The effectiveness of a volar or a dorsal plaster of Paris slab for spl
inting a hand in the 'safe' position was studied prospectively. Sevent
y-two splints, comprising 36 dorsal and 36 volar, were applied. Measur
ements of the metarcarpophalangeal joint angle and the proximal interp
halangeal joint angle on the lateral radiograph revealed the volar spl
int to be significantly more consistent in securing the proximal inter
phalangeal joint angle at less than 15-degrees. There was no significa
nt difference between volar or dorsal splints for the metarcarpophalan
geal joint angle. As the volar splint was also subjectively more comfo
rtable, its use is recommended.