you were talking about the shearing of the knee. What is your opinion about using knew wraps for both back and front squats? 

Wraps can he,p, but bar position would be a better choice to decrease shearing forces on the knee. Try a low bar. I have a video on the workout 101 page which explains this. Watch here. http://www.workouttrainer.com/home/videos/workout-101-redefining-the-parallel-squat