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https://www.readbyqxmd.com/read/28812041/anthropometric-and-skeletal-parameters-predict-2-strand-semitendinosus-tendon-size-in-double-bundle-anterior-cruciate-ligament-reconstruction
#1
Daisuke Chiba, Eiichi Tsuda, Shizuka Sasaki, Xizhe Liu, Yasuyuki Ishibashi
BACKGROUND: Few studies have examined whether skeletal parameters predict hamstring graft size during anterior cruciate ligament reconstruction (ACLR). PURPOSE/HYPOTHESIS: The purpose of this study was to examine whether preoperative anthropometric and radiographic skeletal parameters could predict hamstring graft size during ACLR. We hypothesized that both anthropometric and skeletal parameters can be used to predict graft size in our double-bundle procedure and that the use of skeletal parameters will improve the accuracy of graft size prediction...
August 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28809626/-structural-damage-to-the-hamstring-graft-due-to-interaction-with-fixation-material-and-its-effect-on-biomechanical-properties-of-acl-reconstruction
#2
J Kautzner, M Držík, M Handl, C Povýšil, P Kos, T Trč, V Havlas
PURPOSE OF THE STUDY Hamstring grafts are commonly used for ACL reconstruction. The purpose of our study is to determine the effects of the suspension fixation compared to graft cross-pinning transfixation, and the effect(s) of structural damage during the preparation of the graft on biomechanical properties of the graft. MATERIAL AND METHODS The design of the study is a cadaveric biomechanical laboratory study. 38 fresh-frozen human hamstring specimens from 19 cadaveric donors were used. The grafts were tested for their loading properties...
2017: Acta Chirurgiae Orthopaedicae et Traumatologiae Cechoslovaca
https://www.readbyqxmd.com/read/28806980/factors-influencing-outcomes-after-medial-hamstring-lengthening-with-semitendinosus-transfer-in-patients-with-cerebral-palsy
#3
Ki Hyuk Sung, Jaebong Lee, Chin Youb Chung, Kyoung Min Lee, Byung Chae Cho, Seung Jun Moon, Jaeyoung Kim, Moon Seok Park
BACKGROUND: Although several studies have investigated the outcomes after distal hamstring lengthening (DHL), no study has undertaken an approach that included all or most of the important factors that could influence the results. This study was performed to evaluate the outcomes after DHL and analyze the factors that influence the improvement and serial change in knee motion after surgery in patients with cerebral palsy (CP), using a linear mixed model (LMM). METHODS: The study included 314 ambulatory CP patients (594 limbs) with spsastic diplegia who were followed up after undergoing DHL as part of a single-event multilevel surgery and who underwent preoperative and postoperative 3-dimensional (3D) gait analyses...
August 14, 2017: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/28806100/including-the-copenhagen-adduction-exercise-in-the-fifa-11-provides-missing-eccentric-hip-adduction-strength-effect-in-male-soccer-players-a-randomized-controlled-trial
#4
Joar Harøy, Kristian Thorborg, Andreas Serner, André Bjørkheim, Linn E Rolstad, Per Hölmich, Roald Bahr, Thor Einar Andersen
BACKGROUND: The FIFA 11+ was developed as a complete warm-up program to prevent injuries in soccer players. Although reduced hip adduction strength is associated with groin injuries, none of the exercises included in the FIFA 11+ seem to specifically target hip adduction strength. PURPOSE: To investigate the effect on eccentric hip adduction strength of the FIFA 11+ warm-up program with or without the Copenhagen adduction exercise. STUDY DESIGN: Randomized controlled trial; Level of evidence, 1...
August 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28803367/the-role-of-agonist-and-antagonist-muscles-in-explaining-isometric-knee-extension-torque-variation-with-hip-joint-angle
#5
Theodoros M Bampouras, Neil D Reeves, Vasilios Baltzopoulos, Constantinos N Maganaris
PURPOSE: The biarticular rectus femoris (RF), operating on the ascending limb of the force-length curve, produces more force at longer lengths. However, experimental studies consistently report higher knee extension torque when supine (longer RF length) compared to seated (shorter RF length). Incomplete activation in the supine position has been proposed as the reason for this discrepancy, but differences in antagonistic co-activation could also be responsible due to altered hamstrings length...
August 12, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28803035/bone-tunnel-change-develops-within-two-weeks-of-double-bundle-anterior-cruciate-ligament-reconstruction-using-hamstring-autograft-a-comparison-of-different-postoperative-immobilization-periods-using-computed-tomography
#6
Ryo Shimizu, Nobuo Adachi, Minoru Ishifuro, Atsuo Nakamae, Masakazu Ishikawa, Masataka Deie, Mitsuo Ochi
BACKGROUND: The purpose of this study was to evaluate bone tunnel changes following anterior cruciate ligament (ACL) reconstruction during the early postoperative period using computed tomography (CT), and to understand the impact of postoperative immobilization on these changes. METHODS: Twenty patients who underwent double-bundle ACL reconstruction using hamstring tendon autografts were included. We subcategorized patients into two groups: patients who underwent isolated ACL reconstruction and had three days of knee immobilization (Group A, n=10); and patients with concomitant meniscus injuries who underwent ACL reconstruction and meniscus repair simultaneously (Group B, n=10) had their knees immobilized for two weeks after surgery...
August 9, 2017: Knee
https://www.readbyqxmd.com/read/28801415/randomised-feasibility-trial-into-the-effects-of-low-frequency-electrical-muscle-stimulation-in-advanced-heart-failure-patients
#7
Stuart Ennis, Gordon McGregor, Thomas Hamborg, Helen Jones, Robert Shave, Sally J Singh, Prithwish Banerjee
OBJECTIVES: Low-frequency electrical muscle stimulation (LF-EMS) may have the potential to reduce breathlessness and increase exercise capacity in the chronic heart failure population who struggle to adhere to conventional exercise. The study's aim was to establish if a randomised controlled trial of LF-EMS was feasible. DESIGN AND SETTING: Double blind (participants, outcome assessors), randomised study in a secondary care outpatient cardiac rehabilitation programme...
August 11, 2017: BMJ Open
https://www.readbyqxmd.com/read/28800920/does-platelet-rich-plasma-lead-to-earlier-return-to-sport-when-compared-with-conservative-treatment-in-acute-muscle-injuries-a-systematic-review-and-meta-analysis
#8
Ujash Sheth, Tim Dwyer, Ira Smith, David Wasserstein, John Theodoropoulos, Sachdeep Takhar, Jaskarndip Chahal
PURPOSE: To compare the time to return to sport and reinjury rate after platelet-rich plasma (PRP) injection versus control therapy (i.e., physiotherapy or placebo injection) in patients with acute grade I or II muscle strains. METHODS: All eligible studies comparing PRP against a control in the treatment of acute (≤7 days) grade I or II muscle strains were identified. The primary outcome was time to return to play. The secondary outcome was the rate of reinjury at a minimum of 6 months of follow-up...
August 8, 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/28800919/similar-outcomes-after-osteochondral-allograft-transplantation-in-anterior-cruciate-ligament-intact-and-reconstructed-knees-a-comparative-matched-group-analysis-with-minimum-2-year-follow-up
#9
Dean Wang, Claire D Eliasburg, Tim Wang, Ryan R Fader, Francesca R Coxe, Mollyann D Pais, Riley J Williams
PURPOSE: To compare failure rates and clinical outcomes of osteochondral allograft transplantation (OCA) in anterior cruciate ligament (ACL)-intact versus ACL-reconstructed knees at midterm follow-up. METHODS: After a priori power analysis, a prospective registry of patients treated with OCA for focal chondral lesions ≥2 cm(2) in size with minimum 2-year follow-up was used to match ACL-reconstructed knees with ACL-intact knees by age, sex, and primary chondral defect location...
August 8, 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/28797872/the-diameter-of-single-bundle-hamstring-autograft-does-not-significantly-influence-revision-rate-or-clinical-outcomes-after-anterior-cruciate-ligament-reconstruction
#10
Gregory C Wernecke, Alex Constantinidis, Ian A Harris, Bradley G Seeto, Darren B Chen, Samuel J MacDessi
BACKGROUND: Anterior cruciate ligament (ACL) graft failure is a complication of ACL reconstruction (ALCR). Smaller autograft diameter may be a contributing factor. Our aim was to determine if hamstring autograft diameter influences graft rupture and patient-reported outcome scores. METHODS: This study included 786 consecutive patients undergoing primary, single bundle, autograft hamstring ACLR. The primary outcome was revision ACLR surgery. Secondary outcomes were patient reported International Knee Documentation Committee (IKDC) score, Knee Injury & Osteoarthritis Outcome Score (KOOS) and Tegner Activity score...
August 7, 2017: Knee
https://www.readbyqxmd.com/read/28797871/factors-affecting-knee-laxity-following-anterior-cruciate-ligament-reconstruction-using-a-hamstring-tendon
#11
Shinya Yanagisawa, Masashi Kimura, Keiichi Hagiwara, Atsuko Ogoshi, Tomoyuki Nakagawa, Hiroyuki Shiozawa, Takashi Ohsawa
BACKGROUND: The aim of the present study was to investigate the correlation between the pre-operative and intraoperative factors that predict postoperative knee laxity following anterior cruciate ligament (ACL) reconstruction using a hamstring tendon. METHODS: The subjects included 108 patients (male, n=49; female, n=59) with ACL-deficient knees who had undergone double-bundle reconstruction. The median time between injury and surgery (TBIS) was 27.5weeks (range one to 504)...
August 7, 2017: Knee
https://www.readbyqxmd.com/read/28795071/distal-musculotendinous-t-junction-injuries-of-the-biceps-femoris-an-mri-case-review
#12
Tom Entwisle, Yuan Ling, Alex Splatt, Peter Brukner, David Connell
BACKGROUND: Injury to the distal musculotendinous T junction (DMTJ) of the biceps femoris is a distinct clinical entity that behaves differently from other hamstring injuries due to its complex, multicomponent anatomy and dual innervation. Injury in this region demonstrates a particularly high rate of recurrence, even with prolonged rehabilitation times. PURPOSE: To describe the anatomy of the DMTJ of the biceps femoris and analyze the injury patterns seen on magnetic resonance imaging (MRI) to aid prognosis and rehabilitation and minimize the risk of recurrence...
July 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28789873/double-bundle-anterior-cruciate-ligament-reconstruction-with-and-without-remnant-preservation-comparison-of-early-postoperative-outcomes-and-complications
#13
Hiroshi Nakayama, Syunichiro Kambara, Tomoya Iseki, Ryo Kanto, Kenji Kurosaka, Shinichi Yoshiya
BACKGROUND: To compare the early postoperative outcomes and complications of double-bundle anterior cruciate ligament (ACL) reconstruction with and without remnant preservation. METHODS: The study population comprised 125 consecutive knees that underwent double-bundle ACL reconstruction using hamstring autograft. Among the 125 knees, remnant preservation was indicated for 50 knees, while standard double-bundle reconstruction was performed in the remaining 75 knees...
August 5, 2017: Knee
https://www.readbyqxmd.com/read/28789872/mechanical-analysis-of-extra-articular-knee-ligaments-part-two-tendon-grafts-used-for-knee-ligament-reconstruction
#14
Kristof Smeets, Johan Bellemans, Lennart Scheys, Bert O Eijnde, Joshua Slane, Steven Claes
OBJECTIVES: The aim of this study was to provide information about the mechanical properties of grafts used for knee ligament reconstructions and to compare those results with the mechanical properties of native knee ligaments. METHODS: Eleven cadaveric knees were dissected for the semitendinosus, gracilis, iliotibial band (ITB), quadriceps and patellar tendon. Uniaxial testing to failure was performed using a standardized method and mechanical properties (elastic modulus, ultimate stress, ultimate strain, strain energy density) were determined...
August 5, 2017: Knee
https://www.readbyqxmd.com/read/28783555/hamstring-and-calf-muscle-activation-as-a-function-of-bodyweight-support-during-treadmill-running-in-acl-reconstructed-athletes
#15
Clint Hansen, Einar Einarson, Athol Thomson, Rodney Whiteley, Erik Witvrouw
Rehabilitation after injury and reconstruction to the anterior cruciate ligament is thought to require a gradual reintroduction of loading, particularly during resumption of running. One strategy to achieve this is via the use of a reduced-gravity treadmill but it is unknown, if and how muscle activity varies in the reduced gravity conditions compared to regular treadmill running. Nineteen healthy participants and 18 male patients at the end of their rehabilitation (8 with a bone-patellar-bone graft, 10 with a hamstring graft) participated in this multi-muscle surface electromyography (sEMG) running study...
July 29, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28782698/anatomical-knee-postero-lateral-corner-reconstruction-the-versailles-technique
#16
J Murgier, P Boisrenoult, C Steltzlen, P Beaufils, N Pujol
Postero-lateral knee instability raises surgical challenges. Of the many available reconstruction techniques, few ensure anatomical reconstruction of the postero-lateral corner (PLC). The "Versailles" technique ensures the anatomical reconstruction of the three main PLC stabilisers (lateral collateral ligament, popliteus tendon, and popliteo-fibular ligament)by using either a hamstring autograft or a tendon allograft.
August 3, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28781974/do-major-league-baseball-team-physicians-harvest-the-semitendinosus-from-the-drive-leg-or-landing-leg-when-performing-ulnar-collateral-ligament-reconstruction-on-elite-baseball-pitchers
#17
Brandon J Erickson, Peter N Chalmers, Jeffrey R Dugas, Bernard R Bach, Gregory P Nicholson, Nikhil N Verma, Christopher S Ahmad, Anthony A Romeo
BACKGROUND: Hamstring autograft is a common graft choice when performing ulnar collateral ligament reconstruction (UCLR). PURPOSE/HYPOTHESIS: The purpose of this study was to survey Major League Baseball (MLB) team physicians and determine whether these physicians harvest the hamstring (semitendinosus or gracilis) from the drive leg (ipsilateral to surgical site) or landing leg (contralateral to surgical site) when performing UCLR on elite-level pitchers. The hypothesis was that the majority of surgeons harvest the hamstring from the drive leg when performing a UCLR...
July 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28772319/imaging-of-acute-hamstring-muscle-strain-injuries
#18
Simon Dimmick, James M Linklater
No abstract text is available yet for this article.
September 2017: Seminars in Musculoskeletal Radiology
https://www.readbyqxmd.com/read/28770299/morphological-and-molecular-characterization-of-human-hamstrings-shows-that-tendon-features-are-not-influenced-by-donor-age
#19
Nicoletta Gagliano, Alessandra Menon, Federico Cabitza, Riccardo Compagnoni, Pietro Randelli
PURPOSE: Age-related modifications of tendons, such as reduced tenocyte proliferation and modified extracellular matrix (ECM) turnover, have been previously described, but results are often incomplete and discordant. The aim of this study was to investigate, using morphological and molecular methods, the effect of ageing on human tendons and tenocytes, especially focusing on the collagen turnover pathways, in order to understand how the ageing process could influence tendon biology and structure...
August 2, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28768476/pan-genome-and-phylogeny-of-bacillus-cereus-sensu-lato
#20
Adam L Bazinet
BACKGROUND: Bacillus cereus sensu lato (s. l.) is an ecologically diverse bacterial group of medical and agricultural significance. In this study, I use publicly available genomes and novel bioinformatic workflows to characterize the B. cereus s. l. pan-genome and perform the largest phylogenetic and population genetic analyses of this group to date in terms of the number of genes and taxa included. With these fundamental data in hand, I identify genes associated with particular phenotypic traits (i...
August 2, 2017: BMC Evolutionary Biology
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