Splints: mechanics versus convention.

Splints are specialized engineering machines that are created to solve specific upper-extremity problems. Astute manipulation of mechanical concepts increases splint efficiency, enhances patient comfort and function, and improves splint durability, while diminishing cost and frustration. Creation of splint designs should be based on mechanical fact rather than on mode-of-the-day bias. Those who are responsible for the treatment of upper-extremity dysfunction and use splinting as a treatment modality must have a thorough working understanding of the engineering concepts involved. Splinting is both science and art but the ultimate criterium is does it work mechanically? If a splint does not work mechanically, then there is no reason for its application. The insight provided by understanding engineering concepts opens new horizons in patient treatment for those who take the time to learn.