Background: The limits of the glenoid track have been defined through methods that do not take properly into account the physiological articular forces involved in the articular contact, which may interfere with its size. Finite elements numerical models can simulate joint forces more realistically.
Objective: To evaluate the glenoid track in a finite element numerical model of the shoulder.
Methods: We developed a finite element numerical model of the shoulder, based on imaging exams of a volunteer, including the proximal humerus, scapula, their respective articular cartilages, and the rotator cuff muscles. An algorithm to balance the weight of the arm calculated muscle, wrapping, and articular reaction forces. The model has freedom of translation in three axes. The articular contact characteristics and glenoid track's dimensions according to the literature references were evaluated in 60°, 90° and 120° of abduction, all at the 90° external rotation.
Results: The model's anatomy and physiology were validated. The value of the glenoid track (according to Yamamoto's parameters) was 86% of glenoid length at 90° abduction before loading of forces, and 79% afterwards. The glenoid track at 60°, 90° and 120° of abduction (Omori's parameters) corresponded, respectively, to 71%, 88% and 104% of glenoid length before loading of forces, and 76%, 84% and 103% afterward.
Conclusion: The numerical model is suitable for the shoulder articular contact evaluation. The articular contact analysis ratifies the glenoid track concept and contributes to its evolution. This value is influenced by glenohumeral joint forces, which should be considered for the analysis.
Level Of Evidence: Basic Science Study; Computer Modelling.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.otsr.2020.03.004 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Risk Factors for Recurrent Instability After Arthroscopic Bankart Repair in Pediatric and Adolescent Patients: A Systematic Review.
Am J Sports Med
January 2025
Harvard Medical School, Boston, Massachusetts, USA.
Background: While risk factors for recurrent instability (RI) after arthroscopic Bankart repair (ABR) for anterior glenohumeral instability (aGHI) have been well established in adult populations, there is much less evidence in pediatric and adolescent patients, despite being the most affected epidemiologic subpopulation.
Purpose: To identify the clinical, demographic, radiologic, and operative risk factors for RI after ABR for aGHI in pediatric and adolescent patients.
Study Design: Systematic review; Level of evidence, 4.
The Radiologic Evaluation and Clinical Significance of Glenohumeral Bone Loss in Anterior Shoulder Instability.
J Clin Med
December 2024
Northwell Health, New Hyde Park, NY 11040, USA.
Glenoid and humeral bone loss is associated with a high incidence of recurrent shoulder instability and failure of arthroscopic stabilization procedures. However, the radiographic evaluation of bony Bankart and Hill-Sachs injuries continues to pose a diagnostic challenge, and a universally accepted optimal method of measurement is lacking. The purpose of this review is to summarize the advantages and disadvantages of various techniques and imaging modalities available for measuring glenoid bone loss in shoulder instability, including conventional roentgenography, 2-dimensional and 3-dimensional computed tomography (CT), and magnetic resonance imaging (MRI).
View Article and Find Full Text PDFA Novel Proportional Method for the Simplified Assessment of Glenoid Bone Loss in Patients With Anterior Shoulder Instability.
Am J Sports Med
January 2025
Department of Orthopaedics, China-Japan Union Hospital of Jilin University, Changchun, China.
Article Synopsis
- Surgical planning for anterior shoulder instability (ASI) requires accurate glenoid bone defect measurements, but existing methods are often complicated or impractical.
- The study developed a new measurement technique using CT scans that simplifies the assessment of anterior glenoid bone defects while maintaining accuracy.
- Results indicated that the new proportional method produced similar measurements to other established methods, with a convenient calculation of glenoid width based on height, while the CT-specific formula showed significant deviations in defect size and ratio.
Mid- to Long-Term Clinical Outcomes and Failure Rates After ALPSA Lesion Repair.
Am J Sports Med
January 2025
Vanderbilt University Medical Center, Nashville, Tennessee, USA.
Background: Anterior labroligamentous periosteal sleeve avulsion (ALPSA) lesions are associated with recurrent shoulder instability and higher rates of failure after capsulolabral repair compared with similarly treated Bankart lesions. Although these lesions can portend poor outcomes, there are limited data on the associated conditions and postoperative course in a young, active population.
Purpose: To evaluate the mid- to long-term clinical course and failure rates after ALPSA repairs and assess features associated with these outcomes.
No Difference in Outcomes After Remplissage or Open Bankart Repair Plus Inferior Capsular Shift in Collision and Contact Athletes With Subcritical Glenoid Bone Loss ≤10% and Off-Track Hill-Sachs Lesion.
Arthroscopy
December 2024
Sanatorio Allende, Avenida Hipólito Irigoyen 384, Nueva Córdoba, Córdoba, Argentina.
Purpose: To compare functional outcomes, recurrence rate, range of motion (ROM), and return to sport between arthroscopic Bankart repair with remplissage (BR) and open Bankart repair with inferior capsular shift (OBICS) in contact and collision athletes with recurrent anterior shoulder instability.
Methods: A prospective comparative cohort study of 90 patients separated into 2 study groups (OBICS and BR) of 45 collision and contact athletes each was conducted. All athletes had subcritical glenoid bone loss ≤10% and off-track Hill-Sach lesions.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!