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AP and lateral radiograph of dorsally displaced distal radius fracture, modified with fracture measurements. (A) Radial measurement from distal articular surface to fracture line. (B) Ulnar measurement from distal articular surface to fracture line. (C) The line of the fracture used to calculate the mean angle by comparison to (D) the angle of the radiocarpal joint. Image Courtesy: https://commons.wikimedia.org/wiki/File:Collesfracture.jpg ; author: Lucien Monfils.
