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The distal intra\u2010articular surface of the radius rested against a model scaphoid and lunate, simulating 45\u00b0 of wrist extension. The scaphoid and lunate were attached to a load cell that in turn was attached to an impact plate. Impulsive impacts were applied at increasing energy levels, in 10\u2009J increments, until fracture occurred. Three 45\u00b0 stacked strain gauge rosettes were affixed along the length of the radius quantifying the bone strains. The mean (SD) fracture energy was 45.5 (16)\u2009J. The mean (SD) resultant impact reaction force (IRFr) at failure was 2,142 (1,229)\u2009N, resulting in high compressive strains at the distal (2,718 (1,698)\u2009\u00b5\u03b5) and proximal radius (3,664 (1,890)\u2009\u00b5\u03b5). We successfully reproduced consistent fracture patterns in response to dynamic loads. The fracture energy and forces reported here are lower and the strains are higher than those previously reported and can likely be attributed to the controlled, incremental, dynamic nature of the applied loads. \u00a9 2011 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. 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