I'm sure you've heard this many times, but every knee is different, therefore will heal at different rates. Even two knees on the same person done at the same time heal at differing rates. For a doctor or PT to say you're behind is not true. Your knee is exactly where it should be. How do I know this? Because your knee is going to heal at it's own pace and nothing you do to push it will make it heal any faster; although doing too much PT can set it back somewhat. As long as you aren't overdoing PT and causing it to swell and be more painful, and are doing the activities of daily living, you are fine. Celle left you a reading list, and I hope you read them all. I actually read the activity progression one daily to remind me not to do too much, or too little, at any given point. If you continue with PT, (and, personally, I wouldn't) you need to take charge and tell the PT no more discouraging talk, only positive reinforcement will be allowed! No one can make you feel bad without your permission, and I would stop that PT in his/her tracks when they try. I am almost at a year post-revision and don't know my ROM as I never had PT this time, nor did I let anyone measure my ROM. Rom is just a number to me; my goal was to get to a place where I could walk, sit, stand, bend, straighten and flex enough to swim, ride a bike, and so on, but I never set a time frame as I knew it would take time and I allowed my knee as much time as it needed to heal. Knowing numbers wouldn't make a difference to me anyway-only actual ability to do said activities, so I've never worried about any of them. Take charge of your recovery and set your own limits and goals; allowing others to decide limits and goals for you is a recipe for continuous letdowns and discouragement. Tell your PT, and doctor as needed, that your knee is healing at it's own rate and not along any pre-determined rates for everyone! Good luck and keep us posted!