hi,
first i dont want to damage the ortho,s image,but as a physio i could not digest it.nowadays all surgeons are refering ortho cases to physio to minimize post operative complications.i think you may have following problems
1.knee muscle power weakness
2.stiffness in knee aswell as in hip
3.decrease patellar mobility.
4.gaitwith increased steps.
please visit near by physio and get assessment for your knee and hip functions.if the physio finds any changes than you start doing your exercises for a week and learn it. try to do yourself.
i think this will help you to find out the problem