 Complex Regional Pain Syndrome or posttraumatic dystrophy is a pain syndrome which develops after a trauma, surgery or for unknown reason. The incidence after wrist fractures varies in literature from 2 - 37. The female sex is involved three times as much as the male sex. There is one study in literature which describes a prophylactic effect of vitamin C after wrist fractures. Goal of this study is to search for a dose dependent effect of vitamin C and to replicate these earlier findings. 