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https://www.readbyqxmd.com/read/28098497/magnetic-resonance-arthrography-results-that-indicate-surgical-treatment-for-partial-articular-sided-supraspinatus-tendon-avulsion-a-retrospective-study-in-a-tertiary-center
#1
Seok Hahn, Young Han Lee, Yong-Min Chun, Eun Hae Park, Jin-Suck Suh
Background Specific findings on magnetic resonance arthrography (MRA) that indicate the need for surgery in patients with partial articular-sided supraspinatus tendon avulsion (PASTA) are not well understood. Purpose To determine which MRA findings are characteristic of patients who undergo surgery for PASTA. Material and Methods From July 2011 to February 2014, MRA findings for patients treated for PASTA were retrospectively reviewed. The patients were divided into two groups: conservative treatment and surgical repair...
January 1, 2017: Acta Radiologica
https://www.readbyqxmd.com/read/28094420/evaluation-of-the-optimal-plate-position-for-the-fixation-of-supraglenoid-tubercle-fractures-in-warmbloods
#2
Sina Frei, Hans Geyer, Seamus Hoey, Anton E Fuerst, Andrea S Bischofberger
OBJECTIVES: To determine scapular cortex thickness, distal scapular bone density and describe the exact suprascapular nerve course to evaluate the best plate position for the fixation of supraglenoid tubercle fractures in horses. METHODS: Twelve equine cadaveric shoulders were examined with computed tomography. Computed tomography morphometry and density measurements (Hounsfield units [HU]) of the scapula were recorded. Statistical comparisons were made between the cranial and caudal aspects of the scapula...
January 17, 2017: Veterinary and Comparative Orthopaedics and Traumatology: V.C.O.T
https://www.readbyqxmd.com/read/28089497/biomechanical-comparison-of-standard-and-linked-single-row-rotator-cuff-repairs-in-a-human-cadaver-model
#3
Adam F Meisel, Heath B Henninger, F Alan Barber, Mark H Getelman
PURPOSE: The purpose of this study was to evaluate the time zero cyclic and failure loading properties of a linked single-row rotator cuff repair compared with a standard simple suture single-row repair using triple-loaded suture anchors. METHODS: Eighteen human cadaveric shoulders from 9 matched pairs were dissected, and full-thickness supraspinatus tears were created. The tendon cross-sectional area was recorded. In each pair, one side was repaired with a linked single-row construct and the other with a simple suture single-row construct, both using 2 triple-loaded suture anchors...
January 12, 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/28074776/morphological-classification-of-acromial-spur-correlation-between-rockwood-tilt-view-and-arthroscopic-finding
#4
Pinkawas Kongmalai, Adinun Apivatgaroon, Bancha Chernchujit
: Purpose and hypothesis: Acromion spur is the extrinsic factor for impingement syndrome and rotator cuff tear. The Rockwood tilt view can be used to evaluate prominence of the anterior acromion, however no study has shown the correlation of findings between the Rockwood tilt view and the arthroscopic finding. METHODS: We developed the arthroscopic classification of acromion spur as type 1 flat spur, type 2 bump spur, type 3 heel spur, type 4 keel spur, and type 5 irregular spur...
2017: SICOT-J
https://www.readbyqxmd.com/read/28071815/effect-of-glenohumeral-elevation-on-subacromial-supraspinatus-compression-risk-during-simulated-reaching
#5
Rebekah L Lawrence, Dustin M Schlangen, Katelyn A Schneider, Jonathan Schoenecker, Andrea L Senger, William C Starr, Justin L Staker, Jutta M Ellermann, Jonathan P Braman, Paula M Ludewig
Mechanical subacromial rotator cuff compression is one theoretical mechanism in the pathogenesis of rotator cuff disease. However, the relationship between shoulder kinematics and mechanical subacromial rotator cuff compression across the range of humeral elevation motion is not well understood. The purpose of this study was to investigate the effect of humeral elevation on subacromial compression risk of the supraspinatus during a simulated functional reaching task. Three-dimensional anatomical models were reconstructed from shoulder magnetic resonance images acquired from 20 subjects (10 asymptomatic, 10 symptomatic)...
January 10, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28064003/a-semi-automated-quantitative-ct-method-for-measuring-rotator-cuff-muscle-degeneration-in-shoulders-with-primary-osteoarthritis
#6
Alexandre Terrier, Julien Ston, Antoine Dewarrat, Fabio Becce, Alain Farron
BACKGROUND: Rotator cuff muscle degeneration is an important parameter to consider when planning shoulder arthroplasty. HYPOTHESIS: We hypothesized that rotator cuff muscle degeneration is correlated with scapulohumeral subluxation in patients planned for anatomical total shoulder arthroplasty (TSA). MATERIALS AND METHODS: We developed a semi-automated quantitative CT method to measure rotator cuff muscle degeneration, and retrospectively analyzed 107 preoperative shoulder CT scans of patients with primary osteoarthritis...
January 4, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28052089/evaluation-of-pressure-pain-threshold-as-a-measure-of-perceived-stress-and-high-job-strain
#7
Lisbeth Hven, Poul Frost, Jens Peter Ellekilde Bonde
OBJECTIVE: To investigate whether pressure pain threshold (PPT), determined by pressure algometry, can be used as an objective measure of perceived stress and job strain. METHODS: We used cross-sectional base line data collected during 1994 to 1995 within the Project on Research and Intervention in Monotonous work (PRIM), which included 3123 employees from a variety of Danish companies. Questionnaire data included 18 items on stress symptoms, 23 items from the Karasek scale on job strain, and information on discomfort in specified anatomical regions was also collected...
2017: PloS One
https://www.readbyqxmd.com/read/28042977/full-can-test-mechanisms-of-a-positive-test-in-patients-with-shoulder-pain
#8
Mark K Timmons, Sevgi S Yesilyaprak, Jeff Ericksen, Lori A Michener
BACKGROUND: The full can test is theorized to produce compressive loads on the supraspinatus tendon within the subacromial space. Characterizing the width of the subacromial outlet, scapular orientation, and shoulder pain during the full can test will improve the mechanistic understanding of the positive full can test. METHODS: Cross-sectional repeated measures design. Participants with subacromial pain syndrome (n=30) were compared to a matched control group (n=30) during 2 conditions: passive support, and the full can test...
December 24, 2016: Clinical Biomechanics
https://www.readbyqxmd.com/read/28036238/clinical-relevance-of-classifying-massive-rotator-cuff-tears
#9
Hyun Soo Ok, Byung Guk Kim, Won Chul Choi, Chul Gie Hong, Jee Woong Kim, Jae Hwa Kim
BACKGROUND: Studies on the results of arthroscopic repair of massive rotator cuff tears have reported widely varied prognoses. Among other factors, the sizable discrepancy can be attributable to the fact that the current definition of massive rotator cuff tears covers an extensive area of tendons. HYPOTHESIS: Functional and radiological results according to subgroups would show significant inter-subgroup differences preoperatively and postoperatively. STUDY DESIGN: Cohort study; Level of evidence, 2...
January 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28035424/clinical-outcome-and-prognostic-factors-of-revision-arthroscopic-rotator-cuff-tear-repair
#10
Maria Valencia Mora, Diana Morcillo Barrenechea, Maria Dolores Martín Ríos, Antonio M Foruria, Emilio Calvo
PURPOSE: The aim of this study was to evaluate the clinical outcome of arthroscopic rotator cuff revision surgery in a cohort of patients and to identify prognostic factors for this procedure. METHODS: Fifty-one consecutive patients undergoing revision arthroscopic rotator cuff repair were prospectively followed over a minimum period of one year. Radiologic findings and clinical data regarding primary and revision surgery were collected. Clinical evaluation was performed pre- and post-operatively by means of Constant Score and Simple Shoulder Test...
December 29, 2016: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28005290/collagen-v-expression-is-crucial-in-regional-development-of-the-supraspinatus-tendon
#11
Brianne K Connizzo, Sheila M Adams, Thomas H Adams, David E Birk, Louis J Soslowsky
Manipulations in cell culture and mouse models have demonstrated that reduction of collagen V results in altered fibril structure and matrix assembly. A tissue-dependent role for collagen V in determining mechanical function was recently established, but its role in determining regional properties has not been addressed. The objective of this study was to define the role(s) of collagen V expression in establishing the site-specific properties of the supraspinatus tendon. The insertion and midsubstance of tendons from wild type, heterozygous and tendon/ligament-specific null mice were assessed for crimp morphology, fibril morphology, cell morphology, as well as total collagen and pyridinoline cross-link (PYD) content...
December 2016: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28005110/biomechanics-of-polyhydroxyalkanoate-mesh-augmented-single-row-rotator-cuff-repairs
#12
Robert Z Tashjian, Christopher W Kolz, Thomas Suter, Heath B Henninger
Polyhydroxyalkanoate (PHA) mesh is a bioresorbable scaffold used to reinforce the suture-tendon interface in rotator cuff repairs (RCRs). We conducted a study of cyclic and ultimate failure properties of PHA mesh-augmented single-row RCRs and nonaugmented RCRs. Eight pairs of fresh-frozen cadaver humeri (6 male, 2 female) were tested. Mean (SD) age was 61 (9) years. The supraspinatus tendon was resected and reattached in a single-row configuration using 2 triple-loaded suture anchors and 6 simple stitches. The opposite humerus underwent RCR augmented with 2 strips of 13-mm × 23-mm PHA mesh...
November 2016: American Journal of Orthopedics
https://www.readbyqxmd.com/read/28003609/the-development-of-vibration-system-for-applying-magnetic-resonance-elastography-mre-to-the-supraspinatus-muscle
#13
Daiki Ito, Tomokazu Numano, Kazuyuki Mizuhara, Kouichi Takamoto, Takaaki Onishi, Hisao Nishijo
Palpation is a standard clinical tool to diagnose abnormal stiffness changes in soft tissues. However, it is difficult to palpate the supraspinatus muscle because it locates under the trapezius muscle. The magnetic resonance elastography (MRE) uses harmonic mechanical excitation to quantitatively measure the stiffness (shear modulus) of both the superficial and deep tissues. The purpose of this study was to build a vibration system for applying the MRE to the supraspinatus muscle. In this study, a power amplifier and a pneumatic pressure generator were used to supply vibrations to a vibration pad...
2016: Nihon Hoshasen Gijutsu Gakkai Zasshi
https://www.readbyqxmd.com/read/28002923/tendinopathic-supraspinatus-tenocytes-may-have-a-neuroendocrine-like-function-secreting-cgrp-sp-and-vegf-a-pilot-immunohistochemistry-study
#14
R Sahemey, P Malliaras, J S Lewis, G J Michael, P Shortland, D Morrissey, N Maffulli
We wanted to observe and compare the appearance of neurovascular tissue from tendon ex vivo, in patients with and without painful rotator cuff tendinopathy. Supraspinatus tendons were biopsied from 5 participants with painful tendinopathy and normal tendon from a young male. Slides were stained with haematoxylin and eosin and toluidine blue for histological assessment. Immunohistochemical markers for general nerves (protein gene-product 9.5 and synaptophysin), sensory nerves (calcitonin gene-related peptide; substance-P) and vascularisation (vascular endothelial growth factor) were used...
October 2016: Journal of Biological Regulators and Homeostatic Agents
https://www.readbyqxmd.com/read/28001327/supraspinatus-tendon-overuse-results-in-degenerative-changes-to-tendon-insertion-region-and-adjacent-humeral-cartilage-in-a-rat-model
#15
Akia N Parks, Jennifer McFaline-Figueroa, Anne Coogan, Emma Poe-Yamagata, Robert E Guldberg, Manu O Platt, Johnna S Temenoff
The etiology of rotator cuff tendon overuse injuries is still not well understood. Furthermore, how this overuse injury impacts other components of the glenohumeral joint, including nearby articular cartilage, is also unclear. Therefore, this study sought to better understand the time course of tendon protease activity in a rat model of supraspinatus overuse, as well as determine effects of 10 weeks of overuse on humeral head articular cartilage. For these studies, multiplex gelatin zymography was used to characterize protease activity profiles in tendon and cartilage, while histological scoring/mechanical testing and micro-computed tomography (μCT) imaging were used to quantify structural damage in the supraspinatus tendon insertion and humeral articular cartilage, respectively...
December 21, 2016: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/27966031/bilateral-bony-fusion-around-the-supraspinatus-muscle-inducing-muscle-hypoplasia-and-shoulder-pain
#16
YeNa Son, Kyung Nam Ryu, Wook Jin, Ji Seon Park, So Young Park
We describe the case of a 30-year-old man who developed chronic bilateral shoulder pain that relapsed and remitted over the course of 1 year. The patient was diagnosed with congenital shoulder fusion anomalies. The right shoulder showed anomalous accessory articulation between the distal third of the clavicle and the acromion along with normal articulation of the shoulder on CT. At the left shoulder, bony fusions were present between the distal portion of the clavicle, the acromion, and the coracoid process, and between the coracoid process, upper portion of the glenoid, and upper body of the scapula, which formed a bony canal and was responsible for hypoplasia of the supraspinatus muscle on CT and MRI...
December 14, 2016: Skeletal Radiology
https://www.readbyqxmd.com/read/27964874/differences-in-fatty-degeneration-of-rotator-cuff-muscles-at-different-sites-as-quantified-by-t2-mapping
#17
Yuki Iijima, Keisuke Matsuki, Shota Hoshika, Yusuke Ueda, Kazutomo Onishi, Morihito Tokai, Norimasa Takahashi, Hiroyuki Sugaya, Kazuhiko Dougo, Atsuya Watanabe
BACKGROUND: Fatty degeneration of the cuff muscles is usually evaluated at the Y-view in oblique sagittal images. It was recently proposed that muscle shift after repair may influence the fatty degeneration values, and the evaluation of the muscles at a more medial site was recommended. However, the differences in muscle quality in accord with measurement sites have been unclear. Here we evaluated differences in fatty degeneration of the rotator cuff muscles measured quantitatively at different sites, using T2 mapping...
December 10, 2016: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
https://www.readbyqxmd.com/read/27956821/shoulder-muscle-activity-during-the-modified-dynamic-relocation-test-and-side-lying-shoulder-external-rotation-a-cross-sectional-study-on-asymptomatic-individuals
#18
Daniel Cury Ribeiro, Jonathan Shemmell, Carrie Falling, Gisela Sole
OBJECTIVES: (1) to compare activity levels between monitored muscles during the dynamic relocation test (DRT); (2) to assess changes in muscle activation variability over 10 trials; (3) to assess within-muscle difference activity levels between the DRT and the unloaded side-lying shoulder external rotation exercise. METHODS: This is a cross-sectional, laboratory-based, repeated measures study. Thirty asymptomatic individuals performed the DRT and unloaded side-lying external rotation...
December 2016: Journal of Manual & Manipulative Therapy
https://www.readbyqxmd.com/read/27941908/association-of-bicipital-peritendinous-effusion-with-subacromial-impingement-a-dynamic-ultrasonographic-study-of-337-shoulders
#19
Ke-Vin Chang, Wei-Ting Wu, Levent Özçakar
Bicipital peritendinous effusion (BPE) is the most common biceps tendon abnormality and can be related to various shoulder ultrasonographic findings. Since the association of BPE with subacromial impingement is unclear, our study aimed to explore its association with the dynamic subacromial impingement test during ultrasound (US) imaging. We included 337 shoulders referred for US examinations and quantified the amount of BPE. Effusion more than 1 mm in thickness was considered a positive finding. A comparison of three grades of subacromial impingement, adjusted by patient demographics, static sonographic shoulder pathology, and physical findings, by using multivariate regression models revealed that the odds ratio of subacromial impingement (with 95% confidence intervals) in the presence of BPE was 6...
December 12, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27936246/diagnostic-accuracy-of-clinical-examination-and-imaging-findings-for-identifying-subacromial-pain
#20
Angela Cadogan, Peter J McNair, Mark Laslett, Wayne A Hing
BACKGROUND: The diagnosis of subacromial pathology is limited by the poor accuracy of clinical tests for specific pathologies. The aim of this study was to estimate the diagnostic accuracy of clinical examination and imaging features for identifying subacromial pain (SAP) defined by a positive response to diagnostic injection, and to evaluate the influence of imaging findings on the clinical diagnosis of SAP. METHODS AND FINDINGS: In a prospective, diagnostic accuracy design, 208 consecutive patients presenting to their primary healthcare practitioner for the first time with a new episode of shoulder pain were recruited...
2016: PloS One
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