@ossobuco,
Not bending is the hardest to learn, remember and obey. It's not natural, but must be to end up with a successful new hip. For example, I can't pick up the toys left on the floor by Dolly and Madison doggies. I can't put my shoes on my feet. No bending!!!
By the way, the surgery caused my right leg to be at least 1-1/2 inches longer, which doesn't match my left leg. Will have to have new shoes to correct the difference so that I can walk appropriately.
My advise is for you to protect your knees and hips so you don't have to go through what I've had to, especially at an old age. However, I'm glad doctors have learned to replace those injured bones.
BBB