10 weeks post op from patella femoral replacement. i'm experiencing burning medial of the patella and crutching at the top of patella. call surgeon?

Yes: Crunching or crepitus is common after reconstructive surgery and not to worry unless it is painful or there is an associated catch or clunk. The burning pain is not unusual but you may need more PT to improve your muscle balance and function. Of course, if you have redness, increased swelling, fever, drainage or any wound problem. seek immediate attention.