A new method for treating isolated fractures of the os trapezium.

Isolated trapezium fractures are rare events. As standard radiographic methods may fail to diagnose this injury, specific radiographic projections are needed to separate the outline of the trapezium from the other carpal bones. Computed tomography can be helpful in visualizing the true shape of fragments. In this report a vertical and transversal isolated fracture of the trapezium was repaired by using the dynamic Herbert compression screw technique. Open reduction and internal fixation resulted in union with excellent thumb function and joint restoration. A report of this case and the special technique of treatment is combined with a discussion of literature.