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Achilles tendonitis

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https://www.readbyqxmd.com/read/28944585/loading-rate-and-contraction-duration-effects-on-in%C3%A2-vivo-human-achilles-tendon-mechanical-properties
#1
Christopher McCrum, Kai D Oberländer, Gaspar Epro, Peter Krauss, Darren C James, Neil D Reeves, Kiros Karamanidis
Tendons are viscoelastic, which implies loading rate dependency, but loading rates of contractions are often not controlled during assessment of human tendon mechanical properties in vivo. We investigated the effects of sustained submaximal isometric plantarflexion contractions, which potentially negate loading rate dependency, on the stiffness of the human Achilles tendon in vivo using dynamometry and ultrasonography. Maximum voluntary contractions (high loading rate), ramp maximum force contractions with 3 s loading (lower loading rate) and sustained contractions (held for 3 s) at 25%, 50% and 80% of maximal tendon force were conducted...
September 24, 2017: Clinical Physiology and Functional Imaging
https://www.readbyqxmd.com/read/28943056/imaging-modalities-in-the-diagnosis-and-monitoring-of-achilles-tendon-ruptures-a-systematic-review
#2
REVIEW
Olivier C Dams, Inge H F Reininga, Jan L Gielen, Inge van den Akker-Scheek, Johannes Zwerver
OBJECTIVE: To determine the role of imaging in the diagnosis and monitoring of the Achilles tendon rupture (ATR). STUDY DESIGN: Systematic review. DATA SOURCES: PubMed and EMBASE in November 2016. ELIGIBILITY CRITERIA: Clinical studies providing information on the methods and role of imaging in the diagnosis and monitoring of the ATR were included. RESULTS: Fifty-six studies were included, most concerning the use of ultrasound (n=37) or MRI (n=18)...
September 18, 2017: Injury
https://www.readbyqxmd.com/read/28940714/tear-drop-free-anterolateral-thigh-flap-a-versatile-design-for-lower-limb-reconstruction-after-trauma
#3
Sergio Razzano, Samir Ramadan, Andrea Figus, Richard M Haywood
BACKGROUND: In lower limb reconstruction the cosmetic outcome is influenced by the contouring of the flap at the recipient site as well as by the donor site closure. It is also important to minimise compression of the flap pedicle. We discuss the outcomes of a versatile ALT flap design that allows freedom in skin paddle tailoring without elongating the scar, reduction of the tension over the pedicle and improved cosmetic results of both donor and recipient sites. METHODS: Between January 2009 and October 2015, 27 patients underwent reconstruction using tear drop ALTs...
September 21, 2017: Microsurgery
https://www.readbyqxmd.com/read/28937784/lacertus-fibrosus-versus-achilles-allograft-reconstruction-for-distal-biceps-tears-a-biomechanical-study
#4
Anand M Murthi, Miguel A Ramirez, Brent G Parks, Shannon R Carpenter
BACKGROUND: The bicipital aponeurosis, or lacertus fibrosus, can potentially be used as a reconstruction graft in chronic distal biceps tendon tears. PURPOSE: To evaluate construct stiffness, load to failure, and failure mechanism with lacertus fibrosus versus Achilles allograft for distal biceps tendon reconstruction. STUDY DESIGN: Controlled laboratory study. METHODS: Ten fresh-frozen matched cadaveric pairs of elbows were used...
September 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28932308/ultrasonographic-enthesopathy-and-disease-activity-in-psoriatic-arthritis
#5
Mohieldin M Ahmed, Gehan Gamal Elolemy, Aziz K Alfeeli, Ayyoub B Baqer, Adela M Gad
BACKGROUND: To our knowledge, the correlation between ultrasonographic enthesopathy and severity in psoriatic arthritis (PsA) has been done before. However, the correlation between ultrasonography of enthesopathy and the Psoriatic Arthritis Disease Activity Score (PASDAS) have not been done. AIM: To compare the results of ultrasonographic enthesopathy of foot and PASDAS in PsA. MATERIALS AND METHODS: A total of 65 PsA patients were involved and divided into two groups...
August 15, 2017: Open Access Macedonian Journal of Medical Sciences
https://www.readbyqxmd.com/read/28929998/calcaneal-tendon-collagen-fiber-morphometry-and-aging
#6
Daniel Hadraba, Jiri Janacek, Eva Filova, Frantisek Lopot, Rik Paesen, Ondrej Fanta, Anneliese Jarman, Alois Necas, Marcel Ameloot, Karel Jelen
Fibrillar collagen in tendons and its natural development in rabbits are discussed in this paper. Achilles tendons from newborn (~7 days) to elderly (~38 months) rabbits were monitored in intact (n tendons=24) and microtome sectioned (n tendons=11) states with label-free second harmonic generation microscopy. After sectioning, the collagen fiber pattern was irregular for the younger animals and remained oriented parallel to the load axis of the tendon for the older animals. In contrast, the collagen fiber pattern in the intact samples followed the load axis for all the age groups...
September 20, 2017: Microscopy and Microanalysis
https://www.readbyqxmd.com/read/28926379/tendon-length-calf-muscle-atrophy-and-strength-deficit-after-acute-achilles-tendon-rupture-long-term-follow-up-of-patients-in-a-previous-study
#7
Juuso Heikkinen, Iikka Lantto, Juuso Piilonen, Tapio Flinkkilä, Pasi Ohtonen, Pertti Siira, Vesa Laine, Jaakko Niinimäki, Ari Pajala, Juhana Leppilahti
BACKGROUND: In this prospective study, we used magnetic resonance imaging (MRI) to assess long-term Achilles tendon length, calf muscle volume, and muscle fatty degeneration after surgery for acute Achilles tendon rupture. METHODS: From 1998 to 2001, 60 patients at our center underwent surgery for acute Achilles tendon rupture followed by early functional postoperative rehabilitation. Fifty-five patients were reexamined after a minimum duration of follow-up of 13 years (mean, 14 years), and 52 of them were included in the present study...
September 20, 2017: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/28921035/-midportion-achilles-tendinopathy
#8
REVIEW
J Weber, T Buchhorn
Although the incidence of midportion Achilles tendinopathy is under 1% in the general population, it is quite a common disease in runners that is characterized by the symptom triad of pain, swelling and impaired physical performance. Pain and swelling are located in the area 2 to 7 cm proximal the tendon insertion onto the calcaneus.Diagnosis is made by adequate clinical symptoms and corresponding findings in sonography and/or magnetic resonance imaging scans. Histopathologically, mostly degenerative changes in the tendon structure are found, sometimes accompanied by intra- and paratendinous inflammation...
September 18, 2017: Der Unfallchirurg
https://www.readbyqxmd.com/read/28918357/long-term-follow-up-after-tibialis-anterior-tendon-shortening-in-combination-with-achilles-tendon-lengthening-in-spastic-equinus-in-cerebral-palsy
#9
Michèle Kläusler, Bernhard Maria Speth, Reinald Brunner, Oren Tirosh, Carlo Camathias, Erich Rutz
Using Tibialis Anterior Shortening (TATS) in combination with Achilles Tendon Lengthening (TAL) to treat spastic equinus in children with cerebral palsy (CP) was described in 2011. Short-term results have indicated a good outcome, especially an improvement of the drop foot in swing phase and the correction of equinus in stance phase. The aim of this study was to analyse the results of the long-term follow-up and to determine the relapse rate of TATS and TAL. The kinematics of the sagittal, frontal and transversal planes were measured by using instrumented 3D gait analysis at three defined time points and then described using the Gait Profile Score (GPS) and Movement Analysis Profile (MAP)...
August 30, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28916838/functionally-distinct-tendons-from-elastin-haploinsufficient-mice-exhibit-mild-stiffening-and-tendon-specific-structural-alteration
#10
Jeremy D Eekhoff, Fei Fang, Lindsey G Kahan, M G Espinosa, Austin J Cocciolone, Jessica E Wagenseil, Robert P Mecham, Spencer P Lake
Elastic fibers are present in low quantities in tendon, where they are located both within fascicles near tenocytes and more broadly in the interfascicular matrix. While elastic fibers have long been known to be significant in the mechanics of elastin-rich tissue (i.e. vasculature, skin, lungs), recent studies have suggested a mechanical role for elastic fibers in tendons that is dependent on specific tendon function. However, the exact contribution of elastin to properties of different types of tendons (e...
September 16, 2017: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/28913879/short-t2-imaging-using-a-3d-double-adiabatic-inversion-recovery-prepared-ultrashort-echo-time-cones-3d-dir-ute-cones-sequence
#11
Ya-Jun Ma, Yanchun Zhu, Xing Lu, Michael Carl, Eric Y Chang, Jiang Du
PURPOSE: To investigate high contrast imaging of short T2 tissues with a three-dimensional double adiabatic inversion recovery prepared ultrashort echo time Cones (3D DIR-UTE-Cones) sequence. METHODS: The sequence used two sequential adiabatic inversion pulses to suppress signals from long T2 tissues, followed by multispoke UTE acquisition to detect signals from short T2 tissues. The two adiabatic inversion pulses are identical with a center frequency located at the water peak, but the spectral width is broad enough to cover both water and fat frequencies...
September 14, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28902469/time-dependent-changes-in-the-structure-of-calcified-fibrocartilage-in-the-rat-achilles-tendon-bone-interface-with-sciatic-denervation
#12
Hideaki Takahashi, Hiroyuki Tamaki, Mineo Oyama, Noriaki Yamamoto, Hideaki Onishi
The enthesis transmits a physiological load from soft to hard tissue via fibrocartilage. The histological alterations induced by this physiological loading remain unclear. This study was performed to examine the histomorphological alterations in the collagen fiber bundle alignment and depth of collagen interdigitation between the calcified fibrocartilage and the bone. We examined the Achilles enthesis of rats with sciatic denervation to explore the mechanical effects of structural changes in the enthesis. The parallelism of the collagen fiber bundles was significantly reduced 8 weeks after denervation...
September 13, 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/28901376/mechanical-loading-modulates-heterotopic-ossification-in-calcific-tendinopathy-through-the-mtorc1-signaling-pathway
#13
Guorong Chen, Huaji Jiang, Xinggui Tian, Jiajun Tang, Xiaochun Bai, Zhongmin Zhang, Liang Wang
Excessive mechanical loading is a major factor affecting heterotopic ossification (HO), which is a major pathological alteration in calcific tendinopathy. However, physical therapies with mechanical loading as the functional element have exhibited promising results in the treatment of calcific tendinopathy. The dual effects that mechanical loading may have on the pathogenesis and rehabilitation of calcified tendinopathy remain unclear. The present study was designed to investigate the effects of mechanical loading on HO in calcific tendinopathy...
August 29, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28898538/longitudinal-slit-procedure-combined-with-negative-pressure-wound-therapy-for-exposed-achilles-tendons
#14
Tino Wetzig, Diana Kohn
No abstract text is available yet for this article.
September 12, 2017: Journal der Deutschen Dermatologischen Gesellschaft, Journal of the German Society of Dermatology: JDDG
https://www.readbyqxmd.com/read/28891441/tissue-engineering-in-achilles-tendon-reconstruction-a-systematic-review-of-preclincal-studies
#15
Saqib Mir, Reza Mafi, Pouya Mafi, Wasim Khan
Background Tissue engineering is now being used in Achilles tendon (AT) repair in animal models. There are many preclinical studies that have used different types of stem cells for AT repair. However, there are no systematic reviews that evaluate all these studies to see which type of stem cell provides the most improvement for AT repair in animal models. Sahni V et al.,(1) divided the multiple stem cell types into three broad categories; Tendon derived stem cells (TDSCs), mesenchymal stem cells (MSCs) and embryonic stem cells (ESCs)...
September 6, 2017: Current Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/28891323/functional-outcome-of-acute-achilles-tendon-rupture-with-and-without-operative-treatment-using-identical-functional-bracing-protocol
#16
Che Siu Lim, David Lees, David P Gwynne-Jones
BACKGROUND: The purpose of this study was to compare the functional results of operative and nonoperative treatment of acute Achilles tendon rupture using an identical rehabilitation program of functional bracing. METHODS: Over a 10-year period, 200 patients (99 operative, 101 nonoperative) aged between 18 and 65 years were treated at our institution's physiotherapy department after acute Achilles tendon rupture. There were 132 patients (62 operative, 70 nonoperative) available for a minimum 2-year follow-up (average 6...
September 1, 2017: Foot & Ankle International
https://www.readbyqxmd.com/read/28891314/correlation-between-recovery-of-triceps-surae-muscle-strength-and-level-of-activity-after-open-repair-of-acute-achilles-tendon-rupture
#17
Seikai Toyooka, Hideki Takeda, Kohei Nakajima, Atsushi Masujima, Wataru Miyamoto, Gherardo Pagliazzi, Takumi Nakagawa, Hirotaka Kawano
BACKGROUND: This study aimed to determine whether physical findings reflecting triceps surae strength recovery could predict return to activities such as jogging and sports and whether patients' age and sex would influence recovery of triceps surae strength postoperatively. METHODS: Between 2009 and 2013, 96 consecutive cases of postoperative acute Achilles tendon rupture were reviewed. The postoperative triceps surae strength recovery rate was investigated in all patients by using half body weight 1-time heel rise, full body weight (FBW) 1-time heel rise, FBW 20-time heel rise, jogging, and full return to sports activities...
September 1, 2017: Foot & Ankle International
https://www.readbyqxmd.com/read/28884594/predicting-failure-of-nonoperative-treatment-for-insertional-achilles-tendinosis
#18
James F Stenson, Christopher W Reb, Joseph N Daniel, Sundeep S Saini, Mohammed F Albana
Nonoperative treatment for midportion Achilles tendinosis is well defined by the literature. Multiple modalities are described for the management of insertional Achilles pathology, but no consensus exists regarding efficacy. Surgical intervention for insertional Achilles tendinosis (IAT) is successful greater than 80% of the time. Our objective was to risk stratify patients who would fail nonsurgical management of IAT and thus benefit progressing to surgery. We reviewed the records of 664 patients with IAT...
September 1, 2017: Foot & Ankle Specialist
https://www.readbyqxmd.com/read/28883087/modulation-of-muscle-tendon-interaction-in-the-human-triceps-surae-during-an-energy-dissipation-task
#19
Amelie Werkhausen, Kirsten Albracht, Neil J Cronin, Rahel Meier, Jens Bojsen-Møller, Olivier R Seynnes
The compliance of elastic elements allows muscles to dissipate energy safely during eccentric contractions. This buffering function is well documented in animal models but our understanding of its mechanism in humans is confined to non-specific tasks, requiring a subsequent acceleration of the body. The present study aimed to examine the behaviour of the human triceps surae muscle-tendon unit (MTU) during a pure energy dissipation task, under two loading conditions.Thirty-nine subjects performed a single-leg landing task, with- and without added mass...
September 7, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28882159/estrogen-attenuates-the-spondyloarthritis-manifestations-of-the-skg-arthritis-model
#20
Hyemin Jeong, Eun-Kyung Bae, Hunnyun Kim, Yeong Hee Eun, In Young Kim, Hyungjin Kim, Jaejoon Lee, Chan Hong Jeon, Eun-Mi Koh, Hoon-Suk Cha
BACKGROUND: Ankylosing spondylitis (AS) is a male-predominant disease, and radiographic evidence of damage is also more severe in males. Estrogen modulates immune-related processes such as T cell differentiation and cytokine production. This study aimed to evaluate the effect of estrogen on the disease activity of spondyloarthritis (SpA). METHODS: The effects of estrogen on the development of arthritis were evaluated by performing ovariectomy and 17β-estradiol (E2) pellet implantation in zymosan-treated SKG mice...
September 7, 2017: Arthritis Research & Therapy
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