Distraction
Certain types of nonunions respond well to distraction.
Slow gradual distraction of bone segments is generally applied at the rate of ½ to ¾ millimeter per day by moving the rings progressively apart (by distracting the ring connectors)
Although it may seem counter intuitive, the mechanical force transmitted during the process of distraction (pulling the bone segments apart) results in improved local vascularity and rapid healing in certain types of nonunions.
