Influence of Local Bone Status on Complications After Surgical Treatment of Proximal Humerus Fractures

Inclusion Criteria: * Radiologically confirmed closed fracture (within 10 days) of the proximal humerus * All dislocated (mod. Neer) proximal humerus fractures except dislocated fractures of the greater and lesser tuberosity * Primary fracture treatment with a PHILOS-plate * Age equal greater than 50 and equal younger than 90 years * Normal function of both shoulders (pre-trauma) according to age * Monotrauma * Willing and able to give written informed consent to participate in the study * Willing and able to participate in the study follow-ups according to the CIP * Willing and able to comply with the postoperative management program * Able to understand and read country national language Exclusion Criteria: * Open proximal humerus fractures * Concomitant contralateral proximal humerus fracture * Previous proximal humerus fracture on either side after the age of 25 * Time to operation \> 10 days * Polytrauma * Cuff-arthropathy of the contralateral proximal humerus * Associated nerve or vessel injury * Regular systemic therapy with corticosteroids due to chronic disease * Legal incompetence * Patient received radio- or chemotherapy prior to, during or within the last year * Currently active cancer * Recent history of substance abuse (i.e. recreational drugs, alcohol) * Prisoner * Currently involved in a pharmaceutical clinical study§ * Has a disease process that would preclude accurate evaluation (e.g. neuromuscular or rheumatic disease, significant psychiatric or metaboli…