Difference Between Open And Closed Knee Brace What Is Th Difference Between Open Patella And Closed Patella Knee Brace?

What is th difference between open patella and closed patella knee brace? - difference between open and closed knee brace

I'm trying to buy support for the functioning of the knee and take bothers me in the right knee at times. Can someone explain the difference between open and closed patella? I also have a bone bruise (I believe it is called Osgood Schlatter) under my knee, it affects me physically, but it affects my decision to choose one or the other?