This project is set to describe by objective measures as the range of motion and weight-bearing ability of the distal radioulnar joint one to five years after primary implantation of a Scheker total distal radioulnar joint prosthesis.The range of motion and stability of the distal radioulnar joint (DRUJ) are important outcomes to preserve function, especially the pronation and supination. Unlike other ulnar endoprostheses that replace only the ulnar head, the Scheker prosthesis replaces the ulnar head, resurfaces the lesser sigmoid notch, and is semi-constrained in design.

Inclusion Criteria:

• Patient treated with a Scheker total distal radioulnar joint prosthesis and with a follow-up time between 12 and 60 months after primary implantation
• Patient willing and able to give written informed consent to participate in the study

Exclusion criteria:

• Inflammatory disease (e.g. rheumatoid arthritis)
• Pregnant women
• German language barrier to complete the questionnaires
• Any disease process that would preclude accurate evaluation (e.g. neuromuscular, psychiatric or metabolic disorder)
• Legal incompetence
• Participation in any other medical device or medicinal product study within the previous months that could influence the results of the present study

Patient treated with a Scheker total distal radioulnar joint prosthesis and with a follow-up time between 12 and 60 months after primary implantation, who were willing and able to give written informed consent to participate in the study.