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https://www.readbyqxmd.com/read/28821629/effects-of-spaceflight-on-the-muscles-of-the-murine-shoulder
#1
Hua Shen, Chanteak Lim, Andrea G Schwartz, Alexander Andreev-Andrievskiy, Alix C Deymier, Stavros Thomopoulos
Mechanical loading is necessary for the development and maintenance of the musculoskeletal system. Removal of loading via microgravity, paralysis, or bed rest leads to rapid loss of muscle mass and function; however, the molecular mechanisms that lead to these changes are largely unknown, particularly for the spaceflight (SF) microgravity environment. Furthermore, few studies have explored these effects on the shoulder, a dynamically stabilized joint with a large range of motion; therefore, we examined the effects of microgravity on mouse shoulder muscles for the 15-d Space Transportation System (STS)-131, 13-d STS-135, and 30-d Bion-M1 missions...
August 17, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/28820278/does-additional-biceps-augmentation-improve-rotator-cuff-healing-and-clinical-outcomes-in-anterior-l-shaped-rotator-cuff-tears-clinical-comparisons-with-arthroscopic-partial-repair
#2
Yoon Sang Jeon, Juyeob Lee, Rag Gyu Kim, Young-Won Ko, Sang-Jin Shin
BACKGROUND: The repair of anterior L-shaped tears is usually difficult because of the lack of anterior rotator cuff tendon to cover the footprint. The biceps tendon is usually exposed from the retracted anterolateral corner of the torn tendon and can be easily used to augment rotator cuff repair. Hypothesis/Purpose: This study compared the clinical outcomes of the biceps augmentation technique with those of partial tendon repair for the arthroscopic treatment of large anterior L-shaped rotator cuff tears to evaluate the role of additional biceps augmentation in tendon healing...
August 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28819610/a-rare-case-of-massive-rotator-cuff-tear-and-biceps-tendon-rupture-with-posterior-shoulder-dislocation-in-a-young-adult-surgical-decision-making-and-outcome
#3
En Loong Soon, Hamid Rahmatullah Bin Abd Razak, Andrew Hwee Chye Tan
INTRODUCTION: Massive rotator cuff tears (RCTs) in the context of shoulder dislocations are relatively uncommon in the young adult (<40 years) and if reported are more commonly described in association with acute traumatic anterior glenohumeral dislocations. They have rarely been described with posterior dislocations, regardless of patient age. This is the 1(st) case reported in the context of posterior dislocations, where a triad of biceps tendon rupture, posterior dislocation, and RCTs was observed during surgery...
March 2017: Journal of Orthopaedic Case Reports
https://www.readbyqxmd.com/read/28819609/combined-fluoroscopic-and-arthroscopic-detection-and-removal-of-a-foreign-body-lost-during-elective-shoulder-arthroscopy-a-case-report
#4
Uli Schmiddem, N Hawi, E M Suero, R Meller
INTRODUCTION: We report a case of a lost metal platelet from a radiofrequency ablation probe (VAPR VUE Radiofrequency System, Cool Pulse 90, DePuy, Synthes, Switzerland) in the shoulder joint during elective arthroscopic cuff repair. To the best of our knowledge, this kind of an incident during elective arthroscopy has not been described in the literature so far. In addition, we present an algorithm on how to deal with such an incident. CASE REPORT: A 69-year-old woman underwent an arthroscopic subacromial decompression and rotator cuff repair for a torn supraspinatus tendon...
March 2017: Journal of Orthopaedic Case Reports
https://www.readbyqxmd.com/read/28819606/intra-articular-loose-body-with-concomitant-bankart-lesion-after-a-traumatic-shoulder-dislocation-a-case-report
#5
Jason B T Lim, Andrew H C Tan
INTRODUCTION: The spectrum of pathoanatomic lesions encountered in anterior shoulder dislocation is broad. There could be a presence of loose bodies, chondral and osteochondral, in the shoulder joint and also concomitant rotator cuff partial tears resulting from acute and chronic shoulder instability. CASE REPORT: We present one case report of a 46-year-old male Chinese with an uncommon case of Bankart lesion, with a full thickness chondral defect over the superior glenoid articular surface manifesting as a large intra-articular loose cartilaginous body...
March 2017: Journal of Orthopaedic Case Reports
https://www.readbyqxmd.com/read/28819463/role-and-correlation-of-high-resolution-ultrasound-and-magnetic-resonance-imaging-in-evaluation-of-patients-with-shoulder-pain
#6
Amandeep Singh, Chuni Lal Thukral, Kamlesh Gupta, Mahesh Inder Singh, Sneh Lata, Ram Krishan Arora
BACKGROUND: The study aimed to evaluate of the role of high-resolution ultrasound and magnetic resonance imaging in patients with shoulder pain. MATERIAL/METHODS: This prospective study included 50 patients referred for ultrasound and MRI because of shoulder pain. All patients were examined clinically, followed by radiography of the affected shoulder. High-resolution ultrasound examination of the involved shoulder was performed together with an examination of the contralateral normal shoulder, followed by MRI of the symptomatic shoulder in all 50 patients...
2017: Polish Journal of Radiology
https://www.readbyqxmd.com/read/28816895/ten-year-multicenter-clinical-and-mri-evaluation-of-isolated-supraspinatus-repairs
#7
Philippe Collin, Jean-François Kempf, Daniel Mole Combining Acute Accent, Nicolas Meyer, Charles Agout, Mo Saffarini, Arnaud Godene Combining Grave Accent Che
BACKGROUND: Early repair of isolated supraspinatus tears could prevent further deterioration of the rotator cuff; however, there is no consensus on the management of such tears because of a lack of long-term outcome studies. The purposes of this study were to report the 10-year outcomes of isolated supraspinatus repairs and to investigate the factors that favor healing and recovery. METHODS: We retrieved the records of all 511 patients who, in 2003, underwent repair of full-thickness isolated supraspinatus tears, performed by 15 surgeons at 15 centers...
August 16, 2017: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/28816097/meltblown-polymer-fabrics-as-candidate-scaffolds-for-rotator-cuff-tendon-tissue-engineering
#8
Thomas Jenkins, Sean Meehan, Behnam Pourdeyhimi, Dianne Little
Various biomaterial technologies are promising for tissue engineering, including electrospinning, but commercial scale-up of throughput is difficult. The goal of the study was to evaluate meltblown fabrics as candidate scaffolds for rotator cuff tendon tissue engineering. Meltblown poly(lactic acid) fabrics were produced with several polymer crystallinities and airflow velocities (500(low), 900(medium) or 1400(high) m<sup>3</sup>air/hour/m fabric). Fiber diameter, alignment, and baseline bi-directional tensile mechanical properties were evaluated...
August 17, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28815297/leukocyte-reduced-platelet-rich-plasma-increases-proliferation-of-tenocytes-treated-with-prednisolone-a-cell-cycle-analysis
#9
Franz Hilber, Markus Loibl, Siegmund Lang, Maximilian Kerschbaum, Gero Brockhoff, Peter Angele, Johannes Zellner, Paul Schmitz, Michael Nerlich, Michael Worlicek
INTRODUCTION: The purpose of this study was to evaluate the effect of allogenic leukocyte-reduced platelet-rich plasma on human tenocytes after treatment with prednisolone and to develop a standardization of its application for clinical practice. METHODS: A leukocyte-reduced PRP was produced using the Arthrex Double Syringe (Arthrex, Inc., Naples, FL, USA), in a modified single-spin separation method. Human tenocytes were isolated from discarded rotator cuff segments...
August 16, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/28806095/a-midterm-evaluation-of-postoperative-platelet-rich-plasma-injections-on-arthroscopic-supraspinatus-repair-a-randomized-controlled-trial
#10
Jay R Ebert, Allan Wang, Anne Smith, Robert Nairn, William Breidahl, Ming Hao Zheng, Timothy Ackland
BACKGROUND: Platelet-rich plasma (PRP) has been applied as an adjunct to rotator cuff repair to improve tendon-bone healing and potentially reduce the incidence of subsequent tendon retears. PURPOSE: To investigate whether the midterm clinical and radiographic outcomes of arthroscopic supraspinatus repair are enhanced after repeated postoperative applications of PRP. STUDY DESIGN: Randomized controlled trial; Level of evidence, 1. METHODS: A total of 60 patients (30 control; 30 PRP) were initially randomized to receive 2 ultrasound-guided injections of PRP to the tendon repair site at 7 and 14 days after double-row arthroscopic supraspinatus repair or not...
August 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28806093/critical-shoulder-angle-and-acromial-index-do-not-influence-24-month-functional-outcome-after-arthroscopic-rotator-cuff-repair
#11
Merrill Lee, Jerry Yongqian Chen, Ming Han Lincoln Liow, Hwei Chi Chong, Paul Chang, Denny Lie
BACKGROUND: Recent studies have shown a correlation between scapular geometry and the development of atraumatic rotator cuff tears. However, a paucity of literature is available on the effects of critical shoulder angle (CSA) and acromial index (AI) on functional outcomes after arthroscopic rotator cuff repair. Hypothesis/Purpose: The purpose was to investigate the influence of CSA and AI on 24-month functional outcomes after arthroscopic rotator cuff repair. The hypothesis was that a larger CSA or AI would result in poorer postoperative outcomes...
August 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28803796/shoulder-muscle-activation-patterns-and-levels-differ-between-open-and-closed-chain-abduction
#12
Darren Reed, Ian Cathers, Mark Halaki, Karen A Ginn
OBJECTIVES: Open and closed-chain abduction of the shoulder are commonly used in rehabilitation and exercise programs to assess and/or improve shoulder muscle function. However, it is not known if shoulder muscle activation patterns differ between these two exercises. Therefore the purpose of this study was to compare muscle activation patterns during closed-chain shoulder abduction performed using a shoulder press machine with open-chain abduction using free weights. DESIGN: Experimental study...
August 2, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28801199/repositioning-the-scapula-with-taping-following-distal-radius-fracture-kinematic-analysis-using-3-dimensional-motion-system
#13
Elif Turgut, Cigdem Ayhan, Gul Baltaci
STUDY DESIGN: Cross-sectional and controlled laboratory study using pretest-posttest design. INTRODUCTION: Patients with distal radius fracture (DRfx) report proximal segment problems. Taping is commonly recommended because it provides improved posture and function. PURPOSE OF THE STUDY: This study aimed to investigate the 3-dimensional scapular kinematics and the effect of taping on the kinematics in participants with DRfx. METHODS: Twenty participants with a unilateral history of DRfx and 20 healthy controls participated...
August 8, 2017: Journal of Hand Therapy: Official Journal of the American Society of Hand Therapists
https://www.readbyqxmd.com/read/28795072/infection-rates-in-arthroscopic-versus-open-rotator-cuff-repair
#14
Jonathan D Hughes, Jessica L Hughes, Justin H Bartley, William P Hamilton, Kindyle L Brennan
BACKGROUND: The prevalence of rotator cuff repair continues to rise, with a noted transition from open to arthroscopic techniques in recent years. One reported advantage of arthroscopic repair is a lower infection rate. However, to date, the infection rates of these 2 techniques have not been directly compared with large samples at a single institution with fully integrated medical records. PURPOSE: To retrospectively compare postoperative infection rates between arthroscopic and open rotator cuff repair...
July 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28794583/comparison-of-epidemiology-and-outcomes-of-arthroscopic-rotator-cuff-repair-for-anterosuperior-and-posterosuperior-rotator-cuff-tears
#15
Takeshi Teratani
BACKGROUND: The purpose of this study was to investigate the prevalence, epidemiology, and outcomes of anterosuperior (A group) rotator cuff tears (RCTs) and posterosuperior (P group) RCTs treated by arthroscopic rotator cuff repair (ARCR). METHODS: A total of 67 A group patients and 14 P group patients were included in the study. RESULTS: The prevalence of the A group (82.3%) was significantly higher than that of the P group (17.7%). CONCLUSION: The outcomes in both groups were good, even though the A group had a higher rate of injury to the LHB than the P group...
December 2017: Journal of Orthopaedics
https://www.readbyqxmd.com/read/28794582/what-are-the-anatomical-predictive-factors-of-degenerative-superior-labrum-anterior-to-posterior-lesion-in-rotator-cuff-tear
#16
Joong-Bae Seo, Jae-Sung Yoo, Joon-Yeul Lee, Kyoo-Hong Han
The purpose of this study was to evaluate the influence of anatomical factors degenerative superior labrum anterior to posterior lesion in rotator cuff tear. The study included 421 middle-aged patients treated using arthroscopic surgery for rotator cuff tears. Patients were divided into two groups based on the superior labrum anterior-to-posterior (SLAP). Glenoid inclination, glenoid length, humeral head diameter, acromio-humeral distance (AHD) head-glenoid difference (HGD), head glenoid angle (HGA), size and retraction of rotator cuff tears were evaluated in both groups...
December 2017: Journal of Orthopaedics
https://www.readbyqxmd.com/read/28792082/rotator-cuff-healing-using-demineralized-cancellous-bone-matrix-sponge-interposition-compared-to-standard-repair-in-a-preclinical-canine-model
#17
Matthew J Smith, Ferris M Pfeiffer, Cristi R Cook, Keiichi Kuroki, James L Cook
This Level II study assessed clinically relevant outcomes for repair of large, retracted infraspinatus tendons (ISTs) using a demineralized bone matrix (DBM) sponge (FlexiGraft) hydrated in platelet-rich plasma (PRP) versus direct repair in a validated canine model. Adult research dogs (n = 10) were used. The IST was transected in each shoulder (n = 20) and randomized to direct repair or repair with DBM-PRP interposition at 4 weeks posttransection. At 12 weeks postrepair, dogs were sacrificed, and the repair evaluated by magnetic resonance imaging (MRI), histology, and biomechanical testing...
August 9, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28781978/a-prospective-quantitative-evaluation-of-fatty-infiltration-before-and-after-rotator-cuff-repair
#18
Drew A Lansdown, Sonia Lee, Craig Sam, Roland Krug, Brian T Feeley, C Benjamin Ma
BACKGROUND: Current evaluation of muscle fatty infiltration has been limited by subjective classifications. Quantitative fat evaluation through magnetic resonance imaging (MRI) may allow for an improved longitudinal evaluation of the effect of surgical repair on the progression of fatty infiltration. HYPOTHESES: We hypothesized that (1) patients with isolated full-thickness supraspinatus tendon tears would have less progression in fatty infiltration compared with patients with full-thickness tears of multiple tendons and (2) patients with eventual failed repair would have higher baseline levels of fatty infiltration...
July 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28780703/radiolucent-rings-around-bioabsorbable-anchors-after-rotator-cuff-repair-are-not-associated-with-clinical-outcomes
#19
Jin-Young Park, Suk-Hwan Jang, Kyung-Soo Oh, Yi Jin Li
PURPOSE: Various researchers have observed small areas of osteolysis after using bioabsorbable anchors in shoulder surgeries. The purpose of this study is to determine whether radiographic perianchor radiolucent rings after rotator cuff repair are associated with the failure of repair and also assess their clinical implications. Further, the most frequent location of the radiolucent rings in the double-row suture bridge configuration was also assessed. METHODS: One hundred and twenty-nine consecutive patients who underwent arthroscopic rotator cuff repair by suture bridge technique were retrospectively evaluated radiographically and clinically...
August 5, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/28780211/the-use-of-osteopathic-manual-therapy-and-rehabilitation-for-subacromial-impingement-syndrome-a-case-report
#20
Sam Bennett, Chris Macfarlane, Brett Vaughan
Rotator cuff dysfunction is common in athletes involved with overhead sports. Secondary subacromial impingement is a common cause of pain for patients with rotator cuff dysfunction. Exercise rehabilitation and manual therapy can be used in the treatment of subacromial impingement to decrease pain, increase functionality and support a return to activity. The current case report describes a 24-year-old patient with supraspinatus tendinosis and secondary subacromial impingement who was experiencing pain when playing tennis, and during daily activities involving overhead movements...
July 11, 2017: Explore: the Journal of Science and Healing
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