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shoulder stability

Marcio Jose Dos Santos, Renato Claudino, Giovana Zarpellon Mazzo
The goal of this study was to investigate the timing of compensatory postural adjustments (CPAs) in older adults during body perturbations in the mediolateral direction, circumstances that increase their risk of falls. The latencies of leg and trunk muscle activation to body perturbations at the shoulder level and variables of center of pressure (COP) excursion, which characterize postural stability, were analyzed in 40 older adults (non-fallers and fallers evenly split) and in 20 young participants. The older adults exhibited longer latencies of muscular activation in 8 out of 15 postural muscles as compared to young participants; for three muscles, the latencies were longer for the older fallers than non-fallers...
October 21, 2016: Motor Control
Emily Dalton, Natasha A Lannin, Kate Laver, Leo Ross, Stephen Ashford, Annie McCluskey, Anne Cusick
PURPOSE: The Disabilities of Arm, Shoulder and Hand (DASH) questionnaire is a patient reported outcome measure for evaluating upper limb function in people with musculoskeletal conditions. While the DASH has good psychometric properties when used with people with musculoskeletal conditions, it has not been tested with adults after stroke. METHODS: Data for n = 61 adults following stroke (aged 32-93 years, 44% male) were analyzed to test validity and reliability of the DASH for use with a stroke population...
October 21, 2016: Disability and Rehabilitation
Sebastian Stefanski, Börje Svensson, Andreas Thor
PURPOSE: Various augmentation procedures involving the maxillary sinus, using bone substitutes or bone, have been used to enhance bone support for dental implants. The aim of this study was to retrospectively evaluate the status of implants in patients who had undergone a maxillary sinus lift and immediate implant placement without the addition of graft material. MATERIALS AND METHODS: Nineteen patients who had required bone augmentation of their maxillary sinus floor were evaluated in this study...
October 20, 2016: Clinical Oral Implants Research
Beigang Fu
OBJECTIVES: The aim of this study was to evaluate clinical results of a new design titanium elastic nail (TEN) for displaced midshaft clavicular fractures. PATIENTS AND METHODS: Between February 2012 and December 2013, a total 36 patients with displaced midshaft clavicular fractures were treated with intramedullary nailing stabilization with our new design TEN. Blood loss, mean times of operation, postoperative complications, hospital stays and time to bone union was recorded...
October 15, 2016: Acta Orthopaedica et Traumatologica Turcica
Mona Alilet, Julien Behr, Jean-Philippe Nueffer, Benoit Barbier-Brion, Sébastien Aubry
: The subscapularis (SSC) muscle is the most powerful of the rotator cuff muscles, and plays an important role in shoulder motion and stabilization. SSC tendon tear is quite uncommon, compared to the supraspinatus (SSP) tendon, and, most of the time, part of a large rupture of the rotator cuff. Various complementary imaging techniques can be used to obtain an accurate diagnosis of SSC tendon lesions, as well as their extension and muscular impact. Pre-operative diagnosis by imaging is a key issue, since a lesion of the SSC tendon impacts on treatment, surgical approach, and post-operative functional prognosis of rotator cuff injuries...
October 17, 2016: Insights Into Imaging
Loukas Koyonos, Matthew J Kraeutler, Daniel F O'Brien, Michael G Ciccotti, Christopher C Dodson
OBJECTIVES: Generalized joint laxity has been proposed as a significant risk factor for failure after arthroscopic anterior shoulder stabilization. The purpose of this study was to prospectively measure joint mobility in patients undergoing arthroscopic anterior shoulder stabilization and to determine whether hypermobility is a risk factor for worse outcomes compared with patients having normal joint mobility. METHODS: Patients with anterior shoulder instability were prospectively enrolled...
October 13, 2016: Physician and Sportsmedicine
Xinning Li, Antonio Cusano, Josef Eichinger
Shoulder dislocations are a common injury, with anterior shoulder dislocation among male patients being the most common presentation. A patient with recurrent shoulder instability, anterior-superior escape, and chronic subscapularis tendon rupture following multiple shoulder stabilization surgeries presents the surgeon with a complex and challenging case. This report describes a 40-year-old man with an extensive left shoulder history that included a failed Latarjet procedure, an irreparable, chronic subscapularis tear with grade 4 Goutallier fatty infiltration, and associated anterior-superior escape...
October 13, 2016: Orthopedics
Rachel M Frank, Anthony A Romeo, Matthew T Provencher
Anterior glenoid bone loss is present in nearly all cases of recurrent anterior glenohumeral instability. Treating glenoid bone loss in the setting of recurrent instability is challenging, and often, soft tissue stabilization procedures in isolation are inadequate. The nonanatomic, incongruous joint resulting from most bony augmentation procedures has motivated investigators to find an alternative solution. Recently, the use of fresh distal tibia allograft has been reported as an anatomic, osteoarticular reconstructive option for restoring the glenoid arc and maintaining glenohumeral congruency...
October 13, 2016: Orthopedics
Vinícius Yan Santos Nacimento, Rafaela Joyce Barbosa Torres, Natália Barros Beltrão, Priscila Soares Dos Santos, André Luiz Torres Pirauá, Valéria Mayaly Alves de Oliveira, Ana Carolina Rodarti Pitangui, Rodrigo Cappato de Araújo
This study evaluated the effects of instability on the EMG activity of scapular stabilizing and upper limb muscles during exercises with axial and rotational load. 20 male volunteers (20.9 ± 1.8 years, 174.1 ± 0.04 cm, 73.17 ± 8.77 kg) experienced in strength training participated in a crossover design. Muscle activation of anterior deltoid (AD), posterior deltoid (PD), pectoralis major (PM), biceps brachii (BB), triceps brachii (TB), upper trapezius (UT), middle trapezius (MT), lower trapezius (LT) and serratus anterior (SA) were determined on both conditions...
October 13, 2016: Journal of Applied Biomechanics
L Ernstbrunner, J-D Werthel, T Hatta, A R Thoreson, H Resch, K-N An, P Moroder
OBJECTIVES: The bony shoulder stability ratio (BSSR) allows for quantification of the bony stabilisers in vivo. We aimed to biomechanically validate the BSSR, determine whether joint incongruence affects the stability ratio (SR) of a shoulder model, and determine the correct parameters (glenoid concavity versus humeral head radius) for calculation of the BSSR in vivo. METHODS: Four polyethylene balls (radii: 19.1 mm to 38.1 mm) were used to mould four fitting sockets in four different depths (3...
October 2016: Bone & Joint Research
Ran Schwarzkopf, Erik Schnaser, Taiki Nozaki, Yasuhito Kaneko, Michael J Gillman
INTRODUCTION: Patient-specific implants and instruments (PSI) have been used in both knee and shoulder replacements due to the perceived benefits of improved surgical accuracy and efficiency. The proposed benefits of using a PSI in total hip arthroplasty (THA) are numerous and include reduction of operative time and improved mechanical and anatomical alignment leading to increased implant longevity, increased stability, and clinical outcomes. We describe a novel patient-specific instrumentation and a surgical method that may improve directed resection of acetabular bone and accurate cup placement during THA...
October 6, 2016: Surgical Technology International
J Christoph Katthagen, Dimitri S Tahal, Scott R Montgomery, Marilee P Horan, Peter J Millett
PURPOSE: To compare glenoid retroversion and functional outcomes between patients with traumatic onset of posterior shoulder instability (PSI) and patients with atraumatic onset of PSI. METHODS: Patients with PSI who underwent arthroscopic posterior capsulolabral anchor repair, were active in sports, and had undergone surgery a minimum of 2 years earlier were included. Traumatic onset was defined as PSI that occurred after a trauma with the shoulder in adduction, flexion, and internal rotation in patients with no history of instability...
October 4, 2016: Arthroscopy: the Journal of Arthroscopic & related Surgery
Chad M Fortun, Ivan Wong, Joseph P Burns
Failed arthroscopic soft-tissue stabilization and anterior glenoid bone loss have been shown to have high failure rates after standard arthroscopic stabilization techniques. For patients with recurrent glenohumeral instability, the Bristow-Latarjet procedure is currently the standard of care. It is predominantly performed through an open deltopectoral approach but has recently been described arthroscopically. Although providing excellent clinical outcomes, the Bristow-Latarjet procedure violates the subscapularis muscle, has a steep learning curve with a high complication rate, and permanently changes the anterior shoulder anatomy, making any future revision surgery more challenging...
August 2016: Arthroscopy Techniques
Justin A Ly, Erin M Coleman, Eric J Kropf
The treatment of anterior shoulder instability is well described with various techniques, including arthroscopic double-row repair, an alternative to open stabilization procedures in high-risk groups. The surgical management of posterior instability in high-risk and athletic populations is a less-explored entity. We describe our technique for an all arthroscopic double-row suture anchor repair of a large posterior bony Bankart lesion. We prefer this technique over percutaneous cannulated screw fixation because the double-row suture technique allows for incorporation of capsular plication with bony fixation in an effort to better restore normal anatomy for capsulolabral complex...
August 2016: Arthroscopy Techniques
Nata Parnes, Maryellen Blevins, Brian Carr, Paul Carey
Inferior labrum anterior to posterior lesions as an isolated injury or as part of an extensive traumatic labral tear are uncommon and may present as multidirectional instability of the shoulder. These lesions are hard to visualize radiographically and many times are diagnosed only during surgery. Arthroscopic repair of these lesions requires advanced arthroscopic skills and is required for restoration of glenohumeral stability. We report a combined double-pulley simple knot technique that anatomically reconstructs the inferior labrum while overcoming the typical technical challenges, providing a large footprint for healing along the inferior glenoid rim and minimizing the amount of suture material in direct contact with the articular cartilage and the risk of knot migration...
August 2016: Arthroscopy Techniques
Won-Taek Oh, Yun-Rak Choi, Ho-Jung Kang, Il-Hyun Koh, Kyung-Han Lim
PURPOSE: To compare union rates and clinical and radiological outcomes of arthroscopic-assisted reduction and fixation with those of open reduction and fixation in patients with trans-scaphoid perilunate fracture dislocations. METHODS: This retrospective study included consecutive patients with trans-scaphoid PLFDs who underwent arthroscopic-assisted reduction and fixation (group A) or open reduction and fixation (group O), and who were followed up for a minimum of 2 years between May 2005 and March 2013...
October 1, 2016: Arthroscopy: the Journal of Arthroscopic & related Surgery
Ivan J Antosh, John M Tokish, Brett D Owens
CONTEXT: Posterior shoulder instability has become more frequently recognized and treated as a unique subset of shoulder instability, especially in the military. Posterior shoulder pathology may be more difficult to accurately diagnose than its anterior counterpart, and commonly, patients present with complaints of pain rather than instability. "Posterior instability" may encompass both dislocation and subluxation, and the most common presentation is recurrent posterior subluxation. Arthroscopic and open treatment techniques have improved as understanding of posterior shoulder instability has evolved...
October 3, 2016: Sports Health
G Nourissat, L Neyton, P Metais, P Clavert, B Villain, D Haeni, G Walch, L Lafosse
INTRODUCTION: The Latarjet procedure provides effective stabilization of chronically unstable shoulders. Since this procedure is mainly performed in a young athletic population, the functional impact is significant. Published data does not shed light on the time needed to recover work-related or sports-related function. Performing this procedure arthroscopically may improve functional recovery. This led us to carry out a prospective, multicenter study to compare the functional recovery after arthroscopic versus open Latarjet procedure...
September 27, 2016: Orthopaedics & Traumatology, Surgery & Research: OTSR
E Van Hoecke, A Van De Vijver, F Van Glabbeek, J Gielen
Radial head fractures are common injuries, occurring mostly in active young people 85%. Treatment of the more complex radial head fractures (Mason type III and IV), appear to be challenging and remain a subject of controversy. Replacement of the radial head with a metal prosthesis imitates the stabilizing role of the radial head and has been considered as the treatment of choice. However, long-term results are scarce. We report our mid to long-term (mean 9.4 year) clinical and radiographic results after insertion of a Judet Bipolar Radial Head prosthesis...
August 2016: Acta Orthopaedica Belgica
Maryne Cozette, Stéphane Delanaud, Pierre-Marie Lepretre, Thierry Weissland
OBJECTIVE: Shoulder internal (IR) and external rotator (ER) muscles play an important role in the stability of glenohumeral joint. The ratio between the peak torque of ER and IR in concentric (ER/IRPT) and mixed (ER-ECC/IR-CONPT) are usually measured to evaluate the effects of muscle weakness, sport activities, injury and treatment (Greenfield et al., 1990; Scoville et al., 1997). However, ER/IRPT and ER-ECC/IR-CONPT failed to provide some indication on the evolution of the ER/IR torque ratio (ER/IRTorque) and mixed torque ratio (ER-EC/IR-COTorque) during the range of motion (ROM)...
September 2016: Annals of Physical and Rehabilitation Medicine
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