PURPOSE : To analyze the results of open reduction and AO miniscrew fisation in displaced radial head fractures in adults. Materials & Methods : We analyzed 10 cases of displaced radial head fractures who were operated with open reduction and AO miniscrew fixation from January 1996 to March 1998. All of the fractures were classified in the Mason classification. The functional rating index was used in follow-up assessment. RESULTS : Average flexion was 143.5degrees, and the mean fixed flexion deformity was 3.5 degrees. The average elbow score was 95.6 points Good or excellent results were achieved in 100%. No patient had evidence of valgus instability. CONCLUSION : We concluded that open reduction and internal fixation in Mason type II and reparable Mason type III radial head fractures gives satisfactory range of motion and stability in the elbow joint. We suggest that anatomical reduction of fracture fragments, rigid fixation, early mobilization and proper implant placement are important for the restoration of the elbow function