Hallo All

First wish to u a fast and full recovery.
In case of chondromalacia x-ray 'll be normal,depends more on clinical findings as Q-angle,...
Any way u've to strengthen ur quadriecps muscles in terminal extension so there is minimal stress to patellofemoral joint,high repetion with low resistance to the point of fatigue is less traumatic to joint than opposite!!,u've to focuse more on sensation of vastus medialis muscle contracting to emphasize it's medial pulling on patella,Stretch iliotibial band ,
Avoid stairs climbing and descending until muscles strength return back,don't make ur's knees flexed excessivly at sitting for prolonged periods,...