Acromioclavicular reconstruction techniques after acromioclavicular joint injuries: A systematic review of biomechanical studies.

Background: Residual horizontal instability after surgical treatment for acromioclavicular joint injuries is seen as a potential cause of suboptimal clinical outcomes. Biomechanical studies have demonstrated that the acromioclavicular capsule/ligaments are the primary restraints for anteroposterior translation. However, limited studies have addressed the biomechanics of a reconstruction of the acromioclavicular capsule/ligaments.

Prevalence and risk factors of scapular stress fracture after reverse shoulder arthroplasty: a multicentric retrospective study.

Purpose: Scapular stress fracture (sSF) is a difficult complication to treat after reverse total shoulder arthroplasty (RSA). The aim of this study was to identify the prevalence and possible risk factors in a large population.

Methods: A total of 2165 RSAs that were implanted between January 2006 and October 2017 in five hospitals were evaluated.