Orthopaedic Treatment Proximal Humeral Fractures

Prospective non-randomized, open, unicentric observational study to compare two different treatments for Three-four parts fractures of proximal humerus (Neer's Classification) in elderly patients (over 75 years old). Both technics are: Sling inmobilization and shoulder arthroplasty.

The investigators propose an observational study that aims to assess: * Primarily, the functional results of a cohort of 20 pacients presenting fractures of 3 and 4 parts of proximal humerus (according to (Neer's Classification) that will be treated orthopedically (this is, non-surgically). This patients will be recruited in the emergency room of our center, and after being diagnosed of their fracture, will be treated with a sling for three weeks and subsequent rehabilitation treatment. Our intention is to assess the function of the injured shoulder using functional scales (ASES, DASH and Constant score, and VAS scale) at the time of three and twelve months from the date of the trauma. * Secondly the investigators want to compare the results obtained in this cohort with the results of a historical cohort of patients operated in our center with the same type of fracture. Both types of treatment (non-surgical and shoulder prosthesis) are valid for this type of fracture, and endorsed by the scientific literature. The investigators consider this to be an observational study since it assigns a single cohort of patients a single treatment (ie non-surgical treatment). The conservative treatment for this fractures is part of routine medical care, and the object of this study is to evaluate the effect of this intervention.