It has nothing to do with the bone at all.
I've been to Dr Betz PT right now where we spoke a lot about my x-legs and it is purely from muscle atrophy when not standing up or moving around.
It is very difficult to get those muscles back in a proper way. You need to work on them right.
Everyone who did LL has some sort of problems but they just don't know about it bc it doesn't affect them in their day to day life.
The ones who say they are 100% recovered, just forget about it. They're not. They just think so bc they can do all they need to do in their life, probably just go to work and back home.
If you would test these guys on a balance board or range of motion in their legs they would fail catastrophically.
You can't heal from this kind of trauma.
You will get permanently slower, more stiff and never get your explosiveness back.
Most of the times people don't need these things either - but that doesn't mean they are 100% recovered, or even 80% for that matter.