Inclusion Criteria:  ≥ 18 years of age at the time of radial capitate implantation surgery Males and Females Patients surgically treated for radial capitellum fracture undergoing prosthetic replacement with smooth-stemmed modular metal radial capitellum prosthesis at the Shoulder-Elbow Department of the Rizzoli Orthopaedic Institute from 2003 to 2011.  Exclusion Criteria:  < 18 years old at the time of surgery Patients treated with radial capitellum prosthesis implantation in fracture outcomes (e.g., secondary instability) Patients who at the time of telephone contact have contraindications to the execution of radiographic examination All available patients will be invited to perform the clinical examination and radiographic examination. If some patients are unable to undergo radiography due to possible contraindications, they will still be seen to collect the primary clinical outcome.