Original articleQuantification of a glenoid defect with three-dimensional computed tomography and magnetic resonance imaging: A cadaveric study
Section snippets
Materials and methods
This study used 8 formaldehyde-preserved scapulae and 6 fresh-frozen scapulae from skeletally mature individuals. Scapulae with a bony defect or erosion of the glenoid were excluded.
A 3D CT scan (AVE 1 Philips Tomoscan, 125 mA, 120 kV, 1 second; field of view, 120 mm; filter, 1H; slice, 1 mm; table speed, 1 mm/s; reconstruction index, 1 mm; Philips Medical Systems, Best, The Netherlands) and an MRI scan (3D T1-weighted, fast field echo, echo planer imaging, Matrix 256*256, 0.5 mm slice
Results
The MRI and CT images showed no difference in quality or appearance between the fresh and embalmed scapulae. All specimens had an exact circle-shaped inferior glenoid on the digital photograph and CT and MRI scans before the defect was created.
The measurements of the size of the glenoid defect taken from the different imaging modalities by the 2 researchers were analyzed. Figures 4, A and B show Bland-Altman plots for the comparison of the measurements taken from the digital photograph and the
Discussion
Although it is well known that a defect or erosion from the anteroinferior glenoid rim is a common finding in glenohumeral instability,3, 4, 8, 12, 17, 24, 27, 29, 32 the exact role of this finding is still being discussed. Some authors found a relationship between the presence and size of a glenoid defect and redislocation after Bankart repair,3, 4, 16, 22, 23, 31, 33 but others could not confirm this relationship.13, 20, 24 Future prospective studies are needed to investigate this particular
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