Introduction: The value of dynamisation of statically locked intramedullary (IM) nails in the treatment of delayed-union of the tibia has been poorly documented. Many authors report no effect on the speed of fracture union. We performed a biomechanical study using cadaveric bones to measure the forces required to compress and distract the interfragmentary gap in a tibial shaft fracture model fixed by IM nailing in dynamisation mode. We also measured interfragmentary movements that occur under physiological loading conditions with the IM nails statically locked.
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© 2011 Published by Elsevier Inc.