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https://www.readbyqxmd.com/read/29353311/effects-of-wrist-tendon-vibration-and-eye-movements-on-manual-aiming
#1
Ann Lavrysen, Oron Levin, Matthieu P Boisgontier, Digby Elliott, Werner F Helsen
In the present study, we investigated whether visual information mediates a proprioceptive illusion effect induced by muscle tendon vibration in manual aiming. Visual information was gradually degraded from a situation in which the targets were present and participants (n = 20; 22.3 ± 2.7 years) were permitted to make saccadic eye movements to designated target positions, to a condition in which the targets were not visible and participants were required to perform cyclical aiming while fixating a point between the two target positions...
January 20, 2018: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/29353150/biodegradable-spacer-reduces-the-subacromial-pressure-a-biomechanical-cadaver-study
#2
Yan Chevalier, Matthias F Pietschmann, Christoph Thorwächter, Ofir Chechik, Eliyahu Adar, Assaf Dekel, Peter E Müller
BACKGROUND: Failure after rotator cuff repair remains a major clinical problem and could be related to excessive pressures from the acromion. Previous studies with irreparable tears showed good clinical results of tendon healing with arthroscopic insertion of a protective biodegradable spacer balloon between the repaired tendon and the acromion. One hypothesis is that compression pressures on the repaired tendon will be reduced by the spacer. This cadaver study aimed to investigate the effects of this subacromial spacer on compression pressures over a repaired supraspinatus tendon in passive motion...
December 18, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/29352963/three-dimensional-visualization-of-extracellular-matrix-networks-during-murine-development
#3
Andrea Acuna, Michael A Drakopoulos, Yue Leng, Craig J Goergen, Sarah Calve
The extracellular matrix (ECM) plays a crucial role in embryogenesis, serving both as a substrate to which cells attach and as an active regulator of cell behavior. However, little is known about the spatiotemporal expression patterns and 3D structure of ECM proteins during embryonic development. The lack of suitable methods to visualize the embryonic ECM is largely responsible for this gap, posing a major technical challenge for biologists and tissue engineers. Here, we describe a method of viewing the 3D organization of the ECM using a polyacrylamide-based hydrogel to provide a 3D framework within developing murine embryos...
January 15, 2018: Developmental Biology
https://www.readbyqxmd.com/read/29352758/-arthroscopic-rotator-cuff-surgery-new-and-established-methods
#4
REVIEW
S Pauly, M Scheibel
This present article summarizes established and current developments and aspects of rotator cuff surgery. Achieved milestones as well as current approaches are presented and assessed with respect to their clinical and radiographic impact. Despite biomechanical and technical improvements in modern rotator cuff repair techniques, re-defect and re-tearing rates could not be fully eliminated. Meanwhile, the importance of biological processes around successful tendon-bone reintegration has been increasingly recognized...
January 19, 2018: Der Orthopäde
https://www.readbyqxmd.com/read/29352495/ultrasonographic-based-predictive-factors-influencing-successful-return-to-racing-after-superficial-digital-flexor-tendon-injuries-in-flat-racehorses-a-retrospective-cohort-study-in-469-thoroughbred-racehorses-in-hong-kong
#5
R Alzola, C Easter, C M Riggs, D S Gardner, S L Freeman
BACKGROUND: Superficial digital flexor tendon (SDFT) injury is an important health and welfare concern in racehorses. It is generally diagnosed with ultrasonography, predictive ultrasonographic features have not been reported. OBJECTIVES: To determine ultrasonographic features of forelimb SDFT injury at initial presentation in Thoroughbred racehorses, that could predict a successful return to racing (completing ≥5 races). STUDY DESIGN: Retrospective cohort study...
January 20, 2018: Equine Veterinary Journal
https://www.readbyqxmd.com/read/29351870/de-novo-generation-in-an-in-vivo-rat-model-and-biomechanical-characterization-of-autologous-transplants-for-ligament-and-tendon-reconstruction
#6
Marc Soubeyrand, Elisabeth Laemmel, Nathalie Maurel, Amadou Diop, Thierry Lazure, Jacques Duranteau, Eric Vicaut
BACKGROUND: Surgical reconstruction of ligaments and tendons is frequently required in clinical practice. The commonly used autografts, allografts, or synthetic transplants present limitations in terms of availability, biocompatibility, cost, and mechanical properties that tissue bioengineering aims to overcome. It classically combines an exogenous extracellular matrix with cells, but this approach remains complex and expensive. Using a rat model, we tested a new bioengineering strategy for the in vivo and de novo generation of autologous grafts without the addition of extracellular matrix or cells, and analyzed their biomechanical and structural properties...
December 14, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/29351558/analysis-of-500-anterior-cruciate-ligament-reconstructions-from-a-private-institutional-register
#7
Lauro Augusto Costa, Noel Oizerovici Foni, Eliane Antonioli, Rogério Teixeira de Carvalho, Isabela Dias Paião, Mário Lenza, Mário Ferretti
PURPOSE: The aims of this study are to describe the epidemiological characteristics of anterior cruciate ligament reconstructions in a private hospital in Brazil and to determine trends in medical practice for comparison with previous studies. METHODS: We retrospectively reviewed the anterior cruciate ligament institutional register to obtain data from all patients who underwent primary anterior cruciate ligament reconstruction from July 2014 to June 2016. Descriptive statistics were used to summarize the sample...
2018: PloS One
https://www.readbyqxmd.com/read/29351182/the-management-of-partial-zone-ii-intrasynovial-flexor-tendon-lacerations-a-literature-review-of-biomechanics-clinical-outcomes-and-complications
#8
Kyle D Lineberry, Shirley Shue, Kyle J Chepla
BACKGROUND: Penetrating trauma or lacerations within zone II of the flexor sheath may result in partial tendon injury. The proper management of this injury is controversial; the literature contains differing indications for surgical treatment and post-operative rehabilitation. METHODS: A literature review of the Cochrane, Medline and Pubmed databases was performed using the following search criteria: partial, flexor, tendon, laceration. All English language studies that evaluated biomechanical strength, complications, and outcomes after partial tendon injury in human and animal studies were included and reviewed by two of the authors...
January 12, 2018: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/29350647/rotator-cuff-calcific-tendinopathy-from-diagnosis-to-treatment
#9
Vito Chianca, Domenico Albano, Carmelo Messina, Federico Midiri, Giovanni Mauri, Alberto Aliprandi, Michele Catapano, Lorenzo Carlo Pescatori, Cristian Giuseppe Monaco, Salvatore Gitto, Anna Pisani Mainini, Angelo Corazza, Santi Rapisarda, Grazia Pozzi, Antonio Barile, Carlo Masciocchi, Luca Maria Sconfienza
Rotator cuff calcific tendinopathy (RCCT) is a very common condition caused by the presence of calcific deposits in the rotator cuff (RC) or in the subacromial-subdeltoid (SASD) bursa when calcification spreads around the tendons. The pathogenetic mechanism of RCCT is still unclear. It seems to be related to cell-mediated disease in which metaplastic transformation of tenocytes into chondrocytes induces calcification inside the tendon of the RC. RCCT is a frequent finding in the RC that may cause significant shoulder pain and disability...
January 19, 2018: Acta Bio-medica: Atenei Parmensis
https://www.readbyqxmd.com/read/29349817/anatomical-study-of-the-so-called-retromolar-gland-distinguishing-normal-anatomy-from-oral-cavity-pathology
#10
Joe Iwanaga, Ken Nakamura, Fernando Alonso, Christie Kirkpatrick, Rod J Oskouian, Koichi Watanabe, R Shane Tubbs
INTRODUCTION: The minor salivary glands in the retromolar trigone have rarely been studied. The aim of this study was to better define the anatomy of the minor salivary glands in the retromolar trigone and establish the relationships between these and adjacent structures. MATERIALS AND METHODS: The gland in the retromolar trigone was exposed and its relationships to surrounding structures were observed on twenty cadaveric sides. RESULTS: The boundaries of the gland included the superior pharyngeal constrictor muscle, the tendon of the buccinator muscle, and loose connective tissue...
January 19, 2018: Clinical Anatomy
https://www.readbyqxmd.com/read/29349031/modified-elmslie-trillat-procedure-for-distal-realignment-of-patella-tendon
#11
Ricardo Bastos Filho, Alberto Monteiro, Renato Andrade, M J S Fredrick Michael, Nuno Sevivas, Bruno Pereira, André Sarmento, João Espregueira-Mendes
Patellofemoral dysfunction, due to either a patellofemoral malalignment or patellar instability, is a complex and debilitating condition that significantly decreases the knee function. Conservative management may yield significant clinical outcomes; however, when morphologic anomalies are identified, the surgical approach should be employed. Hence, several surgical procedures have been described in the scientific literature aiming the correction of underlying extensor mechanism malalignments. Still, the rate of complications is higher than desirable...
December 2017: Arthroscopy Techniques
https://www.readbyqxmd.com/read/29349030/augmentation-of-patellar-tendon-repair-with-autologous-semitendinosus-graft-porto-technique
#12
João Espregueira-Mendes, Renato Andrade, M J S Fredrick Michael, André Sarmento, Nuno Sevivas, Rui Rocha, Ricardo Bastos Filho
Patellar tendon ruptures can lead to significant functional deficiency of the extensor mechanism of the knee. These injuries, because of their inherent nature and associated complications, may require a complex treatment and remains a challenge for orthopaedic surgeons. Current surgical techniques present significant complications, including patellar fracture, damage to patellar articular cartilage, and abnormal patella height. This note describes a surgical technique to provide an additional reinforcement to the patellar tendon repair with a semitendinous autograft, without the necessity to perform any transosseous tunnels at the patella bone...
December 2017: Arthroscopy Techniques
https://www.readbyqxmd.com/read/29349025/anterior-capsule-reconstruction-for-irreparable-subscapularis-tears
#13
Jason P Rogers, Adam Kwapisz, John M Tokish
A subscapularis complete tear presents its own challenges in management. The glenohumeral biomechanics and force couple are reliant on a competent and functioning subscapularis muscle. An irreparable subscapularis makes those same challenges even more difficult to address. Traditionally, this problem has been addressed with tendon transfers, including pectoralis major or latissimus dorsi. These techniques can alter the ideal biomechanics of the shoulder and have high rates or failure. Iliotibial autograft or tibialis anterior have also been wrought with high failure rates...
December 2017: Arthroscopy Techniques
https://www.readbyqxmd.com/read/29349024/the-crossing-internal-suture-augmentation-technique-to-protect-the-all-inside-anterior-cruciate-ligament-reconstruction-graft
#14
Mohamed Aboalata, Ashraf Elazab, Abdelsamie Halawa, Moheib S Ahmed, Andreas B Imhoff, Yehia Bassiouny
The crossing internal suture augmentation technique is an all-inside technique of anterior cruciate ligament reconstruction with augmentation of the hamstring tendon autograft with a braided ultrahigh-molecular-weight polyester-polyethylene suture tape resting on the adjustable cortical buttons on both the femoral and tibial sides. The internal suture augmentation acts as a backbone supporting and protecting the graft until the process of healing and ligamentization of the graft is completed. The ends of the suture tape are tied on the tibial button and additionally fixed to the tibia with a knotless anchor as a backup fixation with the knee in full extension...
December 2017: Arthroscopy Techniques
https://www.readbyqxmd.com/read/29349021/arthroscopic-repair-of-medial-transtendinous-rotator-cuff-tears
#15
Brian J Kelly, Larry D Field
Rotator cuff tears are extremely common in the adult population, and medial transtendinous rotator cuff tears, although rare, have recently been reported in the literature. These tears are almost always traumatic, which is a common indication for surgical management. It is necessary to consider these tears as a distinct subset when planning for rotator cuff repair because traditional repair techniques would overtension the tendon, increasing the risk for failure of the repair. The objective of this Technical Note is to describe an arthroscopic repair technique for these tears that avoids overtensioning the rotator cuff while still using repair techniques that are familiar to the arthroscopic shoulder surgeon...
December 2017: Arthroscopy Techniques
https://www.readbyqxmd.com/read/29349020/an-arthroscopic-humeral-medializing-repair-of-the-supraspinatus
#16
Amir Ghazanfari, Daniel J H Henderson, Geoffroy Nourissat
Posterosuperior repair of the rotator cuff is one of the most frequently performed surgical procedures in the shoulder. Its aim is to fix the tendon back to the bone to restore anatomy, improve shoulder function, and prevent progression of cuff tear arthropathy and attendant muscle degeneration. Despite technical advances in this procedure, in some cases, the tendon cannot be fixed back to the footprint without excessive tension on the repair. In young patients or in patients with low-grade muscle atrophy and fatty degeneration (Goutallier grade 1 or 2), it is mandatory to attempt fixation of the tendon to restore functional anatomy and prevent further muscle degeneration...
December 2017: Arthroscopy Techniques
https://www.readbyqxmd.com/read/29349015/patellar-tendon-repair-with-ipsilateral-semitendinosus-autograft-augmentation
#17
Jarret M Woodmass, Joshua D Johnson, Isabella T Wu, Aaron J Krych, Michael J Stuart
Patellar tendon ruptures are rare but potentially devastating injuries. Acute repair after patellar tendon rupture affords the best opportunity for tension-free restoration of the extensor mechanism. Biological augmentation of primary repair is believed to decrease strain across the repair site and reduce the risk of rerupture. We present a technique for primary patellar tendon repair with bidirectional fixation using transosseous tunnels, suture anchor fixation, and ipsilateral hamstring autograft augmentation in a distal patellar pole socket...
December 2017: Arthroscopy Techniques
https://www.readbyqxmd.com/read/29349014/graft-preparation-technique-to-optimize-hamstring-graft-diameter-for-anterior-cruciate-ligament-reconstruction
#18
Brett Fritsch, Francisco Figueroa, Bertrand Semay
Hamstring autografts are frequently used for anterior cruciate ligament reconstruction. The inherent variability in graft diameter has been stated as a disadvantage in its use because the presence of smaller graft diameters has been correlated with increased risk of re-rupture. Several techniques have been described to address this concern. Modifications of the basic Graftlink technique allows for increased control over final graft diameter using a standard harvest of the semitendinosus tendon with or without the gracilis tendon, and results in a graft of adequate length and diameter in all patients with rigid cortical fixation on the femur and tibia...
December 2017: Arthroscopy Techniques
https://www.readbyqxmd.com/read/29349002/medial-patellofemoral-ligament-reconstruction-using-dual-patella-docking-technique
#19
Hassan Azimi, Oke Anakwenze
Medial patellofemoral ligament (MPFL) injuries are common in children and young adults. In patients with recurrent patellar dislocations with normal lower-extremity alignment, anatomic reconstruction of the MPFL has been shown to restore patellar stability. We describe a technique that creates an anatomic reconstruction using a dual docking technique into the patella. Our technique is simple and efficacious for reconstructing the MPFL without implant fixation in the patella, allowing a maximal bone-tendon interface for healing...
December 2017: Arthroscopy Techniques
https://www.readbyqxmd.com/read/29349000/hamstring-graft-preparation-techniques-for-anterior-cruciate-ligament-reconstruction
#20
Gustavo Vinagre, Nicholas I Kennedy, Jorge Chahla, Mark E Cinque, Zaamin B Hussain, Morten L Olesen, Robert F LaPrade
Anterior cruciate ligament reconstruction is one of the most commonly performed procedures in orthopaedics, with more than 125,000 performed in the United States per year. There are several reconstruction graft choices that can be used to reconstruct the native anterior cruciate ligament, with autograft hamstring tendons being one of the most commonly used. Preparation of a hamstring autograft varies depending on patient characteristics and physician preference. The purpose of this Technical Note is to describe in detail different variants of hamstring graft preparation techniques that are commonly used in practice...
December 2017: Arthroscopy Techniques
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