Neer first popularised the use of primary hemiarthroplasty to treat complex proximal
humerus fractures, especially when the humeral head is nonviable or not
reconstructable with internal fixations, and with younger patients. (Copied from article).
The aim of this study was to investigate the intra- and inter-rater reliability of ultrasonography (US) to measure anterior translation of the humeral head (ATHH) among healthy subjects and patients with sacroiliac joint dysfunction.