1. Posterior bone block of the ankle is productive of permanent satisfactory correction of drop-foot deformity in a high percentage of cases.
2. If possible, the operation should be performed when the patient is between ten and twenty years of age.
3. It should be done in conjunction with arthrodesis of the talonavicular, subtalar, and calcancocuboid joints. Care should be exercised to preserve the circulation of the talus.
4. Tendon transference should be done, when possible, after the principles laid down by Peabody and Crego and McCarroll. Better results are obtained when there is a balance of power between dorsiflexors and plantar flexors of the ankle.
5. We prefer an intra-articular block, placed immediately posterior to the talus, so that it will impinge on the posterior lip of the tibia.
6. This operation should be reserved for those patients who can be rendered bracefree thereby.