The purpose of this study was to evaluate the factors influencing the size of a Hill-Sachs lesion in traumatic anterior instability of the shoulder. Forty-one shoulders with traumatic anterior instability of the shoulder were evaluated.
There were 31 males and 10 females with an average age of 25.7 years (range,14-48 years).We measured the size of the Hill-Sachs lesion by axial and coronal MRA images. The patients were divided into two groups by the size of their Hill-Sachs lesion: Group A with a size smaller than the mean size, Group B with a size larger than the mean size.
We statistically evaluated sex, past history of trauma, age at initial dislocation, times of dislocation, period after initial dislocation, the Carter sign, the Sulcus sign, anterior and posterior instability, external rotation and epilepsy.
There were significant differences between Group A and Group B in the number of times of the dislocation and period after the initial dislocation.
