Blood supply and vascularity of the glenoid labrum: Its clinical implications (original) (raw)

Common animal models lack a distinct glenoid labrum: a comparative anatomy study

Journal of Experimental Orthopaedics

Purpose Development and validation of an animal model of labral healing would facilitate translation of novel surgical and biological strategies to improve glenolabral healing. The purpose of this study was to characterize the anatomic and histological properties of the shoulder labrum in rat, rabbit, dog, pig, goat, and humans. Given the demonstrated similarities in size and structural morphology in other joints, it was hypothesized that the goat glenoid with surrounding capsulolabral complex would most closely resemble that of humans in terms of dimensions and structure, as observed grossly and histologically. Methods Cadaveric glenohumeral joints from rats (n = 8), New Zealand white rabbits (n = 13), Mongrel dogs (n = 9), Spanish goats (n = 10), Yorkshire pigs (n = 10), and humans (n = 9) were freshly harvested. Photographs were taken of the glenoid with its surrounding capsulolabral complex. Linear dimensions of the glenoid articular surface were measured. It was determined wher...

The Impact of Glenoid Labrum Thickness and Modulus on Labrum and Glenohumeral Capsule Function

Journal of Biomechanical Engineering, 2010

The glenoid labrum is an integral component of the glenohumeral capsule’s insertion into the glenoid, and changes in labrum geometry and mechanical properties may lead to the development of glenohumeral joint pathology. The objective of this research was to determine the effect that changes in labrum thickness and modulus have on strains in the labrum and glenohumeral capsule during a simulated physical examination for anterior instability. A labrum was incorporated into a validated, subject-specific finite element model of the glenohumeral joint, and experimental kinematics were applied simulating application of an anterior load at 0 deg, 30 deg, and 60 deg of external rotation and 60 deg of glenohumeral abduction. The radial thickness of the labrum was varied to simulate thinning tissue, and the tensile modulus of the labrum was varied to simulate degenerating tissue. At 60 deg of external rotation, a thinning labrum increased the average and peak strains in the labrum, particular...

Anatomy of the glenohumeral ligaments

Italian journal of anatomy and embryology, 2018

For many years, there has been controversy regarding the presence of the glenohumeral ligaments; the aim of the present study was to evaluate the detailed anatomy of these ligaments. 140 shoulders were dissected and examined. The detailed anatomy of glenohumeral ligaments was recorded. Data were doubled-entered into the Statistical Package for Social Sciences version 21. Kruskal-Wallis and one way analysis for variance on ranks tests were used: statistical significance was set at p<0.05. The superior glenohumeral ligament was present in all specimens originating from the glenoid labrum anterosuperior aspect, inserting into the lesser tubercle (mean thickness 5.06 mm). The middle glenohumeral ligament was present in 98.57% of specimens arising from the glenoid labrum anterior aspect, inserting into the lesser tubercle (mean thickness 5.97 mm). The inferior glenohumeral ligament anterior band was present in all specimens arising from the glenoid labrum anteroinferior aspect, insert...