1. A method of treatment of displaced supracondylar fractures of the humerus in children by manipulative reduction and fixation in plaster in full extension of the elbow and supination of the forearm is described.

2. The method is easy, safe and requires a short period of hospitalisation. The carrying angle at the elbow can only be recorded, controlled and maintained when the elbow is extended and the forearm is fully supinated. Thus cubitus varus can be avoided.

3. The results of treatment in seventy-two displaced fractures treated by this method are reported.

4. Treatment by other methods is reviewed.