This study states that Static back subluxation of the humeral head is a pre-osteoarthritic distortion going before back disintegration in youthful patients. Its etiology stays obscure. The point of this examination was to dissect the distinctions in scapular morphology between youthful patients with pre-osteoarthritic static back subluxation of the humeral head and sound controls with a focused humeral head. 

We played out a review examination of all patients with pre-osteoarthritic static back subluxation of the humeral head who were treated in our organization between January 2018 and November 2019. Fourteen shoulders in 12 patients were remembered for this examination and afterward coordinated concurring their age, sex, and influenced side with controls. Processed tomography pictures of the two gatherings were analyzed in the normalized hub imaging plane for contrasts in scapular morphology. The accompanying boundaries were estimated: glenoid variant comparative with the Friedman line and scapular cutting edge hub, scapulohumeral and glenohumeral subluxation record, and neck point, just as glenoid and humeral balance.The patients in the subluxation bunch showed essentially higher scapulohumeral and glenohumeral subluxation lists than controls. 

Reference link- https://www.jshoulderelbow.org/article/S1058-2746(20)30678-9/fulltext