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Supraspinatus

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https://www.readbyqxmd.com/read/29146012/a-biomechanical-cadaveric-study-comparing-superior-capsule-reconstruction-using-fascia-lata-allograft-with-human-dermal-allograft-for-irreparable-rotator-cuff-tear
#1
Teruhisa Mihata, Christopher N H Bui, Masaki Akeda, Matthew A Cavagnaro, Michael Kuenzler, Alexander B Peterson, Michelle H McGarry, Yasuo Itami, Orr Limpisvasti, Masashi Neo, Thay Q Lee
BACKGROUND: Biomechanical and clinical success of the superior capsule reconstruction (SCR) using fascia lata (FL) grafts has been reported. In the United States, human dermal (HD) allograft has been used successfully for SCRs; however, the biomechanical characteristics have not been reported. METHODS: Eight cadaveric shoulders were tested in 5 conditions: (1) intact; (2) irreparable supraspinatus tear; (3) SCR using FL allograft with anterior and posterior suturing; (4) SCR using HD allograft with anterior and posterior suturing; and (5) SCR using HD allograft with posterior suturing...
December 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/29137497/optimization-of-t2-weighted-imaging-for-shoulder-magnetic-resonance-arthrography-by-synthetic-magnetic-resonance-imaging
#2
Seung Hyun Lee, Young Han Lee, Seok Hahn, Jaemoon Yang, Ho-Taek Song, Jin-Suck Suh
Background Synthetic magnetic resonance imaging (MRI) allows reformatting of various synthetic images by adjustment of scanning parameters such as repetition time (TR) and echo time (TE). Optimized MR images can be reformatted from T1, T2, and proton density (PD) values to achieve maximum tissue contrast between joint fluid and adjacent soft tissue. Purpose To demonstrate the method for optimization of TR and TE by synthetic MRI and to validate the optimized images by comparison with conventional shoulder MR arthrography (MRA) images...
January 1, 2017: Acta Radiologica
https://www.readbyqxmd.com/read/29121906/impaired-contractile-function-of-the-supraspinatus-in-the-acute-period-following-a-rotator-cuff-tear
#3
Ana P Valencia, Shama R Iyer, Espen E Spangenburg, Mohit N Gilotra, Richard M Lovering
BACKGROUND: Rotator cuff (RTC) tears are a common clinical problem resulting in adverse changes to the muscle, but there is limited information comparing histopathology to contractile function. This study assessed supraspinatus force and susceptibility to injury in the rat model of RTC tear, and compared these functional changes to histopathology of the muscle. METHODS: Unilateral RTC tears were induced in male rats via tenotomy of the supraspinatus and infraspinatus...
November 9, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/29121524/eating-quality-traits-of-shoulder-roast-and-stir-fry-cuts-outperformed-loin-and-silverside-cuts-sourced-from-entire-and-immunocastrated-male-pigs
#4
H A Channon, D N D'Souza, F R Dunshea
This study investigated the effects of ageing period (2 or 7days), endpoint temperature (70 or 75°C), cut type (loin (M. longissimus thoracis et lumborum), silverside (M. biceps femoris), blade (M. triceps brachii) and chuck tender (M. supraspinatus)), cooking method (roast and stir fry (all cuts) and steak (loin only)) on eating quality attributes of pork from entire and immunocastrated male pigs. Higher intramuscular fat levels were found in all cuts from immunocastrated males compared with entire males...
October 31, 2017: Meat Science
https://www.readbyqxmd.com/read/29103284/carcass-traits-fatty-acid-composition-gene-expression-oxidative-stability-and-quality-attributes-of-different-muscles-in-dorper-lambs-fed-nigella-sativa-seeds-rosmarinus-officinalis-leaves-and-their-combination
#5
Kifah Jumaah Odhaib, Kazeem Dauda Adeyemi, Awis Qurni Sazili
Objective: This study examined the influence of dietary supplementation of Nigella sativa seeds, Rosmarinus officinalis leaves and their combination on carcass attributes, fatty acid (FA) composition, gene expression, lipid oxidation and physicochemical properties of longissimus dorsi (LD), semitendinosus (ST) and supraspinatus (SS) muscles in Dorper lambs. Methods: Twenty-four Dorper lambs (18.68±0.6 kg, 4-5 months old) were randomly assigned to a concentrate mixture containing either, no supplement (control, T1), 1% Rosmarinus officinalis leaves (T2), 1% Nigella sativa seeds (T3), or 1% Rosmarinus officinalis leaves + 1% Nigella sativa seeds (T4) on a dry matter basis...
November 3, 2017: Asian-Australasian Journal of Animal Sciences
https://www.readbyqxmd.com/read/29102255/hourglass-like-constriction-of-the-suprascapular-nerve-a-contraindication-for-minimally-invasive-surgery
#6
Adolfo Vigasio, Ignazio Marcoccio
BACKGROUND: Suprascapular nerve (SSN) entrapment is usually ascribed to static or dynamic compression. When no cause of compression is found, SSN entrapment is defined as idiopathic. Focal hourglass-like constriction (H-LC) of the SSN that results in muscle paralysis represents an unusual condition that may be misinterpreted and erroneously diagnosed as SSN entrapment or as neuralgic amyotrophy. METHODS: With the aim of finding clinical and surgical clues that could differentiate the traditional form of idiopathic SSN entrapment from the rare H-LC, a series of 6 cases of SSN palsy caused by H-LC is presented...
October 25, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/29101774/dextrose-prolotherapy-for-chronic-shoulder-pain-a-case-report
#7
Casey Seenauth, Vance Inouye, Jeffrey O Langland
Context • Shoulder pain is one of the most common pain complaints reported by patients. Consensus is lacking on its ideal treatment, and many different treatments are available and used. Prolotherapy is an injection-based therapy that has shown significant results in treating many common musculoskeletal pain conditions, including osteoarthritis, lateral epicondylosis, and low-back pain. Objective • The study intended to evaluate the use of dextrose prolotherapy in the treatment of shoulder pain. Design • The research team performed a case study...
November 4, 2017: Alternative Therapies in Health and Medicine
https://www.readbyqxmd.com/read/29101541/rotator-cuff-muscular-integrity-after-arthroscopic-revision-of-a-bankart-repair
#8
Johannes Buckup, Frederic Welsch, Reinhard Hoffmann, Philip P Roessler, Karl F Schüttler, Thomas Stein
INTRODUCTION: Recurrent shoulder instability after arthroscopic Bankart repair is still a common complication. For primary Bankart repair studies have shown that the rotator cuff can recover completely. The ability of muscles to regenerate after arthroscopic revision Bankart repair (ARBR) has not been studied. Does the ARBR using a three-portal method allows complete muscle integrity compared with an uninjured imaging control group (ICG)? MATERIALS AND METHODS: Twenty-two (1 female, 21 males) physically active patients (mean age at follow-up 28...
November 3, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/29100763/five-year-outcomes-after-arthroscopic-repair-of-partial-thickness-supraspinatus-tears
#9
Alexander R Vap, Sandeep Mannava, J Christoph Katthagen, Marilee P Horan, Erik M Fritz, Jonas Pogorzelski, Peter J Millett
PURPOSE: To investigate clinical outcomes in patients who underwent arthroscopic repair of isolated partial-thickness rotator cuff tears (PTRCTs) of the supraspinatus tendon with a minimum follow-up period of 5 years. METHODS: All patients who had undergone arthroscopic repair of isolated PTRCTs at least 5 years earlier were included. Preoperatively and postoperatively, the American Shoulder and Elbow Surgeons, QuickDASH (short version of Disabilities of the Arm, Shoulder and Hand questionnaire), and Short Form 12 Physical Component Summary scores were collected, along with postoperative satisfaction (10-point scale) and return to activity...
October 31, 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/29099894/effects-of-platelet-rich-plasma-and-indomethacin-on-biomechanics-of-rotator-cuff-repair
#10
Molly C Meadows, David M Levy, Christopher M Ferry, Thomas R Gardner, Takeshi Teratani, Christopher S Ahmad
We conducted a study to determine if platelet-rich plasma (PRP) enhances the strength of rotator cuff repair (RCR) and if concomitant use of nonsteroidal anti-inflammatory drugs (NSAIDs) affects PRP efficacy. We also wanted to determine the optimal centrifugation protocol for making PRP from rats. This study used 48 rats, 14 in a centrifugation protocol and 34 in an operative protocol. Six syngeneic rats from the operative group were used as PRP blood donors; the other 28 operative rats underwent bilateral RCRs...
September 2017: American Journal of Orthopedics
https://www.readbyqxmd.com/read/29079910/the-effect-of-rotator-cuff-malreduction-on-tendon-tension-an-evaluation-of-a-custom-made-digital-tensiometer-clamp
#11
Marc-Frederic Pastor, Manuel Kraemer, Michael Schwarze, Christof Hurschler, Tomas Smith, Mathias Wellmann
INTRODUCTION: Rotator cuff tears are common and good-to-excellent clinical outcome is reported after subsequent repair. However, the retear rate of rotator cuff repairs has been shown to be as high as 20%. The reasons for retear seem to be multifactorial, mainly comprised by mechanical and biological aspects. Regarding mechanical causes, the role of the tendon tension and malreduction is so far unknown. First, we hypothesized that the tendon tension depends on the technique of tendon reposition and that malreduction of the tendon results in an increased tendon tension...
October 27, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/29079262/functional-and-radiographic-outcomes-after-arthroscopic-transosseous-suture-repair-of-medium-sized-rotator-cuff-tears
#12
Xiao Ning Liu, Cheol-Jung Yang, Geun Woo Lee, Sang Hyun Kim, Yong-Hyun Yoon, Kyu-Cheol Noh
PURPOSE: To evaluate the functional and anatomical outcomes after arthroscopic transosseous suture (TOS) repair of 2 to 4 cm sized rotator cuff tears and to identify preoperative factors influencing repair failure. METHODS: From May 2013 to August 2014, patients with symptomatic 2 to 4 cm full-thickness tears underwent arthroscopic TOS repair, and those who could be followed up for a minimum of 2 years were included in this retrospective study. Functional and anatomical outcomes were analyzed up to 2 years postoperatively...
October 24, 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/29075914/sonographic-assessment-of-subacromial-bursa-distension-during-arm-abduction-establishing-a-threshold-value-in-the-diagnosis-of-subacromial-impingement-syndrome
#13
Gokhan Soker, Bozkurt Gulek, Eda Soker, Omer Kaya, Ibrahim Inan, Muhammet Arslan, Kaan Esen, Derya Memis, Cengiz Yilmaz
PURPOSE: In this study, we aimed to establish a quantitative threshold value in the diagnosis of subacromial impingement syndrome by measuring the thickness of the subacromial bursa during abduction and adduction. MATERIALS AND METHODS: Forty-five patients with subacromial impingement syndrome and 54 healthy individuals underwent dynamic shoulder ultrasonography. The subacromial bursa, between the supraspinatus tendon margin and peribursal adipose tissue, was measured between the acromion and humeral head at its widest part...
October 26, 2017: Journal of Medical Ultrasonics
https://www.readbyqxmd.com/read/29062826/ultrasound-evaluation-of-the-rotator-cuff-after-osteosynthesis-of-proximal-humeral-fractures-with-locking-intramedullary-nail
#14
Mauro Emilio Conforto Gracitelli, Eduardo Angeli Malavolta, Jorge Henrique Assunção, Bruno Akio Matsumura, Kodi Edson Kojima, Arnaldo Amado Ferreira Neto
OBJECTIVE: To evaluate supraspinatus tendon integrity with ultrasound (US) in patients submitted to proximal humeral fracture (PHF) fixation with a locking intramedullary nail. METHODS: Thirty-one patients with PHF treated with curvilinear locking intramedullary nail, aged between 50 and 85 years, were assessed by US at six months postoperatively and clinically at six and 12 months postoperatively. The primary aim was supraspinatus tendon integrity, evaluated by US at six months postoperatively...
September 2017: Revista Brasileira de Ortopedia
https://www.readbyqxmd.com/read/29060198/subject-specific-shoulder-muscle-attachment-region-prediction-using-statistical-shape-models-a-validity-study
#15
Asma Salhi, Valerie Burdin, Tinashe Mutsvangwa, Sudesh Sivarasu, Sylvain Brochard, Bhushan Borotikar
Subject-specific musculoskeletal models can predict accurate joint and muscle biomechanics thereby helping clinicians and surgeons. Current modeling strategies do not incorporate accurate subject-specific muscle parameters. This study reports a statistical shape model (SSM) based method to predict subject-specific muscle attachment regions on shoulder bones and illustrates the concurrent validity of the predictions. Augmented SSMs of scapula and humerus bones were built using bone meshes and five muscle attachment (origin/insertion) regions which play important role in the shoulder motion and function...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29054030/measurement-of-strain-and-tensile-force-of-the-supraspinatus-tendon-under-conditions-that-simulates-low-angle-isometric-elevation-of-the-gleno-humeral-joint-influence-of-adduction-torque-and-joint-positioning
#16
Hiroki Miyamoto, Mitsuhiro Aoki, Egi Hidaka, Mineko Fujimiya, Eiichi Uchiyama
BACKGROUND: Recently, supraspinatus muscle exercise has been reported to treat rotator cuff disease and to recover shoulder function. However, there have been no report on the direct measurement of strain on the supraspinatus tendon during simulated isometric gleno-humeral joint elevation. METHODS: Ten fresh-frozen shoulder specimens with the rotator cuff complex left intact were used as experimental models. Isometric gleno-humeral joint elevation in a sitting position was reproduced with low angle of step-by-step elevation in the scapular plane and strain was measured on the surface layer of the supraspinatus tendon...
October 13, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/29051166/epidemiology-of-imaging-detected-tendon-abnormalities-in-athletes-participating-in-the-rio-de-janeiro-2016-summer-olympics
#17
Mohamed Jarraya, Michel D Crema, Lars Engebretsen, Oleg M Teytelboym, Daichi Hayashi, Frank W Roemer, Abdalla Y Skaf, Ali Guermazi
BACKGROUND: Tendon abnormalities are prevalent among both elite and non-elite athletes. Cross-sectional imaging modalities are used to confirm and evaluate the severity of such lesions. AIM: To describe the demographics, prevalence, anatomical location and characteristics of tendon abnormalities in athletes who participated in the Rio de Janeiro 2016 Summer Olympic Games. METHODS: We recorded all sports injuries reported by the National Olympic Committee (NOC) medical teams and the Organizing Committee medical staff during the Rio 2016 Summer Olympics...
October 19, 2017: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/29045184/predictive-factors-of-retear-in-patients-with-repaired-rotator-cuff-tear-on-shoulder-mri
#18
Yun Kyung Shin, Kyung Nam Ryu, Ji Seon Park, Wook Jin, So Young Park, Young Cheol Yoon
OBJECTIVE: This study aimed to find independent prognostic factors related to retear of the rotator cuff tendon in patients with repaired full-thickness supraspinatus tendon tear by evaluation of pre- and postoperative MR images. MATERIALS AND METHODS: Shoulder MR images were retrospectively analyzed for 83 patients who had undergone arthroscopic or open rotator cuff repair with acromioplasty for full-thickness supraspinatus tendon tear from April 2014 to March 2015...
October 18, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/29038740/reverse-fosbury-flop-tear-of-the-rotator-cuff
#19
Jérôme Tirefort, Gregory Cunningham, Alexandre Lädermann
INTRODUCTION: "Fosbury flop" tear is an avulsion of the posterosuperior rotator cuff from the bone with reversal healing on its medial bursal-side. This case report describes a unique variant of Fosbury flop tear with a lesion of the musculotendinous junction that healed, for its tendon part, on the anterior humerus and coracoid process. CASE PRESENTATION: A 62-year-old man developed a posttraumatic painful shoulder with active loss of range of motion. Magnetic resonance arthrography demonstrated a lesion of the musculotendinous junction of the supraspinatus with healing of the tendon on the above-mentioned structures (reverse Fosbury flop)...
2017: Case Reports in Orthopedics
https://www.readbyqxmd.com/read/29021101/comparison-between-the-patients-with-surgery-and-without-surgery-after-recommendation-of-surgical-repair-for-symptomatic-rotator-cuff-tear
#20
Jae Chul Yoo, Tae Kang Lim, Dong Hyok Kim, Kyoung-Hwan Koh
PURPOSE: Symptomatic full-thickness rotator cuff (RC) tears are often recommended for surgical repairs. However, some patients decide not to have surgery. The aim of this study was to see if there was any difference in preoperative variables between the two groups. METHODS: 137 consecutive patients recommended for surgery due to symptomatic full-thickness RC tear were evaluated. At mean 58.1 months after surgery-recommendation, the patients were asked whether they had surgery and their clinical outcome was assessed...
October 8, 2017: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
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