Cineradiographic study of wrist motion after fracture of the distal radius.

Residual dorsal tilt is one of the main deformative factors in the malunion of fractures of the distal radius. We investigated the effect of such tilt on the range of wrist motion and on carpal alignment in a cineradiographic study of wrist motion in 30 patients with extra-articular Colles' fracture. With increased dorsal tilt, the range of wrist motion became more restricted and abnormalities of carpal alignment during wrist motion became apparent. When the dorsal tilt was less than 10 degrees, the effects on the range of motion and on the dynamic carpal alignment were small.