Effects of glenoid inclination and acromion index on humeral head translation and glenoid articular cartilage strain

Background Previous clinical studies have reported associations between glenoid inclination (GI), the acromion index (AI), and the critical shoulder angle (CSA) on the one hand and the occurrence of glenohumeral osteoarthritis and supraspinatus tendon tears on the other hand. The objective of this w...

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Bibliographic Details
Published in:Journal of shoulder and elbow surgery 2017, Vol.26 (1), p.157-164
Main Authors: Engelhardt, Christoph, PhD, Farron, Alain, MD, Becce, Fabio, MD, Place, Nicolas, PhD, Pioletti, Dominique P., PhD, Terrier, Alexandre, PhD
Format: Article
Language:English
Subjects:
acromion index
Adult
Aged
Aged, 80 and over
Biomechanical Phenomena
Body Weights and Measures
Cartilage, Articular
critical shoulder angle
Female
glenohumeral osteoarthritis
Glenoid inclination
Humans
Humeral Head
humeral head translation
Male
Middle Aged
musculoskeletal model
Orthopedics
Osteoarthritis - etiology
Patient-Specific Modeling
Range of Motion, Articular
Reference Values
Rotator Cuff Injuries - etiology
Scapula
Shoulder Joint - physiology
Stress, Mechanical
Young Adult
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Summary:Background Previous clinical studies have reported associations between glenoid inclination (GI), the acromion index (AI), and the critical shoulder angle (CSA) on the one hand and the occurrence of glenohumeral osteoarthritis and supraspinatus tendon tears on the other hand. The objective of this work was to analyze the correlations and relative importance of these different anatomic parameters. Methods Using a musculoskeletal shoulder model developed from magnetic resonance imaging scans of 1 healthy volunteer, we varied independently GI from 0° to 15° and AI from 0.5 to 0.8. The corresponding CSA varied from 20.9° to 44.1°. We then evaluated humeral head translation and critical strain volume in the glenoid articular cartilage at 60° of abduction in the scapular plane. These values were correlated with GI, AI, and CSA. Results Humeral head translation was positively correlated with GI ( R  = 0.828, P  
ISSN:1058-2746
1532-6500
DOI:10.1016/j.jse.2016.05.031