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Achilles tendon

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https://www.readbyqxmd.com/read/27923658/temporal-regulation-of-gap-junctional-communication-between-tenocytes-subjected-to-static-tensile-strain-with-physiological-and-non-physiological-amplitudes
#1
Eijiro Maeda, Haicheng Pian, Toshiro Ohashi
The present study has been performed on temporal changes in gap junctional intercellular communication (GJIC) between tenocytes under static tensile strain with the magnitude of 0% (no strain), 4% (physiological magnitude) or 8% (overloading magnitude) during a 24-h culture period. Tenocytes were isolated from rabbit Achilles tendon and seeded on a stretchable microgroove substrate. GJIC was evaluated as intercellular diffusion coefficient of calcein (DGJ) using fluorescence loss in photobleaching (FLIP) protocol accompanied with a mathematical model of molecular diffusion both within the cell and between the cells...
December 3, 2016: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/27923213/proximity-of-the-lateral-calcaneal-artery-with-a-modified-extensile-lateral-approach-compared-to-standard-extensile-approach
#2
John Y Kwon, Tyler Gonzalez, Matthew D Riedel, Ara Nazarian, Mohammad Ghorbanhoseini
BACKGROUND: The extensile lateral approach (EL) has been associated with increased wound complications such as apical necrosis which may be due partially from violation of the lateral calcaneal artery (LCA). Traditionally, the vertical limb has been placed half-way between the fibula and Achilles tendon, which may be suboptimal given the proximity to the LCA. We hypothesized that placing the vertical limb further posterior (ie, modified EL [MEL]) would increase the distance from the LCA...
October 23, 2016: Foot & Ankle International
https://www.readbyqxmd.com/read/27922288/medial-gastrocnemius-myotendinous-junction-displacement-and-plantar-flexion-strength-in-patients-treated-with-immediate-rehabilitation-after-achilles-tendon-repair
#3
Carlos I De la Fuente, Roberto Peña Y Lillo, Rodrigo Ramirez Campillo, Pablo Ortega-Auriol, Mauricio Delgado, Joel Alvarez-Ruf, Gabriel Carreño
CONTEXT:  Pathologic plantar flexion frequently occurs after operative repair of the Achilles tendon (AT) because of immobilization and non-weight bearing in the first weeks of traditional rehabilitation. Novel rehabilitation strategies that apply mobilization and weight bearing have been proposed, but their effects on medial gastrocnemius myotendinous junction displacement (MJD) and isometric plantar-flexion strength (PFS) are unknown. OBJECTIVE:  To compare the effects of 12 weeks of immediate versus traditional rehabilitation on MJD and PFS in patients with percutaneous AT repair and to compare AT rupture scores (ATRSs) during follow-up...
December 6, 2016: Journal of Athletic Training
https://www.readbyqxmd.com/read/27920330/treatment-of-insertional-achilles-pathology-with-dorsal-wedge-calcaneal-osteotomy-in-athletes
#4
Dimitrios Georgiannos, Vasilis Lampridis, Angelos Vasiliadis, Ilias Bisbinas
BACKGROUND: Insertional Achilles tendinopathy and retrocalcaneal bursitis is difficult to treat, and several operative techniques have been used after failure of conservative management. Dorsal wedge calcaneal osteotomy has been described for the treatment of insertional Achilles pathology. It was hypothesized that dorsal wedge calcaneal osteotomy would be an effective and safe method for the treatment of athletes with insertional Achilles pathology unrelieved by nonoperative measures...
December 5, 2016: Foot & Ankle International
https://www.readbyqxmd.com/read/27919416/a-3d-model-of-the-achilles-tendon-to-determine-the-mechanisms-underlying-nonuniform-tendon-displacements
#5
Geoffrey G Handsfield, Joshua M Inouye, Laura C Slane, Darryl G Thelen, G Wilson Miller, Silvia S Blemker
The Achilles is the thickest tendon in the body and is the primary elastic energy-storing component during running. The form and function of the human Achilles is complex: twisted structure, intratendinous interactions, and differential motor control from the triceps surae muscles make Achilles behavior difficult to intuit. Recent in vivo imaging of the Achilles has revealed nonuniform displacement patterns that are not fully understood and may result from complex architecture and musculotendon interactions...
November 28, 2016: Journal of Biomechanics
https://www.readbyqxmd.com/read/27919196/the-prevalence-of-spondyloarthropathy-in-fibromyalgia-patients
#6
Derya Kaşkari, Ahmet Eftal Yücel, Muhteşem Ağildere
OBJECTIVE: To document the prevalence of Spondyloarthropathy (SpA) with an evaluation of patients previously diagnosed with Fibromyalgia syndrome (FMS). METHODS: The patients diagnosed with FMS before telephoned and asked three questions to determine for inflammatory back pain. American College of Rheumatology (ACR) Fibromyalgia criteria 1990 and ACR 2010 and for diagnosing patients with SpA; criteria from the European Spondyloarthropathy Study Group (ESSG) and Amor were applied...
December 6, 2016: Modern Rheumatology
https://www.readbyqxmd.com/read/27918676/effects-of-training-load-and-leg-dominance-on-achilles-and-patellar-tendon-structure
#7
Alireza Esmaeili, Andrew M Stewart, William G Hopkins, George P Elias, Robert J Aughey
PURPOSE: Detrimental changes in tendon structure increase the risk of tendinopathies. The aim of this study was to investigate the influence of individual internal and external training loads and leg dominance on changes in the Achilles and patellar tendon structure. METHODS: The internal structure of the Achilles and patellar tendons of both limbs of 26 elite Australian footballers was assessed using ultrasound tissue characterization at the beginning and the end of an 18 week pre-season...
December 5, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27909664/arthroscopic-assisted-lower-trapezius-tendon-transfer-for-massive-irreparable-posterior-superior-rotator-cuff-tears-surgical-technique
#8
Bassem T Elhassan, Eduard Alentorn-Geli, Andrew T Assenmacher, Eric R Wagner
Tendon transfer options to reconstruct a massive irreparable posterior-superior rotator cuff tear include latissimus dorsi, teres major, or lower trapezius transfer. We previously described the lower trapezius transfer using a 2-incision approach, which includes a medial incision to harvest the lower trapezius and lateral transacromial incision to expose the rotator cuff and then perform the transfer through a deep tunnel connecting these 2 sites. In this report, we describe an arthroscopic-assisted technique of lower trapezius transfer augmented with an Achilles tendon allograft to reconstruct an irreparable posterior-superior rotator cuff tear...
October 2016: Arthroscopy Techniques
https://www.readbyqxmd.com/read/27909125/ageing-deep-vein-thrombosis-and-male-gender-predict-poor-outcome-after-acute-achilles-tendon-rupture
#9
E Domeij- Arverud, P Anundsson, E Hardell, G Barreng, G Edman, A Latifi, F Labruto, P W Ackermann
AIMS: Patients with an acute Achilles tendon rupture (ATR) take a long time to heal, have a high incidence of deep vein thrombosis (DVT) and widely variable functional outcomes. This variation in outcome may be explained by a lack of knowledge of adverse factors, and a subsequent shortage of appropriate interventions. PATIENTS AND METHODS: A total of 111 patients (95 men, 16 women; mean age 40.3, standard deviation 8.4) with an acute total ATR were prospectively assessed...
December 2016: Bone & Joint Journal
https://www.readbyqxmd.com/read/27900179/procollagen-markers-in-microdialysate-can-predict-patient-outcome-after-achilles-tendon-rupture
#10
Md Abdul Alim, Simon Svedman, Gunnar Edman, Paul W Ackermann
OBJECTIVE: Patients who sustain acute Achilles tendon rupture (ATR) exhibit variable and mostly impaired long-term functional, and patient-reported outcomes. However, there exists a lack of early predictive markers of long-term outcomes to facilitate the development of improved treatment methods. The aim of this study was to assess markers of tendon callus production in patients with ATR in terms of outcome, pain, and fatigue. STUDY DESIGN AND SETTING: Prospective cohort study; level of evidence 2...
2016: BMJ Open Sport & Exercise Medicine
https://www.readbyqxmd.com/read/27898509/acute-achilles-tendon-ruptures-an-update-on-treatment
#11
Anish R Kadakia, Robert G Dekker, Bryant S Ho
Acute rupture of the Achilles tendon is common and seen most frequently in people who participate in recreational athletics into their thirties and forties. Although goals of treatment have not changed in the past 15 years, recent studies of nonsurgical management, specifically functional bracing with early range of motion, demonstrate rerupture rates similar to those of tendon repair and result in fewer wound and soft-tissue complications. Satisfactory outcomes may be obtained with nonsurgical or surgical treatment...
November 24, 2016: Journal of the American Academy of Orthopaedic Surgeons
https://www.readbyqxmd.com/read/27895574/robot-assisted-rehabilitation-of-ankle-plantar-flexors-spasticity-a-3-month-study-with-proprioceptive-neuromuscular-facilitation
#12
Zhihao Zhou, Yao Sun, Ninghua Wang, Fan Gao, Kunlin Wei, Qining Wang
In this paper, we aim to investigate the effect of proprioceptive neuromuscular facilitation (PNF)-based rehabilitation for ankle plantar flexors spasticity by using a Robotic Ankle-foot Rehabilitation System (RARS). A modified robot-assisted system was proposed, and seven poststroke patients with hemiplegic spastic ankles participated in a 3-month robotic PNF training. Their impaired sides were used as the experimental group, while their unimpaired sides as the control group. A robotic intervention for the experimental group started from a 2-min passive stretching to warming-up or relaxing the soleus and gastrocnemius muscles and also ended with the same one...
2016: Frontiers in Neurorobotics
https://www.readbyqxmd.com/read/27894329/efficacy-of-early-controlled-motion-of-the-ankle-compared-with-no-motion-after-non-operative-treatment-of-an-acute-achilles-tendon-rupture-study-protocol-for-a-randomized-controlled-trial
#13
Kristoffer Weisskirchner Barfod, Maria Swennergren Hansen, Per Holmich, Anders Troelsen, Morten Tange Kristensen
BACKGROUND: Early controlled ankle motion is widely used in the non-operative treatment of acute Achilles tendon rupture, though its safety and efficacy have never been investigated in a randomized setup. The objectives of this study are to investigate if early controlled motion of the ankle affects functional and patient-reported outcomes. METHODS/DESIGN: The study is performed as a blinded, randomized, controlled trial with patients allocated in a 1:1 ratio to one of two parallel groups...
November 29, 2016: Trials
https://www.readbyqxmd.com/read/27888853/mr-imaging-findings-in-heel-pain
#14
REVIEW
Ching-Di Chang, Jim S Wu
Heel pain is common and due to a variety of osseous and soft tissue disorders. Causes of heel pain can be classified by the anatomic structure in which they arise and include disorders of the (1) Achilles tendon, (2) plantar fascia, (3) calcaneus, (4) bursae, (5) nerves in the hindfoot, (6) and heel pad. Although careful history taking and physical examination are important, imaging plays a vital role in the diagnosis and management of heel pain. MR imaging is the best imaging test to assess pain in the heel...
February 2017: Magnetic Resonance Imaging Clinics of North America
https://www.readbyqxmd.com/read/27888773/the-combined-effects-of-grain-supplementation-and-tenderstretching-on-alpaca-vicugna-pacos-meat-quality
#15
M A Smith, R D Bush, R J van de Ven, D L Hopkins
This study investigated the effects of feeding a mixed grain supplement and tenderstretching (TS) alpaca carcasses on meat quality. A total of 56 castrated 24month old alpacas were divided into two treatments (pasture-only, and pasture plus supplementation). Supplemented groups were fed a mixed grain ration in addition to ad lib pasture for 10weeks. Animals were slaughtered across two kill days (n=28). One half of each carcass was suspended by the pelvis (TS) prior to chilling, and the other half was Achilles tendon hung (AH)...
November 21, 2016: Meat Science
https://www.readbyqxmd.com/read/27885357/achilles-tendinopathy-current-concepts-about-the-basic-science-and-clinical-treatments
#16
REVIEW
Hong-Yun Li, Ying-Hui Hua
Achilles tendinopathy is one of the most frequently ankle and foot overuse injuries, which is a clinical syndrome characterized by the combination of pain, swelling, and impaired performance. The two main categories of Achilles tendinopathy are classified according to anatomical location and broadly include insertional and noninsertional tendinopathy. The etiology of Achilles tendinopathy is multifactorial including both intrinsic and extrinsic factors. Failed healing response and degenerative changes were found in the tendon...
2016: BioMed Research International
https://www.readbyqxmd.com/read/27881831/the-effect-of-suture-anchor-insertion-angle-on-calcaneus-pullout-strength-challenging-the-deadman-s-angle
#17
William M Weiss, Ramon P Saucedo, John D Robinson, Chung-Chieh Jason Lo, Randal P Morris, Vinod K Panchbhavi
: Background Refractory cases of Achilles tendinopathy amenable to surgery may include reattachment of the tendon using suture anchors. However, there is paucity of information describing the optimal insertion angle to maximize the tendon footprint and anchor stability in the calcaneus. The purpose of this investigation is to compare the fixation strength of suture anchors inserted at 90° and 45° (the Deadman's angle) relative to the primary compressive trabeculae of the calcaneus. Methods A total of 12 matched pairs of adult cadaveric calcanei were excised and potted to approximate their alignment in vivo...
November 23, 2016: Foot & Ankle Specialist
https://www.readbyqxmd.com/read/27881830/repair-of-chronic-achilles-ruptures-has-a-high-incidence-of-venous-thromboembolism
#18
Mark J Bullock, William T DeCarbo, Mark H Hofbauer, Joshua D Thun
: Background Despite the low incidence of deep vein thrombosis (DVT) in foot and ankle surgery, some authors report a high incidence of symptomatic DVT following Achilles tendon rupture. The purpose of this study was to identify DVT risk factors inherent to Achilles tendon repair to determine which patients may benefit from prophylaxis. Methods One hundred and thirteen patient charts were reviewed following elective and nonelective Achilles tendon repair. For elective repair of insertional or noninsertional Achilles tendinopathy, parameters examined included lateral versus prone positioning and the presence versus absence of a flexor hallucis longus transfer...
November 23, 2016: Foot & Ankle Specialist
https://www.readbyqxmd.com/read/27881671/sex-based-difference-in-achilles-peritendinous-levels-of-matrix-metalloproteinases-and-growth-factors-after-acute-resistance-exercise
#19
Broc D Astill, Mark S Katsma, David J Cauthon, Jason Greenlee, Mark Murphy, Donald Curtis, Chad C Carroll
Several recent investigations have demonstrated that the ability of various tendons to alter structural and functional properties in response to exercise are muted in women when compared to men. We hypothesize that this disparity between men and women may be due to a reduced tendon production of key mediators of tendon extracellular matrix (ECM) remodeling in response to mechanical loading, e.g. exercise. Using microdialysis before and after an acute bout of resistance exercise, we evaluated Achilles peritendinous levels of insulin-like growth factor-1 (IGF-1) and interleukin-6 (IL-6), which have both been shown to increase tendon collagen synthesis...
November 23, 2016: Journal of Applied Physiology
https://www.readbyqxmd.com/read/27881176/no-midterm-advantages-in-the-middle-term-using-small-intestinal-submucosa-and-human-amniotic-membrane-in-achilles-tendon-transverse-tenotomy
#20
Yushu Liu, Yinbo Peng, Yong Fang, Min Yao, Robert W Redmond, Tao Ni
BACKGROUND: The study was aimed to compare the effects of small intestinal submucosa (SIS) and human amniotic membrane (HAM) on Achilles tendon healing. METHODS: A total of 48 New Zealand white rabbits were divided into two groups. A full-thickness transverse tenotomy was made at the right leg of the rabbits. Then, the laceration site was wrapped with HAM (P/A group) or SIS (P/S group). The ultimate stress (US) and Young's modulus (E) of the tendons were detected for biomechanical analysis...
November 24, 2016: Journal of Orthopaedic Surgery and Research
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