A joint resurfacing system for repairing defects in the articular surface of the distal radioulnar joint. The system includes a hemiarthroplasty implant device for the ulna resulting in minimal removal of the underlying bone. The implant device includes a curved body, an interior surface and an opposed exterior surface, where the interior surface is coupled to an articular surface of an ulna bone. The system also includes a fixation device having a threaded end with the threaded end coupled to the implant device in order to apply a compressive force on the implant device. the fixation device may be selected from either a dynamic fixation device or a static screw device.