The Dyna Ankle is primarily used to treat lateral ligament ruptures, but it is also highly suitable for the treatment of medial ligament ruptures. Sprains of the upper ankle with lateral ligament rupture usually occur as a result of excessive plantar flexion and supination strain. The talofibular anterior ligament is always affected, so relieving strain on this outer ligament is important in terms of treatment. The Dyna Ankle dynamic ankle brace was developed for functional treatment and places the foot in a position with slight pronation and dorsal extension. Plantar flexion and supination are restricted via a dynamic restraint, while the degree of pronation and dorsal extension motion is unrestricted.