16 weeks post-op Microfracutre surgery

[Amy29]

I am now 16 weeks post-op and things are going okay.  I have started to wean myself off my one crutch, can bend it fine but am still having problems straightening it - I am down to -15 degrees extension but still not great. 

My next Orthopaedic appointment is in September and I got told that if I still can't straighten it then, I will probably need to get a release. 

Has anyone ever had one of these? If so, what's it like and how long does it take to recover?