Comparison of eleven external fixators for treatment of unstable wrist fractures.

We compared 11 external fixators for treatment of wrist fractures on the basis of rigidity, weight, cost, design characteristics, and provision for allowing wrist motion, and found important differences between them such as rigidity varying as much as 11 times. The Roger Anderson, Hanson Baylor Mini Hoffman, Rectangular Mini Hoffman, and Ace Colles external fixators are lightweight and have low rigidity. The C-series Hoffman unilateral frame and the A.O. have intermediate rigidity. The newly developed methylmethacrylate fixator, the regular Hoffman, the C-series Hoffman bilateral frame, and the Clyburn are more rigid. Although both the Clyburn and the Orthofix allow wrist flexion and extension, the Clyburn is lightweight and the Orthofix has the highest rigidity. These factors are analyzed and reported in a format that will guide the surgeon in the selection of an appropriate fixator for his patient with an unstable wrist fracture.