Sometimes I just don't understand the military. Armies today aren't held together by it's officers or soldiers; they're made possible by the average Joe who finances them, among other things, by going to work, punching a clock, and paying his taxes. I realize they don't want to make getting out of the army on medical grounds too easy to prevent everyone from trying it, but in some cases pulling people through the system for months (years?) makes little sense. I have a friend with epilepsy who was old enough to be called up before they got rid of the compulsory military service in Croatia. Instead of just declaring him unfit on the spot the moment he was diagnosed, the army spent years sending him to costly examinations every 6 months so he can give them a certificate proving he still has a medical condition for which there is no cure.
I don't get why they don't just release you from military service, under the circumstances; their course of action makes no sense to me. You had a 9 year old leg injury resulting in this condition right now. Don't get me wrong, I wish you total recovery, but it doesn't seem like a few months of physio-therapy are going to do that. From a purely practical point of view, the army can either spend money on your therapies, never getting a soldier they really want, or they can release you so you can get on with your life and career and in effect start financing them by becoming a tax-paying working man.