Specifically Designed for Proximal Humeral Fractures Hemi-arthroplasty for 3 and 4 Part Proximal Humerus Fractures is one of the most challenging procedures facing surgeons today. Options depend on fracture anatomy, bone quality and patient functional demands. Generally, percutaneous and/or plate fixation osteosynthesis is recommended for young patients with good bone. Hemi-arthroplasty is indicated in the low-demand elderly patients with osteoporotic bone and severely displaced articular surface fractures.