<qa>  What is the difference in functional outcome?No studies have been carried out to assess whether operative treatment with plate fixation is superior in displaced complete articular distal radius fractures to nonoperative treatment in patients with these fracture type. Therefore, with this randomized controlled trial the investigators wish to determine the difference in functional outcome, assessed with the Patient Related Wrist Evaluation PRWE, after open reduction and plate fixation compared to nonoperative treatment with closed reduction and cast immobilization. 