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Glenohumeral joint instability

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https://www.readbyqxmd.com/read/30308434/modeling-a-rotator-cuff-tear-individualized-shoulder-muscle-forces-influence-glenohumeral-joint-contact-force-predictions
#1
Meghan E Vidt, Anthony C Santago, Anthony P Marsh, Eric J Hegedus, Christopher J Tuohy, Gary G Poehling, Michael T Freehill, Michael E Miller, Katherine R Saul
BACKGROUND: Rotator cuff tears in older individuals may result in decreased muscle forces and changes to force distribution across the glenohumeral joint. Reduced muscle forces may impact functional task performance, altering glenohumeral joint contact forces, potentially contributing to instability or joint damage risk. Our objective was to evaluate the influence of rotator cuff muscle force distribution on glenohumeral joint contact force during functional pull and axilla wash tasks using individualized computational models...
October 4, 2018: Clinical Biomechanics
https://www.readbyqxmd.com/read/30278009/glenohumeral-dislocation-arthropathy-etiology-diagnosis-and-management
#2
Peter S Vezeridis, Chad R Ishmael, Kristofer J Jones, Frank A Petrigliano
Dislocation arthropathy describes the development of progressive degenerative changes of the glenohumeral joint in the setting of instability. Although the specific etiology remains unclear, the trauma of a single dislocation, repetitive injury associated with recurrent dislocations, changes in shoulder biomechanics, and complications associated with instability surgery have all been implicated in its development. Pain and restricted range of motion are the most common patient complaints. Conservative management, consisting of pain control, activity modification, and physical therapy, is the first-line treatment after the development of arthropathy...
October 1, 2018: Journal of the American Academy of Orthopaedic Surgeons
https://www.readbyqxmd.com/read/30173797/editorial-commentary-science-bearing-fruit-can-the-inverted-pear-be-quantified
#3
EDITORIAL
Mark J Lemos
It has been reported and verified that anterior glenoid bone loss can lead to increased instability of the glenohumeral joint. Many authors have tried to quantify glenoid bone loss in recurrent instability of the glenohumeral joint. Techniques have included radiographic, magnetic resonance imaging, computed tomography (CT), 3-dimensional CT, and arthroscopic visualization. A 3-dimensional CT scan using the perfect circle technique, the Pico technique, has become a technique of choice for many authors. However, some have applied this technique using only the uninvolved shoulder...
September 2018: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/30115059/the-epidemiology-of-mri-detected-shoulder-injuries-in-athletes-participating-in-the-rio-de-janeiro-2016-summer-olympics
#4
Akira M Murakami, Andrew J Kompel, Lars Engebretsen, Xinning Li, Bruce B Forster, Michel D Crema, Daichi Hayashi, Mohamed Jarraya, Frank W Roemer, Ali Guermazi
BACKGROUND: To use Magnetic Resonance Imaging (MRI) to characterize the severity, location, prevalence, and demographics of shoulder injuries in athletes at the Rio de Janeiro 2016 Summer Olympic Games. METHODS: This was a retrospective analysis of all routine shoulder MRIs obtained from the Olympic Village Polyclinic during the Rio 2016 Summer Olympics. Imaging was performed on 1.5 T and 3 T MRI, and interpretation was centrally performed by a board-certified musculoskeletal radiologist...
August 17, 2018: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/30105260/age-related-changes-of-elastic-fibers-in-shoulder-capsule-of-patients-with-glenohumeral-instability-a-pilot-study
#5
A Castagna, E Cesari, A Gigante, B Di Matteo, R Garofalo, G Porcellini
Background: Recurrent shoulder dislocations occur much more frequently in adolescents than in the older population but a clear explanation of this incidence does not exist. The aim of the present study was to define the age-related distribution of the elastic fibers (EFs) in the shoulder capsule's extracellular matrix as a factor influencing shoulder instability. Materials and Methods: Biopsy specimens were obtained from the shoulder capsule of patients divided preoperatively into three groups: Group 1 consisted of 10 male patients undergoing surgery for unidirectional traumatic anterior instability (TUBS); Group 2 consisted of 10 male patients undergoing surgery for multidirectional instability (MDI); Group 3 represents the control, including 10 patients with no history of instability...
2018: BioMed Research International
https://www.readbyqxmd.com/read/30091179/feasibility-and-safety-of-arthroscopic-medial-glenohumeral-ligament-and-subscapularis-tendon-repair-with-knotless-anchors-a-cadaveric-study-in-dogs
#6
Alexandra Penelas, Andreas Gutbrod, Karolin Kühn, Antonio Pozzi
OBJECTIVE: To test the feasibility and safety of an arthroscopic imbrication of the medial glenohumeral ligament (MGHL) and the subscapularis tendon with knotless anchors in dogs. STUDY DESIGN: Cadaveric study. SAMPLE POPULATION: Ten limbs. METHODS: Cranial and caudal arms of the MGHL were imbricated with a 2.9- or a 2.4-mm knotless anchor. A horizontal mattress suture secured with a 3.5-mm knotless anchor was used to imbricate the subscapularis tendon...
August 2018: Veterinary Surgery: VS
https://www.readbyqxmd.com/read/30090835/comparison-of-a-distal-tibial-allograft-and-scapular-spinal-autograft-for-posterior-shoulder-instability-with-glenoid-bone-loss
#7
Christopher Nacca, Joseph A Gil, Steven F DeFroda, Rohit Badida, Brett D Owens
Background: Posterior glenoid bone deficiency can occur with recurrent glenohumeral instability. Glenoid reconstruction with a distal tibial allograft (DTA) has been reported to successfully restore contact pressures that occur during posterior glenohumeral translation. However, there are concerns regarding the risk of allograft resorption, availability, and costs. Extracapsular reconstruction using a scapular spinal autograft (SSA) has been reported as an alternative technique secondary to its anatomic location relative to the posterior shoulder and preferable autograft properties...
July 2018: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/30059443/traumatic-anterior-instability-treatment-options-for-initial-instability
#8
REVIEW
Jeffrey R Dugas, Matthew W Crozier
Because of the lack of bony restraints and minimal articular contact, the glenohumeral joint can attain significant range of motion; however, this results in the propensity for instability. The most generic form of instability, traumatic anterior instability, reliably produces a series of pathoanatomic findings. While reliable, these findings contribute to the complexities of caring for patients after an initial instability event. Numerous studies have examined this issue and determined that careful consideration of patient factors can guide successful treatment, whether it be surgical or nonsurgical, after initial instability...
September 2018: Sports Medicine and Arthroscopy Review
https://www.readbyqxmd.com/read/30025379/scapular-muscles-weakness-in-subjects-with-traumatic-anterior-glenohumeral-instability
#9
Walter Ansanello Netto, Gisele Garcia Zanca, Michele Forgiarini Saccol, Salomão Chade Assan Zatiti, Stela Márcia Mattiello
OBJECTIVE: To investigate possible alterations on scapular muscle strength in subjects with traumatic anterior glenohumeral instability. DESIGN: Cross-sectional study. SETTING: Laboratory setting. PARTICIPANTS: Fifty-two subjects of both sexes: 26 healthy and 26 with traumatic anterior glenohumeral instability. MAIN OUTCOME MEASURES: Subjects performed maximal isometric and concentric isokinetic contractions of shoulder protraction and retraction in scapular and sagittal planes, at slow (12...
September 2018: Physical Therapy in Sport
https://www.readbyqxmd.com/read/29985051/the-incidence-of-glenohumeral-bone-and-cartilage-lesions-at-the-time-of-anterior-shoulder-stabilization-surgery-a-comparison-of-patients-undergoing-primary-and-revision-surgery
#10
Kyle R Duchman, Carolyn M Hettrich, Natalie A Glass, Robert W Westermann, Brian R Wolf, Keith Baumgarten, Julie Bishop, Jonathan Bravman, Robert Brophy, James Carpenter, Grant Jones, John Kuhn, C Benjamin Ma, Robert Marx, Eric McCarty, Bruce Miller, Matthew Smith, McCarty Eric, Bruce Miller, Matthew Smith, Rick Wright, Alan Zhang
BACKGROUND: Intra-articular glenohumeral joint changes frequently occur after shoulder instability events. PURPOSE: (1) To compare demographic characteristics, baseline patient-reported outcomes, and intraoperative findings for patients undergoing primary or revision shoulder stabilization surgery and (2) to determine the incidence of glenohumeral bone and cartilage lesions in this population while identifying factors independently associated with these lesions...
August 2018: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29881921/anatomic-analysis-of-the-whole-articular-capsule-of-the-shoulder-joint-with-reference-to-the-capsular-attachment-and-thickness
#11
Daisuke Momma, Akimoto Nimura, Satoru Muro, Hitomi Fujishiro, Takashi Miyamoto, Tadanao Funakoshi, Tomoyuki Mochizuki, Norimasa Iwasaki, Keiichi Akita
BACKGROUND: Although conventional Bankart repair has been the accepted procedure for traumatic anterior glenohumeral instability, the humeral avulsion of the glenohumeral ligament or an elongation of the capsule remains challenging to decide the appropriate treatment. The anatomical knowledge regarding the whole capsule of glenohumeral joint is necessary to accurately treat for the capsular disorders. The aims of the current study were to investigate the anatomical features of capsular attachment and thickness in a whole capsule of glenohumeral joint...
June 7, 2018: Journal of Experimental Orthopaedics
https://www.readbyqxmd.com/read/29851867/what-are-the-effects-of-capsular-plication-on-translational-laxity-of-the-glenohumeral-joint-a-study-in-cadaveric-shoulders
#12
Stephanie W Mayer, Andrew P Kraszewski, Anne Skelton, Andreas Kontaxis, Russell Warren
BACKGROUND: Surgical treatment for shoulder instability generally involves labral repair with a capsular plication or imbrication. Good results are reported in both open and arthroscopic procedures, but there is no consensus on the amount or location of capsular plication that is needed to achieve stability and anatomic anterior, posterior, and inferior translation of the joint. QUESTIONS/PURPOSES: (1) What are the separate and combined effects of increasing plication magnitude and sequential additive plications in the anterior, posterior, and inferior locations of the joint capsule on glenohumeral joint translation in the anterior, posterior, and inferior directions? (2) What plication location and magnitude restores anterior, posterior, and inferior translation to a baseline level? METHODS: Fourteen cadaveric shoulders were dissected down to the glenohumeral capsule and underwent instrumented biomechanical testing...
July 2018: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/29781910/superior-baseplate-inclination-is-associated-with-instability-after-reverse-total-shoulder-arthroplasty
#13
Robert Z Tashjian, Brook I Martin, Cassandra A Ricketts, Heath B Henninger, Erin K Granger, Peter N Chalmers
BACKGROUND: Instability is the most common complication after reverse total shoulder arthroplasty (rTSA). In the native glenohumeral joint, in addition to full dislocations, more subtle forms of instability exist. However, the incidence of more subtle forms of instability, the factors associated with instability, and the effect of instability on validated outcome scores after rTSA remain poorly understood. QUESTIONS/PURPOSES: (1) After rTSA, what is the risk of instability, including more subtle forms of subjective instability? (2) What are the factors associated with instability? (3) Are more subtle forms of instability associated with lower American Shoulder and Elbow Surgeons (ASES) functional outcome scores than those patients without instability? METHODS: A total of 168 rTSAs were performed during the study period...
August 2018: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/29770343/does-the-beighton-score-correlate-with-specific-measures-of-shoulder-joint-laxity
#14
Noah A Whitehead, Khalid D Mohammed, Mark L Fulcher
Background: Evaluation of shoulder joint laxity is an important component of the shoulder examination, especially in the setting of shoulder instability. Measures of generalized joint laxity, particularly the Beighton score, are often recorded and used to help make management decisions in these cases. However, no evidence is available to show that the Beighton score corresponds to specific measures of shoulder joint laxity. Purpose: To assess the correlation between the Beighton score and validated measures of shoulder joint laxity...
May 2018: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/29697499/management-of-articular-cartilage-defects-in-the-glenohumeral-joint
#15
Adam J Seidl, Matthew J Kraeutler
Articular cartilage defects are not often encountered in the glenohumeral joint. These lesions are typically found in patients with shoulder trauma, recurrent instability, or previous surgical treatment. Diagnosis can be difficult; these defects are often found incidentally during arthroscopic or open surgical management of other pathology. Initial management of isolated glenohumeral chondral defects is nonsurgical and includes physical therapy and/or corticosteroid injections. If nonsurgical treatment is unsuccessful, patients may undergo surgery...
June 1, 2018: Journal of the American Academy of Orthopaedic Surgeons
https://www.readbyqxmd.com/read/29659379/bony-reconstruction-of-the-anterior-glenoid-rim
#16
Laurent B Willemot, Bassem T Elhassan, Olivier Verborgt
Recurrent anterior shoulder instability is associated with glenohumeral bone loss. Glenoid deficiency compromises the concavity-compression mechanism. Medial Hill-Sachs lesions can result in an off-track humeral position. Anterior glenoid reconstruction or augmentation prevents recurrence by addressing the pathomechanics. In Bristow and Latarjet procedures, the coracoid process is harvested for conjoint tendon transfer, capsular reinforcement, and glenoid rim restoration. Complications and the nonanatomic nature of the procedure have spurred research on graft sources...
May 15, 2018: Journal of the American Academy of Orthopaedic Surgeons
https://www.readbyqxmd.com/read/29629579/anatomical-total-shoulder-arthroplasty-in-young-patients-with-osteoarthritis
#17
COMPARATIVE STUDY
M O Gauci, N Bonnevialle, G Moineau, M Baba, G Walch, P Boileau
Aims: Controversy about the use of an anatomical total shoulder arthroplasty (aTSA) in young arthritic patients relates to which is the ideal form of fixation for the glenoid component: cemented or cementless. This study aimed to evaluate implant survival of aTSA when used in patients aged < 60 years with primary glenohumeral osteoarthritis (OA), and to compare the survival of cemented all-polyethylene and cementless metal-backed glenoid components. Materials and Methods: A total of 69 consecutive aTSAs were performed in 67 patients aged < 60 years with primary glenohumeral OA...
April 1, 2018: Bone & Joint Journal
https://www.readbyqxmd.com/read/29589497/risk-factors-for-recurrent-instability-or-revision-surgery-following-arthroscopic-bankart-repair
#18
S A Mahure, B Mollon, B M Capogna, J D Zuckerman, Y W Kwon, A S Rokito
Aims: The factors that predispose to recurrent instability and revision stabilization procedures after arthroscopic Bankart repair for anterior glenohumeral instability remain unclear. We sought to determine the rate and risk factors associated with ongoing instability in patients undergoing arthroscopic Bankart repair for instability of the shoulder. Materials and Methods: We used the Statewide Planning and Research Cooperative System (SPARCS) database to identify patients with a diagnosis of anterior instability of the shoulder undergoing arthroscopic Bankart repair between 2003 and 2011...
March 1, 2018: Bone & Joint Journal
https://www.readbyqxmd.com/read/29567036/fibrocartilaginous-metaplasia-identified-in-the-long-head-of-the-biceps-brachii
#19
Carlo Bottegoni, Luca Farinelli, Alberto Aquili, Sandra Manzotti, Marco Baldini, Antonio Gigante
BACKGROUND: In the glenohumeral joint, the long head of biceps brachii (LHBB) is exposed to tension and compression loading. The short head of biceps brachii (SHBB) works only in tension. It is known that tendon under compression might develop fibrocartilaginous metaplasia that improves the resistance to compression but reduces the resistance to tension. This study evaluated the presence of cartilage in LHBB and SHBB samples, supporting its possible role in tendon tear. METHODS: Between 2014 and 2016, 13 samples of LHBB and SHBB were collected during surgery for shoulder instability, glenohumeral arthritis, and massive rotator cuff tears...
July 2018: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/29537865/critical-glenoid-bone-loss-in-posterior-shoulder-instability
#20
Christopher Nacca, Joseph A Gil, Rohit Badida, Joseph J Crisco, Brett D Owens
BACKGROUND: There is currently no consensus regarding the amount of posterior glenoid bone loss that is considered critical. Critical bone loss is defined as the amount of bone loss that occurs in which an isolated labral repair will not sufficiently restore stability. PURPOSE: The purpose is to identify the critical size of the posterior defect. STUDY DESIGN: Controlled laboratory study. METHODS: Eleven cadaveric shoulders were tested...
April 2018: American Journal of Sports Medicine
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