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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/28819606/intra-articular-loose-body-with-concomitant-bankart-lesion-after-a-traumatic-shoulder-dislocation-a-case-report
#2
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/28808982/radial-head-prosthesis-results-overview
#3
E Carità, A Donadelli, L Cugola, P Perazzini
BACKGROUND/PURPOSE: Radial head replacement is frequently used in treatment of radial head fractures or sequela. Impossibility to restore a correct anatomy, acute elbow traumatic instability and failure of osteosynthesis hardware are the most common indications. The authors describe their case studies and results on the implantation of various radial head prostheses. MATERIALS: Between June 2005 and June 2016, 28 radial head prostheses were implanted in the same number of patients with an average follow-up of 49 months (6-104)...
August 14, 2017: Musculoskeletal Surgery
https://www.readbyqxmd.com/read/28803796/shoulder-muscle-activation-patterns-and-levels-differ-between-open-and-closed-chain-abduction
#4
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/28802419/recalcitrant-aseptic-atrophic-non-union-of-the-shaft-of-the-humerus-after-failure-of-surgical-treatment-management-by-excision-of-non-union-bone-grafting-and-stabilization-by-lcp-in-different-modes
#5
Sudhir Babhulkar, Sushrut Babhulkar, Aditya Vasudev
Non-union of the humeral shaft is infrequently noticed after surgical fixation. Sixty eight patients whose osteosynthesis of humeral shaft had failed leading to non-union were identified over a duration of 10 years from (January 2006 to December 2015). Clinical and radiographical follow-up was available for 64 patients (4 patients were lost for follow-up), with a mean age of 58 years (range 25-78 years). All patients had aseptic atrophic non-union of either: proximal shaft (n=12), mid shaft (n=38), and lower shaft (n=14)...
August 2017: Injury
https://www.readbyqxmd.com/read/28800708/multiplanar-correction-of-the-lesser-digital-deviation-and-indirect-plantar-plate-rupture-repair-using-a-braided-polyethylene-nylon-suture-a-technique-guide
#6
Cody D Blazek, Roberto A Brandão, Jeffrey M Manway, Patrick R Burns
Forefoot and lesser digital pathology continues to be a challenging area of surgical correction for foot and ankle surgeons. Many techniques for the correction of digital deformities secondary to plantar plate rupture, regardless of planal dominance, have been described including direct repair and metatarsal shortening osteotomies for repair. The authors present a new technique for multiplanar correction of deformed lesser digits without direct repair of the plantar plate rupture utilizing a specialty suture...
August 1, 2017: Foot & Ankle Specialist
https://www.readbyqxmd.com/read/28799049/-diagnostics-and-treatment-concepts-for-anteroinferior-shoulder-instability-current-trends
#7
F Martetschläger, M Tauber, P Habermeyer
Shoulder instability arises when static or dynamic stabilizers deviate from the natural equilibrium. The most common form of shoulder instability is in an anteroinferior direction, affects young athletes in contact sports and can lead to permanent impairment of shoulder function and early degeneration of the joint. Conservative as well as operative therapy options have been controversially discussed for years. This article describes the current state of diagnostics, current trends in therapy decisions and relevant therapy options for anterior shoulder instability...
August 10, 2017: Der Orthopäde
https://www.readbyqxmd.com/read/28791848/closed-reduction-and-percutaneous-annulated-screw-fixation-in-the-treatment-of-comminuted-proximal-humeral-fractures
#8
Zhe Yu, Lianhe Zheng, Xiaodong Yan, Xiaoxiang Li, Jian Zhao, Bao'an Ma
BACKGROUND: Displaced proximal humeral fractures remain a challenge to orthopedic surgeons. OBJECTIVES: The purpose of this study was to evaluate the functional and radiological outcomes of patients with comminuted proximal humeral fractures treated with closed reduction and percutaneous screw fixation (CRPF). MATERIAL AND METHODS: The authors retrospectively reviewed 38 cases of displaced proximal humeral fractures (2-, 3- or 4-part fractures according to the Neer classification) that were treated using the CRPF technique from May 2009 to April 2013...
March 2017: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
https://www.readbyqxmd.com/read/28782096/the-prevention-of-musculoskeletal-injuries-in-volleyball-the-systematic-development-of-an-intervention-and-its-feasibility
#9
Vincent Gouttebarge, Marije van Sluis, Evert Verhagen, Johannes Zwerver
BACKGROUND: A scientific research project has started in the Netherlands with the aim of developing and implementing an evidence-based intervention to prevent the occurrence of musculoskeletal injuries among young and adult recreational volleyball players. This article describes (i) the systematic development of the intervention; and (ii) the assessment of its feasibility in terms of relevancy, suitability and usability. SYSTEMATIC DEVELOPMENT OF THE INTERVENTION: The development of the intervention was based on the Intervention Mapping structured and systematic process...
December 2017: Injury Epidemiology
https://www.readbyqxmd.com/read/28777219/anterior-glenohumeral-instability
#10
Adam Pickett, Steven Svoboda
Anterior shoulder dislocations, subluxations, and recurrent instability of the shoulder joint are common problems usually affecting a young active population. However, it can be a problem for patients up to the late decades in life and can lead to major shoulder arthropathy if left untreated or improperly treated. This article discusses the natural history, pathologic morphologic changes of the shoulder joint associated with anterior instability along with normal anatomic variants. We will also discuss current treatment recommendations and possible causes of the patient with recurrent instability despite prior stabilization procedures...
September 2017: Sports Medicine and Arthroscopy Review
https://www.readbyqxmd.com/read/28777214/recurrent-shoulder-instability-after-primary-bankart-repair
#11
Michael A Donohue, Timothy C Mauntel, Jonathan F Dickens
The glenohumeral joint is one of the most frequently dislocated joints and occurs with increasing frequency in collision and contact athletes, especially those in sports that repeatedly place the glenohumeral joint in a position of vulnerability. Nonoperative management of shoulder instability especially in young contact athletes results in unacceptably high recurrence rates; thus, early surgical stabilization has become commonplace. Surgical stabilization typically yields acceptable outcomes. However, recurrent anterior instability may occur following a previous stabilization procedure at rates of 7% to 12%...
September 2017: Sports Medicine and Arthroscopy Review
https://www.readbyqxmd.com/read/28771373/biomechanical-evaluation-of-glenoid-reconstruction-with-an-implant-free-j-bone-graft-for-anterior-glenoid-bone-loss
#12
Leo Pauzenberger, Felix Dyrna, Elifho Obopilwe, Philipp R Heuberer, Robert A Arciero, Werner Anderl, Augustus D Mazzocca
BACKGROUND: The anatomic restoration of glenoid morphology with an implant-free J-shaped iliac crest bone graft offers an alternative to currently widely used glenoid reconstruction techniques. No biomechanical data on the J-bone grafting technique are currently available. PURPOSE: To evaluate (1) glenohumeral contact patterns, (2) graft fixation under cyclic loading, and (3) the initial stabilizing effect of anatomic glenoid reconstruction with the implant-free J-bone grafting technique...
August 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28762021/retroverted-glenoid-reconstruction-using-glenoid-plate-in-reverse-shoulder-arthroplasty
#13
R Lanzone, S Carbone, P Albino, J-B Cassio, P Métais
PURPOSE: The objective of this study is to evaluate the clinical and radiological results of reverse shoulder arthroplasty (RSA) with glenoid plating in a consecutive series of patients affected by cuff tear glenohumeral arthropathy with glenoid retroversion >15°. We hypothesized that autologous humeral head graft may be better stabilized between the baseplate and the native glenoid surface with the use of a glenoid plate. METHODS: Twenty consecutive patients affected by cuff tear arthropathy with glenoid retroversion >15° (B2 or C according to Walch classification) were enrolled in this study...
July 31, 2017: Musculoskeletal Surgery
https://www.readbyqxmd.com/read/28756509/glenohumeral-and-scapulohumeral-kinematic-analysis-of-patients-with-traumatic-anterior-instability-wearing-a-shoulder-brace-a-prospective-laboratory-study
#14
F Dellabiancia, I Parel, M V Filippi, G Porcellini, G Merolla
PURPOSE: To assess the effectiveness of a novel glenohumeral joint immobilizer, the S2 Shoulder Stabilizer(®), by evaluating shoulder kinematics with a stereophotogrammetry system. METHODS: Participants in this prospective laboratory study were recruited from patients with anterior traumatic instability awaiting arthroscopic glenohumeral stabilization. Glenohumeral and scapulohumeral kinematic data (arm abduction-adduction and internal-external rotation, and scapular pronation-retraction and mediolateral rotation) were collected twice, without and with the brace, using a VICON™ motion capture system, and processed with MATLAB(®) software...
July 29, 2017: Musculoskeletal Surgery
https://www.readbyqxmd.com/read/28751995/-monocept-a-brief-report-of-congenital-absence-of-the-long-head-of-the-biceps-tendon-and-literature-review
#15
Benjamin A Winston, Katlyn Robinson, Dennis Crawford
The long head of the biceps tendon plays an important role in shoulder stability and its functional absence has been shown to contribute to glenohumeral instability. Congenital absence of the long head to the biceps tendon is rare, although described in the literature. We report the case of an 18-year-old recreational athlete with recurrent shoulder instability and congenital absence of the long head of the biceps tendon (which we term "monocept") and mild ipsilateral upper extremity hemimelia. The patient was treated surgically with posterior capsular shift with anterior Bankart repair without complication...
2017: Case Reports in Orthopedics
https://www.readbyqxmd.com/read/28751170/rehabilitation-of-distal-radioulnar-joint-instability
#16
G Mesplié, V Grelet, O Léger, S Lemoine, D Ricarrère, C Geoffroy
Distal radioulnar joint (DRUJ) instabilities are common and often combined with other injuries of the interosseous membrane and/or the proximal radioulnar joint. Once they are diagnosed and the treatment is chosen, physiotherapists have limited choices due to the lack of validated protocols. The benefits of proprioception and neuromuscular rehabilitation have been brought to light for the shoulder, knee and ankle joints, among others. However, no program has been described for the DRUJ. The purpose of this article is to study the muscular elements responsible for active DRUJ stability, and to propose a proprioceptive rehabilitation program suited to this condition...
July 24, 2017: Hand Surgery and Rehabilitation
https://www.readbyqxmd.com/read/28750976/scapular-dyskinesis-among-competitive-swimmers
#17
Maayan Bussiba Maor, Tatyana Ronin, Leonid Kalichman
AIM: To evaluate the prevalence of scapular dyskinesis (SD) in competitive swimmers during training sessions. METHODS: Repeated measurement observational study.20 young competitive swimmers were filmed before, at midpoint and at the end of a training session, performing shoulder flexion and abduction. SD was examined separately by two assessors. Demographic and Quick Disabilities of the Arm, Shoulder, and Hand questionnaires were collected. RESULTS: SD was observed in 30% of the swimmers before training, in 70%, an hour later, and in 80%, upon completion of the training session...
July 2017: Journal of Bodywork and Movement Therapies
https://www.readbyqxmd.com/read/28747277/glenosphere-size-in-reverse-shoulder-arthroplasty-is-larger-better-for-external-rotation-and-abduction-strength
#18
Andreas M Müller, Marian Born, Christian Jung, Matthias Flury, Christoph Kolling, Hans-Kaspar Schwyzer, Laurent Audigé
BACKGROUND: The role of glenosphere size in reverse shoulder arthroplasty (RSA) may be important in prosthetic stability, joint kinematics, rotator cuff tension and excursion, scapular impingement, humeral lateralization, deltoid wrap, and the occurrence of "notching." This study compared short- and midterm clinical and radiographic outcomes for 2 different glenosphere sizes of a single RSA type with respect to implant positioning, glenoid size, and morphology. METHODS: This retrospective analysis included 68 RSA procedures that were prospectively documented in a local register during a 5-year postoperative period...
July 24, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28746244/the-effect-of-unicycle-riding-course-on-trunk-strength-and-trunk-stability-functions-in-children
#19
Andrej Kocjan, Nejc Sarabon
PURPOSE: The aim of the study was to assess the effect of unicycling on trunk strength and timing of automatic stability actions of the selected trunk muscles (multifidus, obliquus externus, erector spine). METHODS: Twenty healthy 12-year-old children (12 boys, 8 girls; age 12.1 ± 0.2 yrs; body height 1.57 ± 0.05 m; body mass 52.8 ± 10.6 kg) were assigned to experimental and control group. Experimental group performed a supervised 12-session course of unicycling...
July 24, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28741077/-chronic-acromioclavicular-joint-injury-of-rockwood-v-type-with-concomitant-chronic-anterior-sternoclavicular-instability
#20
Sebastian Schmitt, Petra Magosch, Peter Habermeyer, Sven Lichtenberg
Bipolar dislocation of the clavicle is rare. In the literature, every reported bipolar dislocation of the clavicle is caused by a traumatic injury with loss of function of the affected shoulder. Currently, there is no recommendation to treat. A conservative treatment can be tried first to achieve adequate shoulder function. If this cannot be achieved, surgical treatment will be indicated. In the literature, many options for surgical treatment are described. This article presents a case of a chronic Rockwood V injury with chronic anterior sternoclavicular joint instability...
July 24, 2017: Der Unfallchirurg
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