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Ankle stability

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https://www.readbyqxmd.com/read/28186902/a-wearable-hip-assist-robot-can-improve-gait-function-and-cardiopulmonary-metabolic-efficiency-in-elderly-adults
#1
Hwang-Jae Lee, Suhyun Lee, Won Hyuk Chang, Keehong Seo, Youngbo Shim, Byung-Ok Choi, Gyu-Ha Ryu, Yun-Hee Kim
The aims of this study were to investigate the effectiveness of a newly developed wearable hip assist robot that uses an active assist algorithm to improve gait function, muscle effort, and cardiopulmonary metabolic efficiency in elderly adults. Thirty elderly adults (15 males/15 females) participated in this study. The experimental protocol consisted of overground gait at comfortable speed under three different conditions: free gait without robot assistance, robot-assisted gait with zero torque (RAG-Z), and full robot-assisted gait (RAG)...
February 6, 2017: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/28183211/3d-optical-investigation-of-2-nail-systems-used-in-tibiotalocalcaneal-arthrodesis
#2
Julia Evers, Martin Lakemeier, Dirk Wähnert, Martin Schulze, Martinus Richter, Michael J Raschke, Sabine Ochman
BACKGROUND: Although retrograde intramedullary nails for tibiotalocalcaneal arthrodesis (TTCA) are an established fixation method, few studies have evaluated the stability of the available nail systems. The purpose of this study was to compare biomechanically the primary stability of 2 nail-systems, A3 (Small Bone Innovations) and HAN (Synthes), in human cadavers and analyze the exact point of instability in TTCA by means of optical measurement. METHODS: In 6 pairs of lower legs (n = 12) of fresh-frozen human cadavers with osteoporotic bone structure, bone mineral density (BMD) was determined...
February 1, 2017: Foot & Ankle International
https://www.readbyqxmd.com/read/28169148/risk-factors-that-predict-severe-injuries-in-university-rugby-sevens-players
#3
Rezvan Mirsafaei Rizi, Simon S Yeung, Nathan J Stewart, Ella W Yeung
OBJECTIVES: To investigate injury incidence and the influence of physical fitness parameters on the risk of severe injuries in players on rugby sevens university teams. DESIGN: Prospective cohort study. METHODS: Rugby players from three universities (N=104; 90M:14F; 20.6±1.9years) were recruited before the beginning of the season. Players underwent pre-season assessments of power, strength, speed, agility, endurance, stability, and flexibility...
January 24, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28167191/effect-of-cognitive-task-on-postural-control-of-the-patients-with-chronic-ankle-instability-during-single-and-double-leg-standing
#4
Zeinab Shiravi, Saeed Talebian Moghadam, Mohammad Reza Hadian, Gholamreza Olyaei
OBJECTIVE: The aim of this study was to investigate the effect of a cognitive task on standing postural control of the injured and non-injured leg of athletes with chronic ankle instability. METHODS: Postural stability was measured by center of pressure parameters while chronic ankle instability patients (n = 8) randomly performed single and double leg standing in isolation or concurrently with a digit-backward cognitive task. RESULTS: After performing a concurrent cognitive task, anteroposterior sway significantly decreased in injured leg (P < 0...
January 2017: Journal of Bodywork and Movement Therapies
https://www.readbyqxmd.com/read/28167064/syndesmosis-stabilisation-screws-versus-flexible-fixation
#5
REVIEW
Matthew C Solan, Mark S Davies, Anthony Sakellariou
Orthopedic surgery is not short of situations where there is controversy regarding optimum management. Treating ankle syndesmosis injuries is an example where practice varies widely and there are many questions that remain unsatisfactorily answered. When addressing the type of syndesmosis stabilization that is required it is essential to ascertain the extent of instability. Only then can a logical approach to restoring the ankle mortise be achieved. Fixation of fibula shaft fractures and posterior malleolus fractures can restore sufficient stability to render syndesmosis stabilization unnecessary...
March 2017: Foot and Ankle Clinics
https://www.readbyqxmd.com/read/28159052/complex-ankle-arthrodesis-with-step-cut-osteotomy-in-charcot-arthropathy-with-bone-loss
#6
Sean Booth, Moez Ballal, Anand Pillai
We report a case of a complex limb salvage ankle arthrodesis in a patient with Charcot arthropathy. A step-cut osteotomy was performed in order to tackle the issues of anterior tibial bone loss; worsening leg length discrepancy; soft tissue contraction; joint instability and high risk of non-union. The construct formed by the step-cut allowed for the preservation of good bone stock; avoidance of further limb shortening; increased torsional stability and increased surface area for bony union. This resulted in a patient with a stable, plantigrade foot appropriate for footwear...
March 2017: Foot and Ankle Surgery: Official Journal of the European Society of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/28149400/the-effect-of-different-decline-angles-on-the-biomechanics-of-double-limb-squats-and-the-implications-to-clinical-and-training-practice
#7
Jim Richards, James Selfe, Jonathan Sinclair, Karen May, Gavin Thomas
Bilateral decline squatting has been well documented as a rehabilitation exercise, however, little information exists on the optimum angle of decline. The aim of this study was to determine the ankle and knee angle, moments, the patellofemoral joint load, patellar tendon load and associated muscle activity while performing a double limb squat at different decline angles and the implications to rehabilitation. Eighteen healthy subjects performed double limb squats at 6 angles of declination: 0, 5, 10, 15, 20 and 25 degrees...
September 1, 2016: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28148666/custom-made-total-ankle-arthroplasty-for-the-salvage-of-major-talar-bone-loss
#8
J Wagener, C E Gross, C Schweizer, T Horn Lang, B Hintermann
AIMS: A failed total ankle arthroplasty (TAA) is often associated with much bone loss. As an alternative to arthrodesis, the surgeon may consider a custom-made talar component to compensate for the bone loss. Our aim in this study was to assess the functional and radiological outcome after the use of such a component at mid- to long-term follow-up. PATIENTS AND METHODS: A total of 12 patients (five women and seven men, mean age 53 years; 36 to77) with a failed TAA and a large talar defect underwent a revision procedure using a custom-made talar component...
February 2017: Bone & Joint Journal
https://www.readbyqxmd.com/read/28148513/no-association-between-static-and-dynamic-postural-control-and-acl-injury-risk-among-female-elite-handball-and-football-players-a-prospective-study-of-838-players
#9
Kathrin Steffen, Agnethe Nilstad, Tron Krosshaug, Kati Pasanen, Aleksander Killingmo, Roald Bahr
BACKGROUND: Research on balance measures as potential risk factors for ACL injury is limited. OBJECTIVE: To assess whether postural control was associated with an increased risk for ACL injuries in female elite handball and football players. METHOD: Premier league players were tested in the preseason and followed prospectively for ACL injury risk from 2007 through 2015. At baseline, we recorded player demographics, playing experience, ACL and ankle injury history...
February 2017: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/28146401/no-effect-of-generalized-joint-hypermobility-on-injury-risk-in-elite-female-soccer-players
#10
Donna Blokland, Karin M Thijs, Frank J G Backx, Edwin A Goedhart, Bionka M A Huisstede
BACKGROUND: Although it has been suggested that generalized joint hypermobility (GJH) is a risk factor for injury in soccer players, it remains unclear whether this applies to elite female soccer players. PURPOSE: To investigate whether GJH is a risk factor for injury in elite female soccer players. STUDY DESIGN: Cohort study; Level of evidence, 2. METHODS: Elite female soccer players in the Netherlands were screened at the start of the 2014-2015 competitive season...
February 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28134133/a-model-for-differential-leg-joint-function-during-human-running
#11
Mu Qiao, James J Abbas, Devin L Jindrich
Locomotion requires coordination of leg joints to maintain stability and to maneuver. We studied leg joint function during constant-average-velocity running and the sagittal-plane maneuvers of step ascent and descent. We tested two hypotheses: (1) that leg joints perform distinct functions during locomotion; and (2) that humans select functional parameters to maximize intrinsic dynamic stability. We recorded whole-body kinematics and forces when participants stepped up or down a single vertical step, and found that leg joints show functional differences during both constant-average-velocity locomotion and maneuvers...
January 30, 2017: Bioinspiration & Biomimetics
https://www.readbyqxmd.com/read/28120617/collar-height-and-heel-counter-stiffness-for-ankle-stability-and-athletic-performance-in-basketball
#12
Hui Liu, Zitian Wu, Wing-Kai Lam
This study examined the effects of collar height and heel counter-stiffness of basketball shoes on ankle stability during sidestep cutting and athletic performance. 15 university basketball players wore customized shoes with different collar heights (high and low) and heel counter-stiffness (regular, stiffer and stiffest) for this study. Ankle stability was evaluated in sidestep cutting while athletic performance evaluated in jumping and agility tasks. All variables were analysed using two-way repeated ANOVA...
January 25, 2017: Research in Sports Medicine
https://www.readbyqxmd.com/read/28116272/management-of-large-bone-defects-in-diaphyseal-fractures-by-induced-membrane-formation-by-masquelet-s-technique
#13
R Sivakumar, M Gulam Mohideen, M Chidambaram, T Vinoth, Prahalad Kumar Singhi, V Somashekar
INTRODUCTION: Management of the large gap in long bone fractures is a challenging problem after compound injuries. A novel technique called as Masquelet's technique of "induced membrane formation", is used to bridge a gap of more than 5 cm using bone cement as a spacer in first stage and autologous cancellous bone graft to fill the gap in second stage. CASE PRESENTATION: We present two different and difficult cases with bone defects after open injuries associated with long bone fractures in this paper...
July 2016: Journal of Orthopaedic Case Reports
https://www.readbyqxmd.com/read/28110390/operative-treatment-of-lateral-ligament-instability
#14
REVIEW
Rachel J Shakked, Sydney Karnovsky, Mark C Drakos
PURPOSE OF REVIEW: Ankle sprains, which account for 40% of sports injuries in the USA, can lead to chronic ankle instability. Chronic ankle instability can be classified as functional, mechanical, or a combination of both and is diagnosed using a combination of a physical exam, an MRI, and stress radiographs. This review focuses on different approaches to treatment, including non-operative and operative techniques, of chronic ankle instability, including reviewing traditional procedures as well as more novel and newer techniques...
January 21, 2017: Current Reviews in Musculoskeletal Medicine
https://www.readbyqxmd.com/read/28110171/long-term-usability-and-bio-integration-of-polyimide-based-intra-neural-stimulating-electrodes
#15
S Wurth, M Capogrosso, S Raspopovic, J Gandar, G Federici, N Kinany, A Cutrone, A Piersigilli, N Pavlova, R Guiet, G Taverni, J Rigosa, P Shkorbatova, X Navarro, Q Barraud, G Courtine, S Micera
Stimulation of peripheral nerves has transiently restored lost sensation and has the potential to alleviate motor deficits. However, incomplete characterization of the long-term usability and bio-integration of intra-neural implants has restricted their use for clinical applications. Here, we conducted a longitudinal assessment of the selectivity, stability, functionality, and biocompatibility of polyimide-based intra-neural implants that were inserted in the sciatic nerve of twenty-three healthy adult rats for up to six months...
January 13, 2017: Biomaterials
https://www.readbyqxmd.com/read/28100099/a-user-centered-qualitative-study-on-experiences-with-ankle-foot-orthoses-and-suggestions-for-improved-design
#16
Dymphy van der Wilk, Juha Markus Hijmans, Klaas Postema, Gijsbertus Jacob Verkerke
BACKGROUND: Improving ankle-foot orthosis design can best be done by implementing a user-centered approach. OBJECTIVE: To provide insight into the ideas of ankle-foot orthosis users with flaccid ankle muscle paresis on the importance of activities and suggestions for an improved ankle-foot orthosis design. STUDY DESIGN: A focus-group discussion with eight ankle-foot orthosis users (57 ± 5 years, 50% female). METHODS: Main inclusion criteria were as follows: ⩾18 years, unable to stand on tip-toe and unable to lift toes...
January 1, 2017: Prosthetics and Orthotics International
https://www.readbyqxmd.com/read/28097520/extremity-fractures-associated-with-atvs-and-dirt-bikes-a-10-year-national-epidemiologic-study
#17
D J Lombardo, T Jelsema, A Gambone, M Weisman, G Petersen-Fitts, J D Whaley, V J Sabesan
BACKGROUND: Morbidity and mortality of all-terrain vehicles and dirt bikes have been studied, as well as the association of helmet use and head injury. HYPOTHESIS/PURPOSE: The purpose of this study is to compare and contrast the patterns of extremity fractures associated with ATVs and dirt bikes. We believe there will be unique and potentially preventable injury patterns associated with dirt bikes and three-wheeled ATVs due to the poor stability of these vehicles...
January 17, 2017: Musculoskeletal Surgery
https://www.readbyqxmd.com/read/28093261/experimental-evaluation-of-a-new-morphological-approximation-of-the-articular-surfaces-of-the-ankle-joint
#18
Claudio Belvedere, Sorin Siegler, Andrea Ensini, Jason Toy, Paolo Caravaggi, Ramya Namani, Giulia Giannini, Stefano Durante, Alberto Leardini
The mechanical characteristics of the ankle such as its kinematics and load transfer properties are influenced by the geometry of the articulating surfaces. A recent, image-based study found that these surfaces can be approximated by a saddle-shaped, skewed, truncated cone with its apex oriented laterally. The goal of this study was to establish a reliable experimental technique to study the relationship between the geometry of the articular surfaces of the ankle and its mobility and stability characteristics and to use this technique to determine if morphological approximations of the ankle surfaces based on recent discoveries, produce close to normal behavior...
January 7, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28093252/low-energy-open-ankle-fractures-in-the-elderly-outcome-and-treatment-algorithm
#19
Asanka Wijendra, Rupali Alwe, Michael Lamyman, George A Grammatopoulos, Gregoris Kambouroglou
BACKGROUND: With an aging but still active population, open ankle fractures are increasingly presenting as low energy fragility injuries, sharing many characteristics with that of hip fractures. Yet, there is little in the literature on the management and outcome of these fractures. The primary aim of this study was to describe the outcome following open, ankle fragility fracture. Our secondary aim was to identify potential factors that improved outcome. METHODS: All consecutive, low energy open ankle fractures treated at a Level I Trauma Centre over a five-year period were included...
December 10, 2016: Injury
https://www.readbyqxmd.com/read/28089126/the-all-inside-arthroscopic-brostr%C3%A3-m-procedure-augmented-with-a-proximal-suture-anchor-an-innovative-technique
#20
James M Cottom, Phillip E Richardson
Arthroscopic treatments of chronic lateral ankle stability have been reported in the literature. The authors report on an innovative technique augmenting the "All- Inside" Arthroscopic Broström procedure with an additional suture anchor.
January 6, 2017: Journal of Foot and Ankle Surgery: Official Publication of the American College of Foot and Ankle Surgeons
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