1. Advanced calcaneocavus includes structural bone changes in the calcaneus, as evidenced by an increase in the tuber angle.
2. The objective in the treatment of calcaneocavus is to obtain a corrected, stable foot which is as nearly normal in appearance as possible and which will afford a good weight-bearing surface when fitted with a normal shoe.
3. Shifting the foot posteriorly in order to obtain a long posterior lever arm is felt to be unsound and undesirable if a secondary foot deformity is thereby produced.
4. The two-stage operative procedure for stabilization of the calcaneocavus foot which has been presented facilitates the removal of a posterior bone wedge from the subtalar joint, allowing rotation of the calcaneus to a horizontal position and restoring heel length.
5. Immediate postoperative care is nsecessary in order to minimize complications due to pressure within the cast.
6. In a preliminary survey it was found that the objectives of the operation were obtained in twenty-one of the twenty-four feet available for evaluation.
7. A major complication occurred in only one case. There were no infections.