Analytical radiography and the progressive approach in talipes equinovarus.

1. A radiographic method is described for making the diagnosis of talonavicular subluxation before ossification of the navicular occurs. 2. Seven basic deformity combinations are thought to occur in clubfoot. 3. Preoperative analytical radiography enables the surgeon to determine which of these combinations exists in a particular foot. 4. The progressive approach, a comprehensive sequential plan of corrective surgery, indicates the appropriate treatment for each of the seven deformity combinations that may exist in a clubfoot following initial conservative treatment. 5. At the time of surgery the surgeon uses analytical radiography during the operation to determine whether the surgery has been successful or whether the next stage of the progressive approach will be required to correct the deformity combination.