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Takeshi Kataoka, Takeshi Kokubu, Tomoyuki Muto, Yutaka Mifune, Atsuyuki Inui, Ryosuke Sakata, Hanako Nishimoto, Yoshifumi Harada, Fumiaki Takase, Yasuhiro Ueda, Takashi Kurosawa, Kohei Yamaura, Ryosuke Kuroda
BACKGROUND: Fascia lata augmentation of massive rotator cuff tears has shown good clinical results. However, its biological effect during the early healing process is not clearly understood. The purpose of the study was to evaluate the biological efficacy of fascia lata augmentation during the early healing process of rotator cuff tears using a rabbit rotator cuff defect model. METHODS: The infraspinatus tendon was resected from the greater tuberosity of a rabbit to create a rotator cuff tear...
August 13, 2018: Journal of Orthopaedic Surgery and Research
Paul J Favorito, David B Spenciner, Timothy R Muench, Jolee Bartrom, Richard K Ryu
BACKGROUND: The ideal rotator cuff repair achieves high initial fixation strength and secure tendon-to-bone apposition until biological healing occurs. A suture that reacts to the local stress environment by minimizing suture laxity across the repair could theoretically maintain soft-tissue apposition to bone and therefore improve healing. METHODS: By use of an in vivo ovine shoulder model, the infraspinatus tendon was transected and then repaired with either a laxity-minimizing suture or a traditional high tensile suture...
August 3, 2018: Journal of Shoulder and Elbow Surgery
Guo-Ming Liu, Juan Pan, Yi Zhang, Liang-Ju Ning, Jing-Cong Luo, Fu-Guo Huang, Ting-Wu Qin
PURPOSE: The purpose of this study was to evaluate the efficacy of an extracellular matrix scaffold with multilayer decellularized tendon slices (MDTSs) for reconstructing large rotator cuff tears in a rabbit model. METHODS: Large defects in the infraspinatus tendons were created bilaterally in 36 rabbits. The graft group underwent bridging repair of the defects with the MDTSs grafts from Achilles tendons of adult beagle dogs, and the control group underwent repair with the autologous excised tendon...
August 2, 2018: Arthroscopy: the Journal of Arthroscopic & related Surgery
Maxwell C Park, Yasuo Itami, Charles C Lin, Adam Kantor, Michelle H McGarry, Chong J Park, Thay Q Lee
PURPOSE: To assess an anterior cable reconstruction (ACR) using autologous proximal biceps tendon for large to massive rotator cuff tears. METHODS: Nine cadaveric shoulders (mean age, 58 years) were tested with a custom testing system. Range of motion, superior translation of the humeral head, and subacromial contact pressure were measured at 0°, 30°, 60°, and 90° of external rotation (ER) with 0°, 20°, and 40° of glenohumeral abduction. Five conditions were tested: intact, stage II tear (supraspinatus), stage II tear + ACR, stage III tear (supraspinatus + anterior half of infraspinatus), and stage III tear + ACR...
August 2, 2018: Arthroscopy: the Journal of Arthroscopic & related Surgery
Martin Flück, Paola Valdivieso, Severin Ruoss, Brigitte von Rechenberg, Mario C Benn, Dominik C Meyer, Karl Wieser, Christian Gerber
INTRODUCTION: We evaluated the contribution of denervation-related molecular processes to rotator cuff muscle degeneration after tendon release. METHODS: We assessed the levels of myogenic (myogenin and myogenic differentiation factor [myoD]) and pro-adipogenic (peroxisome proliferator-activated receptor gamma) transcription factors; the denervation-associated proteins tenascin-C, laminin-2, and calcium/calmodulin dependent kinase II (CaMKII); and cellular alterations in sheep after infraspinatus tenotomy (TEN), suprascapular neurectomy (NEU), or both (TEN-NEU)...
August 2, 2018: Muscle & Nerve
Joan Miquel, F Santana, E Palau, M Vinagre, K Langohr, A Casals, C Torrens
PURPOSE: We aimed to biomechanically evaluate the effect of the supraspinatus tendon on tuberosity stability using two different reverse shoulder arthroplasty (RSA) models for complex proximal humeral fractures (PHFs). METHODS: Four-part proximal humeral fractures were simulated in 20 cadaveric shoulders. Two different RSA designs were implemented: a glenosphere-medialized model and a glenosphere-lateralized model. Tuberosities were reconstructed, and displacement of bony fragments was measured (mm) by placing three sensors: in the humeral diaphysis (D), in the greater tuberosity (GT), and in the lesser tuberosity (LT)...
July 31, 2018: Archives of Orthopaedic and Trauma Surgery
C Steen-Hansen, C Rothe, K H W Lange, L H Lundstrøm
We aimed to examine to what extent a lateral infraclavicular brachial plexus block affected the axillary and the suprascapular nerve. We included patients undergoing hand surgery anaesthetised with a lateral infraclavicular brachial plexus block. Our primary outcome was the relative change in surface electromyography during maximum voluntary isometric contraction of the medial deltoid muscle (axillary nerve) and the infraspinatus muscle (suprascapular nerve) from baseline to 30 min after the block procedure...
July 25, 2018: Anaesthesia
Greesh Kumar Singh, Sanjay Srivastava, Mukesh Kumar, Shellyka Ratnakar
BACKGROUND: Masonry workers engaged in occupational work-activities have high risk of shoulder injury that often develops to functional loss and disability. Rehabilitative exercises (REs) have potential for slowing this development. OBJECTIVE: The objective is to study the effects of three selected REs on integrated electromyography activations of the external rotator muscles and trapezius muscles of masonry workers. METHODS: Ten subjects, masonry workers having shoulder pain, have volunteered for this study...
2018: Work: a Journal of Prevention, Assessment, and Rehabilitation
Rami El-Shaar, Sandeep Soin, Gregg Nicandri, Michael Maloney, Ilya Voloshin
Background: Several procedures have been proposed to address irreparable rotator cuff (RC) tears with pseudoparalysis. One recently proposed procedure is superior capsular reconstruction (SCR) using a tensor fasciae latae (TFL) autograft. Hypothesis: SCR with a locally available long head of the biceps tendon (LHB) autograft is biomechanically equivalent to SCR using TFL autograft for preventing superior humeral migration and the development of RC arthropathy in patients with irreparable RC tears...
July 2018: Orthopaedic Journal of Sports Medicine
A M Schwarz, G M Hohenberger, S Euler, A H Weiglein, R Riedl, S Kuchling, R Krassnig, M Plecko
BACKGROUND: The purpose of the study was to evaluate the relationship of implant-related injuries to the adjacent anatomical structures in a newer generation straight proximal humeral nail (PHN) regarding different entry points. The proximity of the proximal lateral locking-screws of the MultiLoc proximal humeral nail (ML PHN) may cause iatrogenic tendon injuries to the lateral edge of the bicipital humeral groove (BG) as reference point for the tendon of the long head of biceps brachii (LBT) as well as the lateral insertion of the infraspinatus tendon (IST)...
July 9, 2018: Injury
Mukesh Kumar, Sanjay Srivastava, V Soami Das
BACKGROUND: Overhead work-activities and repetitive use of arm in occupational tasks are known risk factors to cause shoulder injury that often develops to functional disability. Rehabilitation exercises (REs) are capable of slowing this development. OBJECTIVE: The main objective of the present work is to experiment with common REs and to identify those which produce significant integrated electromyography (iEMG) activation of selected shoulder muscles namely, posterior deltoid, infraspinatus, teres minor, upper trapezius, middle trapezius and lower trapezius...
July 6, 2018: Journal of Back and Musculoskeletal Rehabilitation
Michael R Walsh, Bradley J Nelson, Jonathan P Braman, Bret Yonke, Michael Obermeier, Avais Raja, Megan Reams
BACKGROUND: Application of autologous platelet-rich plasma in fibrin matrix (PRPFM) improves tendon healing in patients undergoing arthroscopic rotator cuff repair. We performed a prospective, randomized, single-blinded study of 76 patients, with an α level of 5% and power of 80%. MATERIALS AND METHODS: Seventy-six patients were divided into 2 randomized groups. The treatment group underwent arthroscopic rotator cuff repair with PRPFM. The control group did not receive the PRPFM treatment...
July 9, 2018: Journal of Shoulder and Elbow Surgery
Dick Ameln, Edward Chadwick, Dimitra Blana, Alessio Murgia
OBJECTIVE: The goal of the current study was to determine whether and how much the stabilizing role of the shoulder muscles changes as a function of humeral elevation and the plane of elevation. METHODS: A musculoskeletal model, comprising a personalized scapulohumeral rhythm, was used to calculate the ratio of shear over compressive force (stability ratio) of three rotator cuff muscles (supraspinatus, infraspinatus, subscapularis) and three superficial shoulder muscles (middle deltoid, clavicular part of pectoralis major, latissimus dorsi) during abduction, flexion and reaching movements...
June 25, 2018: IEEE Transactions on Bio-medical Engineering
Michał Tomasz Podgórski, Łukasz Olewnik, Piotr Grzelak, Michał Polguj, Mirosław Topol
The rotator cable is a semicircular thickening of the glenohumeral joint capsule. It travels between tubercles of the humerus and interweaves with the supra- and infraspinatus muscle tendons. The rotator cable anchors these tendons to the tubercles, playing the role of a suspension bridge. However, little is known about the modifications of this cable that result from pathologies to the rotator cuff tendons. Thus, we aim to compare the morphology of the normal rotator cable with cables in specimens with rotator cuff injuries...
July 10, 2018: Anatomical Science International
Joo Y Sunwoo, Patrick H Lam, George A C Murrell
Background: Interpositional synthetic patch repairs are a novel method of treating massive irreparable rotator cuff tears. However, surgeons experience difficulty in the arthroscopic insertion of these patches. Questions/Purposes: We compared two methods of arthroscopic interpositional synthetic patch repair: the newly devised slide-and-grip technique, using pre-loaded sliding knots and no arthroscopic knots, and the weave technique, using less arthroscopic knot tying than the earlier mattress technique...
July 2018: HSS Journal: the Musculoskeletal Journal of Hospital for Special Surgery
Fu-Hui Dong
The miminally-invasive techniques of traditional Chinese medicine(TCM) uses different types of acupuncture needles to treat diseased locations with special techniques. These techniques include different methods of insertion and closed incision (press cutting, sliding cutting, scrape cutting, etc.). This needling technique is based on the traditional Chinese medicine theories of Pi Bu (cutaneous), Jing Jin (sinew), Jing Luo (meridian), Wu Ti (five body structure components) and Zang Fu (organ system). Commonly used needles include: needle Dao , needle with edge, Pi needle, Shui needle, Ren needle, Gou needle, Chang Yuan needle, Bo needle and so on...
June 25, 2018: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
Claudia Brogna, Lara Cristiano, Tommaso Tartaglione, Tommaso Verdolotti, Lavinia Fanelli, Luana Ficociello, Giorgio Tasca, Roberta Battini, Giorgia Coratti, Nicola Forcina, Roberto De Santis, Giulia Norcia, Sara Carnicella, Cesare Colosimo, Pierre Carlier, Marika Pane, Eugenio Mercuri
The aim of the study was to evaluate the spectrum of upper limb functional activities and imaging finding in a cohort of patients affected by Duchenne muscular dystrophy. Thirty-one patients of age between 5 and 29 years were included in the study (17 ambulant and 14 non-ambulant). They were all assessed using the Performance of Upper Limb (PUL) test and muscle MRI of shoulder, arm and forearm in order to establish if the functional scores obtained at shoulder, mid and distal level related to specific patterns of involvement in each upper limb segment on muscle MRI...
2018: PloS One
Neil A Evans, Emily Dressler, Tim Uhl
The primary purpose was to determine if there is a difference between the median frequency slopes of 5 posterior shoulder muscles during the initial portion of the Posterior Shoulder Endurance Test (PSET) at the 90° and 135° shoulder abduction positions. Fifty-five healthy volunteers (31 females) participated. The median frequency of the posterior deltoid (PD), upper trapezius (UT), middle trapezius (MT), lower trapezius (LT), and infraspinatus (INF) was measured during the PSET at 90° and 135° of shoulder abduction...
August 2018: Journal of Electromyography and Kinesiology
Sean Robinson, Henry Krigbaum, Jon Kramer, Connor Purviance, Robin Parrish, Joseph Donahue
Introduction: There are numerous configurations of double row fixation for rotator cuff tears however, there remains to be a consensus on the best method. In this study, we evaluated three different double-row configurations, including a new method. Our primary question is whether the new anchor and technique compares in biomechanical strength to standard double row techniques. Methods: Eighteen prepared fresh frozen bovine infraspinatus tendons were randomized to one of three groups including the New Double Row Equivalent, Arthrex Speedbridge and a transosseous equivalent using standard Stabilynx anchors...
June 2018: Journal of Orthopaedics
Elisabeth A Lemmon, Ryan C Locke, Adrianna K Szostek, Elahe Ganji, Megan L Killian
PURPOSE: Identify the healing outcomes following a partial-width, full-thickness injury to the rotator cuff tendon-bone attachment and establish if the adult attachment can regenerate the morphology of the healthy attachment. HYPOTHESIS: We hypothesized that a partial-width injury to the attachment would heal via fibrosis and bone remodeling, resulting in increased cellularity and extra-cellular matrix deposition, reduced bone volume (BV), osteoclast presence, and decreased collagen organization compared to shams...
July 2, 2018: Connective Tissue Research
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