This trial will include consecutive adult patients with an acute ( up to 15 days ) displaced , unstable fracture of the distal end of the radius of type A2 , A3 , C1 , C2 or C3 by the Arbeitsgemeinschaft fr Osteosynthesefragen-Association for the Study of Internal Fixation classification and type II or type III by the IDEAL32 classification , without previous surgical treatments of the wrist .