Clinical application of double dorsal plates for the distal radius fractures

The purpose of this study was to develop plates that fit the contour of the distal radius of the Japanese and can be inserted less invasively. Three-dimensional models of 36 radii of 18 volunteers were prepared. Using these models, the shape of the cortical bone on the radial margin of the distal radius and just below the dorsal fourth compartment of the wrist, to which the plates were expected to be applied, was measured, and the curves of the plates were determined. The functions of approximated curves of the plates were: [y = -2 x 10(-8) x5 - 2 x 10(-6) x(4) + 0.0006 x3 - 0.0312 x2 + 0.3274 x + 15.224 on the radial margin of the distal radius and [y = 7 x 10(-7) x5 - 0.0001 x4 + 0.0078 x3 - 0.2355 x2 + 3.1815 x - 5.6383 just below the fourth compartment. The clinical results of the application of double dorsal plates were satisfactory in clinical cases for the distal radius fractures.