Secondary outcome measures will be the Mayo Elbow Performance Index ( MEPI ) , the Oxford Elbow Score ( OES ) , pain intensity through the ` Numeric Rating Scale ' , range of motion ( flexion arc and rotational arc ) , radiographic appearance of the fracture ( heterotopic ossification , radiocapitellar and ulnohumeral arthrosis , fracture healing , and signs of implant loosening or breakage ) and adverse events ( infection , nerve injury , secondary interventions ) after one year .