Achilles tendon repair
A surgical repair of the Achilles tendon is required in the active patient in whom the tendon ends are demonstrated not to be in adequate apposition(under ultrasound imaging) when the ankle is placed into full equinus.
Another clear indication for surgical repair of the Achilles tendon is a delayed presenting Achilles rupture irrespective of how well tendon ends appose. The definition of delayed here is open to interpretation.
Apart from these situations most cases are open to debate.