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Supraspinatus

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https://www.readbyqxmd.com/read/28330816/the-prospective-evaluation-of-changes-in-fatty-infiltration-and-shoulder-strength-in-nonsurgically-treated-rotator-cuff-tears
#1
Yoshihiro Nakamura, Shin Yokoya, Yohei Harada, Katsunori Shiraishi, Nobuo Adachi, Mitsuo Ochi
BACKGROUND: The purpose of this study was to evaluate the relationship of fatty infiltration in rotator cuff muscles and shoulder strength in rotator cuff tears and these changes during nonsurgical treatment. METHODS: Fifty-three shoulders from 47 patients (mean age: 69.9 years) diagnosed with rotator cuff tears by magnetic resonance imaging (MRI) were treated nonsurgically. The degrees of fatty infiltration in supraspinatus (SSP) and infraspinatus (ISP) muscles were graded by the modified Goutallier classification (grade 0-1, grade 2-3, or grade 4)...
March 19, 2017: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
https://www.readbyqxmd.com/read/28319431/evaluation-of-the-risk-factors-for-a-rotator-cuff-retear-after-repair-surgery
#2
Yeong Seok Lee, Jeung Yeol Jeong, Chan-Deok Park, Seung Gyoon Kang, Jae Chul Yoo
BACKGROUND: A retear is a significant clinical problem after rotator cuff repair. However, no study has evaluated the retear rate with regard to the extent of footprint coverage. PURPOSE: To evaluate the preoperative and intraoperative factors for a retear after rotator cuff repair, and to confirm the relationship with the extent of footprint coverage. STUDY DESIGN: Cohort study; Level of evidence, 3. METHODS: Data were retrospectively collected from 693 patients who underwent arthroscopic rotator cuff repair between January 2006 and December 2014...
March 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28304118/causes-of-pain-and-loss-of-function-in-rotator-cuff-disease-analysis-of-1383-cases
#3
Anthony Maher, Warren Leigh, Matt Brick, Simon Young, Michael Caughey
BACKGROUND: The New Zealand Rotator Cuff Registry is a multicentre, nationwide prospective study of rotator cuff repairs established in March 2009. METHODS: A total of 1383 rotator cuff repairs were included in this study, all with completed baseline Flex-SF scores, pain scores and standardized operative forms. RESULTS: Increasing tear size and tear retraction, over 4 cm, were associated with decreasing Flex-SF scores but not pain. Tear area (a composite of tear size and retraction) is increased with advancing age, male gender and a traumatic history but not with smoking...
March 17, 2017: ANZ Journal of Surgery
https://www.readbyqxmd.com/read/28302994/effect-of-hypoxia-on-self-renewal-capacity-and-differentiation-in-human-tendon-derived-stem-cells
#4
Yang Yu, Lixiang Lin, Yifei Zhou, Xiaolang Lu, Xiwen Shao, Chuanlu Lin, Kehe Yu, Xiaolei Zhang, Jianjun Hong, Ying Chen
BACKGROUND Hypoxic conditions play roles in functioning of human tendon-derived stem cells (hTSCs). The goal of this study was to investigate the effect of various hypoxic conditions in self-renewal capacity and differentiation of TSCs. MATERIAL AND METHODS hTSCs was obtain from supraspinatus tendon donors. Colony formation and cell proliferation assay were used to assess the self-renewal of hTSCs. qRT-PCT and Western blot analysis were used to examine stemness and multi-differentiation potential of hTSCs. RESULTS We found that culturing at 5% O2 is more beneficial for the self-renewal of hTSCs than the other 3 culture conditions, with larger colony size and numbers...
March 17, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28275819/serial-clinical-and-mri-examinations-after-arthroscopic-rotator-cuff-reconstruction-using-double-row-technique
#5
F Pfalzer, J Huth, E Stürmer, D Endele, B Kniesel, F Mauch
PURPOSE: Rotator cuff reconstruction using arthroscopic double-row technique enables a better repair of the anatomical footprint at the tendon insertion. Objective of this serial study was to illustrate structural and functional results during recovery following double-row reconstruction. METHODS: Forty-five patients with mid-sized ruptures of the supraspinatus tendon were assessed prospectively and underwent arthroscopic surgery using the double-row technique. Rupture localization, size, form, and extent of retraction were recorded intraoperatively...
March 9, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28273425/can-preoperative-magnetic-resonance-imaging-predict-the-reparability-of-massiverotator-cuff-tears
#6
Jung Youn Kim, Ji Seon Park, Yong Girl Rhee
BACKGROUND: Numerous studies have shown preoperative fatty infiltration of rotator cuff muscles to be strongly negatively correlated with the successful repair of massive rotator cuff tears (RCTs). PURPOSE: To assess the association between factors identified on preoperative magnetic resonance imaging (MRI), especially infraspinatus fatty infiltration, and the reparability of massive RCTs. STUDY DESIGN: Case-control study; Level of evidence, 3...
March 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28272899/longitudinal-long-term-magnetic-resonance-imaging-and-clinical-follow-up-after-single-row-arthroscopic-rotator-cuff-repair
#7
Philipp R Heuberer, Daniel Smolen, Leo Pauzenberger, Fabian Plachel, Sylvia Salem, Brenda Laky, Bernhard Kriegleder, Werner Anderl
BACKGROUND: The number of arthroscopic rotator cuff surgeries is consistently increasing. Although generally considered successful, the reported number of retears after rotator cuff repair is substantial. Short-term clinical outcomes are reported to be rarely impaired by tendon retears, whereas to our knowledge, there is no study documenting long-term clinical outcomes and tendon integrity after arthroscopic rotator cuff repair. PURPOSE: To investigate longitudinal long-term repair integrity and clinical outcomes after arthroscopic rotator cuff reconstruction...
March 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28270140/the-magnitude-of-muscular-activation-of-four-canine-forelimb-muscles-in-dogs-performing-two-agility-specific-tasks
#8
Kimberley L Cullen, James P Dickey, Stephen H M Brown, Stephanie G Nykamp, Leah R Bent, Jeffrey J Thomason, Noël M M Moens
BACKGROUND: The purpose of this study was to measure the muscular activation in four forelimb muscles while dogs performed agility tasks (i.e., jumping and A-frame) and to provide insight into potential relationships between level of muscular activation and risk of injury. Muscle activation in eight healthy, client-owned agility dogs was measured using ultrasound-guided fine-wire electromyography of four specific forelimb muscles: Biceps Brachii, Supraspinatus, Infraspinatus, and Triceps Brachii - Long Head, while dogs performed a two jump sequence and while dogs ascended and descended an A-frame obstacle at two different competition heights...
March 7, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/28267909/-functional-evaluation-of-the-supraspinatus-tendon-repair-comparing-mini-open-and-open-techniques
#9
C R Mejía-Salazar, M Sierra-Pérez, M Ruiz-Suárez
OBJECTIVE: To compare two surgical techniques to address the painful shoulder syndrome with partial or total supraspinous tendon tear. METHODS: Patients with a diagnosis of complete supraspinous tendon tear who required surgical repair and subacromial decompression. One group was treated with acromioplasty and tendon plasty using an open approach (G1), and the second one underwent arthroscopy with tendon plasty using a minimally-invasive approach (G2). The surgical approach was not decided at random, but was based on the surgeons preference...
July 2016: Acta Ortopédica Mexicana
https://www.readbyqxmd.com/read/28267370/posterior-decentering-of-the-humeral-head-on-shoulder-mr-arthrography-significant-association-with-posterior-synovial-proliferation
#10
Gabin Yun, Yusuhn Kang, Joong Mo Ahn, Eugene Lee, Joon Woo Lee, Joo Han Oh, Heung Sik Kang
OBJECTIVE: The purpose of this study is to analyze MRI findings associated with posterior decentering of the humeral head on shoulder MR arthrogram. MATERIALS AND METHODS: A total of 255 MR arthrograms were obtained during a 10-month period. MR arthrograms in patients with posterior decentering of the humeral head (n = 33) were reviewed and compared with those of randomly selected control group without posterior decentering (n = 66). MR arthrograms were retrospectively evaluated by two observers for posterior factors (posterior synovial proliferation, posterior capsular thickening, and posterior labral abnormality), rotator cuff factors related to fatty degeneration, glenoid version, and anterior factors (subcoracoid bursa effusion and rotator interval tear)...
March 7, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28261304/the-influence-of-different-footprint-preparation-techniques-on-tissue-regeneration-in-rotator-cuff-repair-in-an-animal-model
#11
Andreas Ficklscherer, Michaela Serr, Thomas Loitsch, Thomas R Niethammer, Matthias Lahner, Matthias F Pietschmann, Peter E Müller
INTRODUCTION: Rotator cuff tears are common diseases of the upper extremity. There are no recommendations to the surgeon on how to prepare the footprint to ensure optimal tendon-to-bone healing. However, biologic augmentation using stem cells and growth factors is considered to encourage the healing process of the tendon. The aim of the study was to investigate the biomechanical and histological outcome of different footprint preparations in rotator cuff repair. MATERIAL AND METHODS: One hundred and eighty-nine Sprague-Dawley rats were randomly assigned to either spongialization, radiofrequency ablation or an untreated control group...
March 1, 2017: Archives of Medical Science: AMS
https://www.readbyqxmd.com/read/28254072/automatic-segmentation-of-supraspinatus-from-mri-by-internal-shape-fitting-and-autocorrection
#12
Sunhee Kim, Deukhee Lee, Sehyung Park, Kyung-Soo Oh, Seok Won Chung, Youngjun Kim
BACKGROUND AND OBJECTIVES: With significant increase in the number of people suffering from shoulder problems, the automatic image segmentation of the supraspinatus (one of the shoulder muscles) has become necessary for efficient and deliberate diagnosis and surgery. In this study, we developed an automatic segmentation method to extract the three-dimensional (3D) configuration of the supraspinatus, and we compared our segmentation results with reference segmentations obtained by experts...
March 2017: Computer Methods and Programs in Biomedicine
https://www.readbyqxmd.com/read/28229565/calcifying-tendinitis-of-the-long-head-of-the-biceps-brachii-and-superior-labrum-a-report-of-one-case-and-literature-review
#13
Xing-He Xue, Zhen-Hua Feng, Zhen-Xing Li, Xiao-Yun Pan
INTRODUCTION: Calcifying tendinitis of the shoulder is characterized with the formation of the calcium deposits in tendon, which mostly involves supraspinatus. The formation of the calcium deposits may be related to the excessive mechanical stimulation and non-tenocytes generation from tendon stem cell. The disease is usually associated with pain, especially when activating the shoulder. MATERIALS AND METHODS: We describe one case of calcifying tendinitis involving the long head of the biceps brachii and superior labrum...
February 22, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28214172/does-successful-rotator-cuff-repair-improve-muscle-atrophy-and-fatty-infiltration-of-the-rotator-cuff-a-retrospective-magnetic-resonance-imaging-study-performed-shortly-after-surgery-as-a-reference
#14
Noritaka Hamano, Atsushi Yamamoto, Hitoshi Shitara, Tsuyoshi Ichinose, Daisuke Shimoyama, Tsuyoshi Sasaki, Tsutomu Kobayashi, Yohei Kakuta, Toshihisa Osawa, Kenji Takagishi
BACKGROUND: Muscle atrophy and fatty infiltration in the rotator cuff muscles are often observed in patients with chronic rotator cuff tears. The recovery from these conditions has not been clarified. METHODS: Ninety-four patients were included in this study. The improvement in muscle atrophy and fatty infiltration in successfully repaired rotator cuff tears was evaluated by magnetic resonance imaging at 1 year and 2 years after surgery and was compared with muscle atrophy and fatty infiltration observed on magnetic resonance imaging at 2 weeks after surgery to discount any changes due to the medial retraction of the torn tendon...
February 15, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28197872/mr-arthrography-of-the-shoulder-evaluation-of-isotropic-3d-intermediate-weighted-fse-and-hybrid-gre-t1-weighted-sequences
#15
Giovanni Foti, Paolo Avanzi, William Mantovani, Flavia Dal Corso, Emanuele Demozzi, Claudio Zorzi, Giovanni Carbognin
PURPOSE: To compare the diagnostic accuracy of three-dimensional (3D) fast spin echo (FSE) intermediate-weighed (IW-3D) and 3D hybrid double-echo steady-state T1-weighted sequences (Hy-3D) and two-dimensional (FSE) images (2D) at shoulder MR arthrography (MRA). MATERIALS AND METHODS: Institutional review board approval was obtained and informed consent was waived for this retrospective study. From September 2011 to October 2014, 102 patients who had undergone 1...
February 15, 2017: La Radiologia Medica
https://www.readbyqxmd.com/read/28197744/efficiency-of-quantitative-echogenicity-for-investigating-supraspinatus-tendinopathy-by-the-gray-level-histogram-of-two-ultrasound-devices
#16
Jiun-Cheng Hsu, Po-Han Chen, Kuo-Chin Huang, Yao-Hung Tsai, Wei-Hsiu Hsu
PURPOSE: The gray-level histogram of ultrasound is a promising tool for scanning the hypoechogenic appearance of supraspinatus tendinopathy, and the aim of this study was to test the hypothesis that the gray-level value of the supraspinatus tendon in the painful shoulder has a lower value on B-mode images even though in different ultrasound devices. METHODS: Sixty-seven patients who had unilateral shoulder pain with rotator cuff tendinopathy underwent bilateral shoulder ultrasonography, and we compared the mean gray-level values of painful shoulders and contralateral shoulders without any pain in each patient using two ultrasound devices...
February 14, 2017: Journal of Medical Ultrasonics
https://www.readbyqxmd.com/read/28196035/perivascular-stem-cells-diminish-muscle-atrophy-following-massive-rotator-cuff-tears-in-a-small-animal-model
#17
Claire D Eliasberg, Ayelet Dar, Andrew R Jensen, Iain R Murray, Winters R Hardy, Tomasz J Kowalski, Cameron A Garagozlo, Kyle M Natsuhara, Adam Z Khan, Owen J McBride, Peter I Cha, Benjamin V Kelley, Denis Evseenko, Brian T Feeley, David R McAllister, Bruno Péault, Frank A Petrigliano
BACKGROUND: Rotator cuff tears are a common cause of shoulder pain and often necessitate operative repair. Muscle atrophy, fibrosis, and fatty infiltration can develop after rotator cuff tears, which may compromise surgical outcomes. This study investigated the regenerative potential of 2 human adipose-derived progenitor cell lineages in a murine model of massive rotator cuff tears. METHODS: Ninety immunodeficient mice were used (15 groups of 6 mice). Mice were assigned to 1 of 3 surgical procedures: sham, supraspinatus and infraspinatus tendon transection (TT), or TT and denervation via suprascapular nerve transection (TT + DN)...
February 15, 2017: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/28192875/functions-of-the-subregions-of-the-supraspinatus-muscle
#18
Takuma Yuri, Yoshiki Kuwahara, Hiromi Fujii, Yoshiro Kiyoshige
The aim of this study was to investigate the functions of the six subregions of the supraspinatus muscle (SSP) determined by Kim et al. in Clin Anat 2007;20:648-655, using real-time tissue elastography (RTE). Twelve young male volunteers participated. The muscular hardness of the SSP was measured at rest and with contraction of the MMT3 in internal, neutral and external rotations. The SSP was functionally divided into five groups on the basis of the RTE results. These functional areas were roughly classified into three property groups: the anterior-superficial, anterior-middle, and anterior-deep subregions, which produce contractile force for abduction; the posterior-deep subregion, which produces contractile force for external rotation; and the posterior-superficial and posterior-middle subregions, which maintain tension...
April 2017: Clinical Anatomy
https://www.readbyqxmd.com/read/28188359/in-vivo-analysis-of-coracoid-and-subacromial-shoulder-impingement-mechanism-during-clinical-examination
#19
Tim Leschinger, Christopher Wallraff, Dirk Müller, Matthias Hackenbroch, Henning Bovenschulte, Jan Siewe
BACKGROUND: Understanding the mechanisms of shoulder impingement created by clinical tests is crucial to accurately evaluate the condition. The objective of this study was to relate mechanisms of subacromial and coracoid impingement occurring in positions of the shoulder during clinical examination, in quantitative and qualitative terms. METHODS: A 1.0T open magnetic resonance imaging system was used in 18 female and 19 male subjects, to determine the distances between the humeral head and the acromion or coracoid, and contact with the rotator cuff (RC)...
February 11, 2017: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
https://www.readbyqxmd.com/read/28162888/the-effectiveness-of-demineralized-cortical-bone-matrix-in-a-chronic-rotator-cuff-tear-model
#20
Tanujan Thangarajah, Frederick Henshaw, Anita Sanghani-Kerai, Simon M Lambert, Gordon W Blunn, Catherine J Pendegrass
BACKGROUND: The purpose of this study was to assess the effect of demineralized bone matrix (DBM) on rotator cuff tendon-bone healing. The hypothesis was that compared with a commercially available dermal matrix scaffold, DBM would result in a higher bone mineral density and regenerate a morphologically superior enthesis in a rat model of chronic rotator cuff degeneration. METHODS: Eighteen female Wistar rats underwent unilateral detachment of the supraspinatus tendon...
February 2, 2017: Journal of Shoulder and Elbow Surgery
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