Applying the munster cast: optimal motion control for scaphoid fractures.

The scaphoid is the most frequently fractured carpal bone, with fractures of the middle third accounting for 80% of all scaphoid fractures (1-3). These fractures are commonly treated with a thumb spica, long arm cast that immobilizes both the wrist and the elbow. This type of cast is cumbersome and creates economic hardship for some patients.