the adjacent joints. The purpose of this technical note is to report an arthroscopic approach of the resection of the TLAP with the lateral midtarsal portal as the viewing portal...
October 2016: Arthroscopy Techniques
https://www.readbyqxmd.com/read/27821997/acute-plantar-midtarsal-dislocation-with-intercuneiform-dislocation-case-study-diagnosis-and-management
#12
Andrew P Harris, Joseph A Gil, Avi D Goodman, Christopher R Nacca, Todd R Borenstein
The midtarsal joint, also known as the Chopart or the transverse tarsal joint, is composed of the talonavicular and calcaneocuboid articulations.(1) Midtarsal joint dislocations are rare injuries given the strong periarticular ligamentous support.2, 3 Medial, lateral, dorsal, and rarely plantar dislocations have been reported from multiple high-energy mechanisms.4, 5 We describe the case of a 24-year-old male who sustained talonavicular and calcaneocuboid plantar dislocations associated with a middle and lateral intercuneiform dislocation, open proximal 5th metatarsal fracture, 2nd-4th metatarsal base fractures, and lateral cuneiform fracture...
March 2017: Journal of Orthopaedics
https://www.readbyqxmd.com/read/27449524/primary-intraosseous-malignant-peripheral-nerve-sheath-tumor-of-the%C3%A2-medial-cuneiform-a-case-report-and-review-of-the-literature
#13
REVIEW
Saravanaraja Muthusamy, Sheila A Conway, J David Pitcher, H Thomas Temple
Peripheral nerve sheath tumors (benign and malignant) usually arise in the soft tissues and are unusual in bone. Intraosseous peripheral nerve sheath tumors are usually benign and constitute approximately 0.2% of all bone tumors. Intraosseous malignant peripheral nerve sheath tumors (MPNSTs) are uncommon and usually result from secondary invasion. Only a few cases of primary intraosseous MPNSTs have been reported in published studies, and these were localized mostly in the mandible (approximately 50%) or maxilla, spine, and, occasionally, in the appendicular skeleton...
January 2017: Journal of Foot and Ankle Surgery: Official Publication of the American College of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/27381808/extended-foot-ankle-musculoskeletal-models-for-application-in-movement-analysis
#14
Tiago M Malaquias, Carolina Silveira, Wouter Aerts, Friedl De Groote, Greta Dereymaeker, Jos Vander Sloten, Ilse Jonkers
Multibody simulations of human motion require representative models of the anatomical structures. A model that captures the complexity of the foot is still lacking. In the present work, two detailed 3D multibody foot-ankle models generated based on CT scans using a semi-automatic tool are described. The proposed models consists of five rigid segments (talus, calcaneus, midfoot, forefoot and toes), connected by five joints (ankle, subtalar, midtarsal, tarsometatarsal and metatarsophalangeal), one with 15DOF and the other with 8DOF...
February 2017: Computer Methods in Biomechanics and Biomedical Engineering
https://www.readbyqxmd.com/read/27374354/prospective-observational-study-of-midtarsal-joint-sprain-epidemiological-and-ultrasonographic-analysis
#15
A Thiounn, C Szymanski, C Lalanne, K Soudy, X Demondion, C Maynou
INTRODUCTION: Foot and ankle injuries (FAI) are very common, with about 6000 cases per day in France. Unlike lateral ankle sprain (LAS), the diagnosis of midtarsal joint sprain (MJS, also known as Chopart's joint sprain) is not widely known. This prospective study aims to detail the epidemiology of MJS and compare it to LAS. PATIENTS AND METHOD: The study was conducted within our institution over a period of 16 months. Patients with clinical signs predictive of MJS without radiographic bone lesion underwent ultrasound assessment...
September 2016: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/27354397/multisegment-foot-kinematic-and-kinetic-compensations-in-level-and-uphill-walking-following-tibiotalar-arthrodesis
#16
COMPARATIVE STUDY
Dustin A Bruening, Timothy E Cooney, Matthew S Ray, Gregory A Daut, Kevin M Cooney, Stephanie M Galey
BACKGROUND: Foot and ankle movement alterations following ankle arthrodesis are still not well understood, particularly those that might contribute to the documented increase in adjacent joint arthritis. Generalized tarsal hypermobility has long been postulated, but not confirmed in gait or functional movements. The purpose of this study was to more thoroughly evaluate compensation mechanisms used by arthrodesis patients during level and uphill gait through a variety of measurement modalities and a detailed breakdown of gait phases...
October 2016: Foot & Ankle International
https://www.readbyqxmd.com/read/26895359/dynamic-flexion-stiffness-of-foot-joints-during-walking
#17
Enrique Sanchis-Sales, Joaquin L Sancho-Bru, Alba Roda-Sales, Javier Pascual-Huerta
BACKGROUND: Dynamic stiffness can be used for studying foot pathologic abnormalities and for developing prostheses and orthoses. Although previous works have studied the role of ankle joint stiffness during gait, other foot joints have not yet been analyzed. We sought to characterize the dynamic stiffness of the ankle, midtarsal, and metatarsophalangeal joints during normal walking. METHODS: Kinematics and contact data from four healthy individuals during walking were registered with a three-dimensional motion analysis system and a pressure platform...
January 2016: Journal of the American Podiatric Medical Association
https://www.readbyqxmd.com/read/26860043/classification-and-outcome-of-fracture-dislocation-of-the-cuneiform-bones
#18
Alexander T Mehlhorn, Hagen Schmal, Maria Anna Legrand, Norbert P Südkamp, Peter C Strohm
Fractures and dislocations of the cuneiform bones are rare injuries to the midtarsal foot. The injury severity is often unclear, and the prognostic factors are unknown. The purpose of the present study was to characterize our insights of the diagnostics, therapy, and fracture patterns. We questioned whether the number of involved cuneiform bones and the type of injury would affect the clinical outcome. With this information, we aimed to develop a classification system for injuries of the cuneonavicular joint...
November 2016: Journal of Foot and Ankle Surgery: Official Publication of the American College of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/26767963/the-subtalar-joint-complex-of-australopithecus-sediba
#19
Thomas C Prang
The hominin talus has figured prominently in previous studies of the functional morphology of the talocrural joint, but the talocalcaneal and talonavicular joints have received comparatively less attention despite their functional importance as components of the subtalar joint complex. An associated complete talus and calcaneus attributed to the Malapa Hominin 2 (MH2) individual of Australopithecus sediba offers the opportunity to evaluate the subtalar joint complex in an early hominin. Furthermore, detailed morphological comparisons of A...
January 2016: Journal of Human Evolution
https://www.readbyqxmd.com/read/26628197/rearfoot-posture-of-australopithecus-sediba-and-the-evolution-of-the-hominin-longitudinal-arch
#20
Thomas C Prang
The longitudinal arch is one of the hallmarks of the human foot but its evolutionary history remains controversial due to the fragmentary nature of the fossil record. In modern humans, the presence of a longitudinal arch is reflected in the angular relationships among the major surfaces of the human talus and calcaneus complex, which is also known as the rearfoot. A complete talus and calcaneus of Australopithecus sediba provide the opportunity to evaluate rearfoot posture in an early hominin for the first time...
2015: Scientific Reports
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