scholarly journals Subject-Specific Finite Element Modeling of the Human Shoulder Complex Part 2: Quantitative Evaluation of the Effect of Rotator Cuff Tear Propagation on Glenohumeral Joint Stability

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 34068-34077 ◽  
Author(s):  
Manxu Zheng ◽  
Zhihui Qian ◽  
Zhenmin Zou ◽  
Chris Peach ◽  
Lei Ren
Keyword(s):  
Finite Element ◽  
Rotator Cuff ◽  
Finite Element Modeling ◽  
Glenohumeral Joint ◽  
Joint Stability ◽  
Cuff Tear ◽  
Complex Part ◽  
Subject Specific ◽  
Shoulder Complex ◽  
Tear Propagation

Development of a Finite Element Model of the Inferior Glenohumeral Ligament of the Glenohumeral Joint

2003 ◽  
Author(s):  
William J. Newman ◽  
Richard E. Debski ◽  
Susan M. Moore ◽  
Jeffrey A. Weiss
Keyword(s):  
Finite Element ◽  
Glenohumeral Joint ◽  
External Rotation ◽  
Element Model ◽  
Fe Modeling ◽  
Glenohumeral Ligament ◽  
Subject Specific ◽  
Inferior Glenohumeral Ligament ◽  
Glenohumeral Capsule ◽  
Shoulder Stability

The shoulder is one of the most complex and often injured joints in the human body. The inferior glenohumeral ligament (IGHL), composed of the anterior band (AB), posterior band (PB) and the axillary pouch, has been shown to be an important contributor to anterior shoulder stability (Turkel, 1981). Injuries to the IGHL of the glenohumeral capsule are especially difficult to diagnose and treat effectively. The objective of this research was to develop a methodology for subject-specific finite element (FE) modeling of the ligamentous structures of the glenohumeral joint, specifically the IGHL, and to determine how changes in material properties affect predicted strains in the IGHL at 60° of external rotation. Using the techniques developed in this research, an improved understanding of the contribution of the IGHL to shoulder stability can be acquired.

scholarly journals Impact of symptom bilaterality and hand dominance on patient-reported disability outcomes

2018 ◽  
Vol 6 ◽  
pp. 205031211879756
Author(s):  
Helen Razmjou ◽  
Tim Dwyer ◽  
Richard Holtby
Keyword(s):  
Risk Factors ◽  
Rotator Cuff ◽  
Outcome Measures ◽  
Rotator Cuff Tear ◽  
Glenohumeral Joint ◽  
Impingement Syndrome ◽  
Older Age ◽  
Hand Dominance ◽  
Cuff Tear ◽  
Dominant Side

Objectives: It is not clear if using patients with bilateral symptoms would impact the level of disability reported in orthopaedic research. The purposes of this study were to (1) examine the prevalence of bilateral shoulder symptoms (significant pain, stiffness or weakness affecting function) in patients with rotator cuff impingement syndrome, rotator cuff tear and osteoarthritis of the glenohumeral joint, (2) explore risk factors associated with bilateral shoulder symptoms, and (3) examine the impact of symptom bilaterality and hand dominance on pre- and post-operative patient-oriented disability outcomes. Methods: This study involved secondary analysis of prospectively collected data of patients who had undergone shoulder surgery and had returned for their 1-year follow-up. Two outcome measures were collected prior to surgery and at 1-year following surgery: the American Shoulder and Elbow Surgeons and the Constant–Murley Score. Results: Data of 772 patients, 376 (49%) females, 396 males (51%); 288 (impingement syndrome), 332 (rotator cuff tear), and 152 (osteoarthritis) were included in the analysis. There was a statistically significant difference in the prevalence of bilateral symptoms being 44%, 28%, and 22% in the osteoarthritis, impingement syndrome, and rotator cuff tear groups, respectively (p < 0.0001). The prevalence of dominant side involvement was 71%, 67%, and 53% in the rotator cuff tear, impingement syndrome, and osteoarthritis groups (p < 0.0001). Older age and female sex were risk factors for development of bilateral symptoms only in patients with rotator cuff tear. Neither symptom bilaterality nor dominant arm involvement had a negative impact on patient-oriented disability outcome measures prior to or after surgery (p > 0.05). Conclusion: This study shows that patients with osteoarthritis of the glenohumeral joint have the highest prevalence of bilateral shoulder complaints. The older age and the female sex increased the risk of having bilateral symptoms in patients with rotator cuff tear. Having bilateral shoulder symptoms or dominant side involvement was not associated with higher level of disability prior or after surgery.

scholarly journals Anatomy and Biomechanic of the Shoulder

2019 ◽  
Vol 7 (11_suppl6) ◽  
pp. 2325967119S0046
Author(s):  
Troydimas Panjaitan
Keyword(s):  
Rotator Cuff ◽  
Humeral Head ◽  
Glenohumeral Joint ◽  
External Rotation ◽  
Central Component ◽  
Subscapularis Tendon ◽  
Glenoid Fossa ◽  
Greater Tuberosity ◽  
Glenohumeral Ligaments ◽  
Shoulder Complex

The shoulder is one of the most complex joints of the human body. Consequently, they are susceptible to injury and degeneration. Mechanical shoulder pathology typically results when overuse, extremes of motion, or excessive forces overwhelm intrinsic material properties of the shoulder complex resulting in tears of the rotator cuff, capsule, and labrum. The fundamental central component of the shoulder complex is the glenohumeral joint. It has a ball-and-socket configuration with a surface area ratio of the humeral head to glenoid fossa of about 3:1 with an appearance similar to a golf ball on a tee. Overall, there is minimal bony covering and limited contact areas that allow extensive translational and rotational ability in all three planes. The glenohumeral joint has 2 groups of stabilizers, which are static (passive) and dynamic (active) restrains. Static stabilizers include the concavity of the glenoid fossa, glenoid fossa retroversion and superior angulation, glenoid labrum, the joint capsule, and glenohumeral ligaments, and a vacuum effect from negative intra-articular pressure. Dynamic stabilization is merely the coordinated contraction of the rotator cuff muscles that create forces that compress the articular surfaces of the humeral head into the concave surface of the glenoid fossa. During upper extremity movement, the effects of static stabilizers are minimized and dynamic or active stabilizers become the dominant forces responsible for glenohumeral stability The simple act of arm elevation is a complex task that occurs via the combination of glenohumeral and scapulothoracic motion, together known as scapulohumeral rhythm. In the first 1200, glenohumeral arm abduction, the supraspinatus and deltoid work together and create a force couple that promotes stability, while raising the arm (deltoid contraction). In addition, the humerus must undergo 450 external rotation to not only clear the greater tuberosity posteriorly but also loosen the inferior glenohumeral ligament (IGHL) to allow maximum elevation. There are several anatomical updates regarding the rotator cuff and capsular footprint. The footprint of the supraspinatus on the greater tuberosity is much smaller than previously believed, and this area of the greater tuberosity is actually occupied by a substantial amount of the infraspinatus. The superior-most insertion of the subscapularis tendon extends a thin tendinous slip, which attaches to the fovea capitis of the humerus. The teres minor muscle inserts to the lowest impression of the greater tuberosity of the humerus and additionally inserts to the posterior side of the surgical neck of the humerus.

scholarly journals Could superior capsule findings be used as a predictor for partial bursal-sided rotator cuff tears?

2020 ◽  
Vol 28 (1) ◽  
pp. 230949901989515 ◽  
Author(s):  
Ulunay Kanatlı ◽  
Tacettin Ayanoglu ◽  
Erdinc Esen ◽  
Baybars Ataoglu ◽  
Mustafa Ozer ◽  
...  
Keyword(s):  
Rotator Cuff ◽  
Glenohumeral Joint ◽  
Arthroscopic Treatment ◽  
Rotator Cuff Tears ◽  
Subacromial Impingement Syndrome ◽  
Control Group ◽  
Study Group ◽  
Coracoacromial Ligament ◽  
Cuff Tear ◽  
Significant Difference

Purpose: The purpose of this study was to investigate the relationship between the superior capsule tear patterns and synovitis with subacromial pathologies, such as bursal-sided rotator cuff tear and subacromial impingement syndrome. Methods: Fifty patients who underwent arthroscopic treatment for isolated bursal-sided tear were included in the study. Fifty more patients who underwent arthroscopic treatment for isolated Superior Labrum Anterior Posterior (SLAP) 2 lesion without pathology in the rotator cuff were included in the control group. Firstly, superior capsule tear and common synovitis on the rotator cable were assessed during glenohumeral joint examination. Coracoacromial Ligament (CAL) degeneration grading was performed according to the Royal Berkshire Hospital classification. Bursal-sided partial tear grading was done using Ellman classification. Whether or not there was a relationship between synovitis, classic capsule tear, plus reverse flap capsule tear, and partial bursal-sided tear existence. Results: There were 21 patients with reverse flap capsule tear in the study group and 3 patients in the control group. In addition, there were 13 patients with synovitis in the study group and 4 in the control group. Compared to the control group, there was also a significant positive correlation in the presence of both synovitis and reverse flap capsule tear with the presence of bursal-sided tear in the study group ( p = 0.000). There was, however, no significant difference between the presence of classical capsule tear and the presence of bursal-sided tear ( p = 0.485). Conclusion: This study shows that the presence of reverse flap capsule tear and synovitis was associated with partial bursal-sided tears. Therefore, if the reverse flap capsule tear or synovitis is detected in the superior capsule, the rotator cuff should be evaluated in more detail during subacromial bursoscopy in order not to miss a bursal-sided partial cuff tear.

Lipoma Arborescens of the Subdeltoid Bursa Associated With Rotator Cuff Tear: A Case Report

2020 ◽  
Vol 36 (4) ◽  
pp. 353-356
Author(s):  
Kenji Kawashima ◽  
Nobuo Terabayashi ◽  
Hiromi Asano ◽  
Haruhiko Akiyama
Keyword(s):  
Rotator Cuff ◽  
Rotator Cuff Tear ◽  
Synovial Membrane ◽  
Glenohumeral Joint ◽  
Imaging Modality ◽  
Fluid Collection ◽  
Left Shoulder ◽  
Lipoma Arborescens ◽  
Cuff Tear ◽  
Line Imaging

Lipoma arborescens is a rare synovial lesion characterized by villous proliferation of the synovial membrane and replacement of subsynovial tissue with mature fat cells. The knee joint is the most frequently affected site, particularly in the suprapatellar pouch. However, there have been few reports regarding shoulder involvement, including the glenohumeral joint and subacromial subdeltoid bursa, associated with rotator cuff tear. This article reviews the case of a 67-year-old man who presented with lipoma arborescens of the left shoulder, associated with a rotator cuff tear. Sonography revealed a fluid collection with thickening of the synovial membrane with hyperechoic villous proliferation, located in the subdeltoid bursa. An arthroscopic synovectomy and rotator cuff repair were performed. Arthroscopic findings included yellow frond-like synovial proliferation of the synovium. Postoperatively, the patient was asymptomatic, and the lesion did not recur. Although magnetic resonance imaging is the first-line imaging modality for diagnosis of this lesion, sonography may be used initially for evaluation of chronic joint swelling. In addition, it can be useful for detection of recurrence after synovectomy. This case illustrates the typical sonographic features of lipoma arborescens.

Glenohumeral joint loading is impacted by rotator cuff tear severity during functional task performance

2021 ◽  
pp. 105494
Author(s):  
Joshua Pataky ◽  
Vijitha Seelam ◽  
Lyndsay Engle ◽  
Sujata Khandare ◽  
April D. Armstrong ◽  
...  
Keyword(s):  
Rotator Cuff ◽  
Task Performance ◽  
Rotator Cuff Tear ◽  
Glenohumeral Joint ◽  
Joint Loading ◽  
Cuff Tear ◽  
Functional Task
Sign in / Sign up

Export Citation Format

Share Document