Surgery for a torn ankle ligament would be considered in patients who either have persistent pain, and/ or instability.
We usually try conservative management for a torn ligament first, and if symptoms persist, and do not get better after 6 months, patients should consider a surgical option.
This is also important if a patient is young, has symptoms of early post-traumatic osteoarthritis, and is a high demand patient. This could mean high demand in terms of sporting, or just normal day to day activity.
It would also be prudent to consider a repeat MRI if the last scan was done some time back. So that the proper and appropriate surgical option can be planned.
Best regards
Dr Sean Ng