RESUMEN
Objective To investigate method of in vitro measurement of adult Chinese scapula glenoid version angle with MSCT postprocessing technique. Methods Fifty dry scapula specimens and 50 wet anticorrosive shoulder specimens of adult Chinese were scanned with Siemens Somatom Sensation 16 scanner. The scapula glenoid version angle was measured with postprocessing technique of thick or thin multiplanner reformation (MPR), and the data were analyzed statistically. Results The scapula glenoid version angle of dry scapula specimens and wet anticorrosive shoulder specimens was (-0.40±4.10)°, (-3.00±4.49)° with thick MPR, and (-0.34±4.21)°, (-2.70±4.54)° measured with thin MPR, respectively. There was significant difference of the scapula glenoid version angles between the dry scapula specimens and wet anticorrosive shoulder specimens (P0.05). Conclusion Measuring the scapula glenoid version angle with thick MPR of MSCT is simple and fast. The scapula glenoid version angle is markedly variable between the dry scapula specimens and wet anticorrosive shoulder specimens. The retroversion angle of scapula glenoid is about 3°, which should be considered in the design of shoulder prosthesis.
RESUMEN
Objective To assess the relationship between anterior-inferior glenohumeral instability and glenoid version.Methods Both shoulders in 24 patients with unilateral anterior-inferior glenohumeral instability were scanned with multiplanar spiral CT scanner(MSCT).The scapula and the humerus were reconstructed by the volume rendering technique and multiplanar reformation in 4 slices on axial plane from glenoid top to its bottom.The scapular glenoid version angles of 24 patients were measured bilaterally in 4 levels,and compared bilaterally by statistic analysis.Results From the top to the bottom,the scapular glenoid version angle in the side with anterior-inferior glenohumeral instability was respectively(-15.24?10.18)?,(-8.22?8.47)?,(-2.88?4.56)? and(-2.49?6.43)?,while the angle in the healthy side was respectively(-15.07?12.11)?,(-10.63?7.25)?,(-6.04?3.61)? and(-5.26?3.02)?.Only the difference at the 4th plane was significant between the healthy side and the affected side(P