Arthroplasty as Primary Treatment for Metadiaphyseal Proximal Humerus Fractures: A Viable Alternative to Osteosynthesis for the Elderly. - Helal A; Heimdal T; Lo EY; Montemaggi P; Lund J; Garofalo R; Ouseph A; Krishnan SG (Journal of shoulder and elbow arthroplasty, 2023)