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Y Lopiz, C Arvinius, C García-Fernández, M C Rodriguez-Bobada, P González-López, A Civantos, F Marco
AIM: Rotator cuff repairs have shown a high level of re-ruptures. It is hypothesised that the use of rhBMP-2 in a carrier could improve the biomechanical and histological properties of the repair. MATERIAL AND METHODS: Controlled experimental study conducted on 40 rats with section and repair of the supraspinatus tendon and randomisation to one of five groups: Group 1 (control) only suture; Group 2 (double control), suture and alginate-chitin carrier; Group 3 (alginate-control), the rhBMP-2 was added to the alginate; Group 4 (chitin-control) application of the rhBMP-2 to the chitin, and Group 5 (double sample): The two components of the carrier (alginate and chitin) have rhBMP-2...
October 20, 2016: Revista Española de Cirugía Ortopédica y Traumatología
Mehmet Cetinkaya, Ali Yusuf Öner, Muhammet Baybars Ataoglu, Mustafa Ozer, Tacettin Ayanoglu, Ulunay Kanatli
BACKGROUND: We aimed to evaluate cysts in the lesser tuberosity of humeral head seen on magnetic resonance imaging (MRI) and their relationship with subcoracoid impingement and subscapularis tears evident on arthroscopic surgery videos. Our hypothesis was that the cysts would be more frequent with subscapularis tears and in the case of subcoracoid impingement. METHODS: Patients who underwent shoulder arthroscopy between January 2010 and January 2016 were retrieved to evaluate subscapularis tears on surgery videos and lesser tuberosity cysts (LTC), coracohumeral distances (CHD) on both sagittal oblique and transverse sections of MRI retrospectively...
October 18, 2016: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
Seung-Hyun Yoon, Doo-Hyung Lee, Myung-Chul Jung, Young Uk Park, Seong-Yeon Lim
OBJECTIVE: The aim of this study was to evaluate the activity of rotator cuff (RC) muscles during activities of daily living. DESIGN: Motion analysis was conducted with 14 volunteers. Activation of RC (subscapularis, supraspinatus, and infraspinatus) was assessed using electromyography (EMG). Walking was performed with or without a shoulder immobilizer. Eating was conducted with or without the support of the elbow with the contralateral hand. Washing the hair was simulated while standing or leaning forward; washing the body was simulated while standing or holding the elbow; and washing the face was simulated using both hands while leaning forward...
November 2016: American Journal of Physical Medicine & Rehabilitation
Mona Alilet, Julien Behr, Jean-Philippe Nueffer, Benoit Barbier-Brion, Sébastien Aubry
: The subscapularis (SSC) muscle is the most powerful of the rotator cuff muscles, and plays an important role in shoulder motion and stabilization. SSC tendon tear is quite uncommon, compared to the supraspinatus (SSP) tendon, and, most of the time, part of a large rupture of the rotator cuff. Various complementary imaging techniques can be used to obtain an accurate diagnosis of SSC tendon lesions, as well as their extension and muscular impact. Pre-operative diagnosis by imaging is a key issue, since a lesion of the SSC tendon impacts on treatment, surgical approach, and post-operative functional prognosis of rotator cuff injuries...
October 17, 2016: Insights Into Imaging
Birgit Castelein, Ann Cools, Thierry Parlevliet, Barbara Cagnie
BACKGROUND: Altered recruitment of rotator cuff and scapulothoracic muscles has been identified in patients with subacromial impingement syndrome. To date, however, the cause-consequence relationship between pain and altered muscle recruitment has not been fully unraveled. METHODS: The effect of experimental shoulder pain induced by injection of hypertonic saline in the supraspinatus on the activity of the supraspinatus, infraspinatus, subscapularis, trapezius, and serratus anterior activity was investigated during the performance of an elevation task by use of muscle functional magnetic resonance imaging in 25 healthy individuals...
October 14, 2016: Journal of Shoulder and Elbow Surgery
Jennica J Tucker, Joshua A Gordon, Robert C Zanes, Andrey Zuskov, John D Vinciguerra, Roy D Bloebaum, Louis J Soslowsky
BACKGROUND: Current techniques in rotator cuff repair often lack structural integrity. P(2) porous titanium-coated constructs (DJO Surgical, Austin, TX, USA) promote osseointegration and soft tissue ingrowth. This study examined the ability of this material to improve the structural integrity of supraspinatus tendon repair in a rat model. We hypothesized that P(2) implants placed at the tendon-to-bone interface would improve mechanical and histologic measures of supraspinatus healing...
October 14, 2016: Journal of Shoulder and Elbow Surgery
Brady K Huang, Eric Y Chang
OBJECTIVE: To describe infraspinatus tendon injuries with associated intramuscular edema in light of more recently elucidated anatomical knowledge. MATERIAL AND METHODS: A retrospective review was performed to identify MRI cases with infraspinatus tendon injury accompanied by muscle edema. MR images were reviewed to evaluate the location of the injury, to assess the degree of tendon retraction, and to assess for muscular changes. Clinical and surgical data were reviewed when available...
October 14, 2016: Skeletal Radiology
Elizabeth B Gausden, Moira M McCarthy, Andreas Kontaxis, Keith T Corpus, Lawrence V Gulotta, Anne M Kelly
BACKGROUND: The purpose of this study was to determine the relative amount of load that is transmitted through the superior portion of the subscapularis during activities of daily living as compared with the load that is transmitted through the middle and inferior portions in a normal shoulder and in a shoulder with a supraspinatus tear. METHODS: By use of the Newcastle shoulder model, the subscapularis was modeled with 3 lines of action encircling the humeral head...
October 5, 2016: Journal of Shoulder and Elbow Surgery
Nicholas A Early, John J Elias, Steven B Lippitt, Danielle E Filipkowski, Robert A Pedowitz, William J Ciccone
BACKGROUND: This in vitro study evaluated the biomechanical benefit of adding spanning sutures to single-row rotator cuff repair. METHODS: Mechanical testing was performed to evaluate 9 pairs of cadaveric shoulders with complete rotator cuff repairs, with a single-row technique used on one side and the suture spanning technique on the other. The spanning technique included sutures from 2 lateral anchors securing tendon near the musculotendinous junction, spanning the same anchor placement from single-row repair...
October 5, 2016: Journal of Shoulder and Elbow Surgery
Nerissa Naidoo, Lelika Lazarus, Kapil Sewsaran Satyapal
Enthesopathy is considered to be an osseous phenomenon, either disease-specific or bone-site specific, which occurs at the enthesis of bone. Upon routine cadaveric dissection of the glenohumeral region in two Caucasian females, enthesopathy of the right proximal humerus was observed unilaterally in both cases. Case 1 exhibited an inconsistent pattern of bony protuberances and crests dispersed across the lesser and greater tuberosities of the right humeral head. Varying degrees of ossification of the distal subscapularis muscle was also observed...
October 7, 2016: Folia Morphologica (Warsz)
Cynthia A Kahlenberg, David M Dare, Joshua S Dines
Kukkonen et al.'s "Treatment of Nontraumatic Rotator Cuff Tears: A Randomized Controlled Trial with Two Years of Clinical and Imaging Follow-up" compared the efficacy of physical therapy, acromioplasty, and rotator cuff repair for the treatment of degenerative supraspinatus tendon tears in patients aged over 55. This review examines the authors' findings and their implications on clinical practice. Kukkonen et al. reported no significant difference in clinical outcome among patients treated operatively versus non-operatively for degenerative rotator cuff tears...
October 2016: HSS Journal: the Musculoskeletal Journal of Hospital for Special Surgery
Maxwell C Park
Is a biomechanical cadaveric study to assess the effect of rotator cuff tear size and repair technique on supraspinatus muscle stiffness clinically relevant? A study in this issue compared double-row and knotless transosseous-equivalent repairs, but notably, muscle loading was not simulated. Results showed that the knotless transosseous-equivalent repair for larger tears demonstrated a more uniform stiffness distribution across the supraspinatus muscle compared with the double-row repair. However, given the inherently asymmetrical functional anatomy and morphology of the supraspinatus tendon-muscle unit, when muscle tone exists, the effect of the repair technique on muscle stiffness in vivo may not be determined based on the findings of this study...
October 2016: Arthroscopy: the Journal of Arthroscopic & related Surgery
Hufei Zhang, Xinhe Liu, Hongye Jiang, Zimeng Liu, Xu-Yu Zhang, Hong-Zhe Xie
OBJECTIVES: Postlaparoscopic shoulder pain (PLSP) remains a common problem after laparoscopies. The aim of this study was to investigate the correlation between pressure pain threshold (PPT) of different muscles and PLSP after gynecologic laparoscopy, and to explore the effect of parecoxib, a cyclooxygenase-2 inhibitor, on the changes of PPT. MATERIALS AND METHODS: The patients were randomly allocated into two groups; group P and group C. In group P, parecoxib 40 mg was intravenously infused at 30 minutes before surgery and 8 and 20 hours after surgery...
2016: Journal of Pain Research
U Butt, M S Rashid, D Temperley, S Crank, A Birch, A J Freemont, I A Trail
AIMS: The aim of this study was to analyse human muscle tissue before and after rotator cuff repair to look for evidence of regeneration, and to characterise the changes seen in the type of muscle fibre. PATIENTS AND METHODS: Patients were assessed pre-operatively and one year post-operatively using the Oxford Shoulder Score (OSS) and MRI. The cross-sectional area and distribution of the type of muscle fibre were assessed on biopsies, which were taken at surgery and one year post-operatively...
October 2016: Bone & Joint Journal
O Le Reun, J Lebhar, F Mateos, J L Voisin, H Thomazeau, M Ropars
INTRODUCTION: Many clinical anatomy studies have looked into how variations in the acromion, coracoacromial ligament (CAL) and subacromial space are associated with rotator cuff injuries. However, no study up to now had defined anatomically the fibro-osseous canal that confines the supraspinatus muscle in the subcoracoacromial space. Through an anatomical study of the scapula, we defined the bone-related parameters of this canal and its anatomical variations. MATERIALS AND METHODS: This study on dry bones involved 71 scapulas...
September 26, 2016: Orthopaedics & Traumatology, Surgery & Research: OTSR
Giorgio Tamborrini, Christian Marx, Raphael Micheroli
BACKGROUND: Three-dimensional (3D) ultrasound of the shoulder is characterized by a comparable accuracy to two-dimensional (2D) ultrasound. No studies investigating 2D versus 3D inter-rater reliability in the detection of supraspinatus tendon tears taking into account the level of experience of the raters have been carried out so far. OBJECTIVES: The aim of this study was to determine the inter-rater reliability in the analysis of 3D ultrasound image sets of the supraspinatus tendon between sonographer with different levels of experience...
September 2016: Journal of Ultrasonography
Deanna Gigliotti, Jeff R S Leiter, Peter B MacDonald, Jason Peeler, Judy E Anderson
BACKGROUND: Rotator-cuff injury (RCI) is common and painful; even after surgery, joint stability and function may not recover. Relative contributions to atrophy from disuse, fibrosis, denervation, and satellite-cell responsiveness to activating stimuli are not known. METHODS AND FINDINGS: Potential contributions of denervation and disrupted satellite cell responses to growth signals were examined in supraspinatus (SS) and control (ipsilateral deltoid) muscles biopsied from participants with RCI (N = 27)...
2016: PloS One
Sherman O Canapp, Debra A Canapp, Victor Ibrahim, Brittany Jean Carr, Catherine Cox, Jennifer G Barrett
OBJECTIVE: To report clinical findings and outcomes for 55 dogs with supraspinatus tendinopathy (ST) treated with adipose-derived progenitor cells and platelet-rich plasma (ADPC-PRP) therapy. METHODS: Medical records of client-owned dogs diagnosed with ST that were treated with ADPC-PRP combination therapy were reviewed from 2006 to 2013. Data collected included signalment, medical history, limb involvement, prior treatments, physical and orthopedic examination, objective temporospatial gait analysis findings, diagnostic imaging results (radiography, magnetic resonance imaging, musculoskeletal ultrasonography), arthroscopy findings, and outcome...
2016: Frontiers in Veterinary Science
Nerissa Naidoo, Lelika Lazarus, Shameem Ahmed Osman, Kapil Sewsaran Satyapal
The "critical zone", a region of speculated vascularity, is situated approximately 10mm proximal to the insertion of the supraspinatus tendon. Despite its obvious role as an anatomical landmark demarcator, its patho-anatomic nature has been identified as the source of rotator cuff pathology. Although many studies have attempted to evaluate the vascularity of this region, the architecture regarding the exact length, width and shape of the critical zone, remains unreported. This study aimed to determine the shape and morphometry of the "critical zone" arthroscopically...
September 26, 2016: Folia Morphologica (Warsz)
Dominique M Rouleau, G Yves Laflamme, Jennifer Mutch
BACKGROUND: This is a retrospective prognostic study on soft tissue injury following isolated greater tuberosity (GT) fractures of the proximal humerus with respect to the relationship between rotator cuff tears and GT displacement. METHODS: Forty-three patients with isolated GT fractures were recruited and evaluated with a standardized interview and physical examination, quality of life and shoulder function questionnaires (Western Ontario Rotator Cuff Index, SF-12 Version 2, Constant, Quick-Disabilities of the Arm, Shoulder and Hand, Visual Analogue Scale), standard shoulder radiographs and an ultrasound...
October 2016: Shoulder & Elbow
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