[annapurna]

If you do go forward with the operation, I'd strongly suggest a very careful rehab plan. Any muscle attached or working through the fused level that's being revised to an ADR will have spent a year idle and generally losing strength. You're then going to switch that level to an ADR that requires a degree of dynamic stability from strong muscles.

Take it slow and easy but plan on a long careful rehab with lots of strength-building. Of that sentence, the "slow and easy" part is definitely more important than meeting some pre-determine mark for strength at a given pace. Don't let the physical therapist push you too fast or too far. I don't know if you have the problem in your country but here in the US, there's a lot of poorly qualified therapists who are doing a lot more harm than good.