1. Scapho-astragaloid dislocations usually take place when the foot is supinated and plantar-flexed.
2. A palpable caput tali and a prominent scaphoid with a depression proximal to it is the most important physical sign of dislocation in the scapho-astragaloid joint.
3. Open operation is usually indicated in order to hold a satisfactory reduction.
4. Resection of the head of the astragalus is often necessary in cases of more than two weeks standing.