1. The main factor that determines a satisfactory result is the operative technique; 2. The shelf operation for dislocated hips in spastic paralysis is without value; 3. The age of the patient appears to have little influence on the result; 4. Changes in the ilium induced by shelf implantation appear to be extremely important: 5. When the local condition indicates the need to stabilize a hip in a child, a shelf can be an invaluable asset.