Thirty-eight patients with dorsally-displaced distal radial fractures were prospectively studied to assess the clinical effects of low frequency ultrasound treatment, started immediately after plaster removal. Nineteen of the patients represented the control group and a double-blind protocol was followed. Assessment took place on the day of plaster removal and 2 and 8 weeks later. There was no significant difference in wrist motion and duration of follow-up between the treated and control patients.