Biomechanical analysis of a new external fixation system and its clinical significance.

The present study was conducted to analyze the biomechanical properties of a new external fixation system. Each frame was tested in compression, tension, and four-point bending and compared under similar conditions with the performance of the standard configurations of the Orthofix, Hoffmann, and AO models. With the new model we are able to create frames of variable rigidity, both higher and lower than that of the commercially available models. It was also possible to change the rigidity of the new frame as the fracture healed without losing the stability of the fracture. This study demonstrated that the new design, with its simplicity, versatility, and modularity, has sound biomechanical properties and these compare well with the clinical success that the model has achieved during trials.