Adhesions are a rare complication from some types of surgery. They are many times misnamed as “scar tissue.” But in reality, they occur when surfaces of soft tissue get hot and dry and no longer glide smoothly across one another. This can happen when tissue is inflamed, as the heat contributes to dryness. When the tissues don’t move properly over one another, they can stick together and “adhere” to one another, restricting movement. I seriously doubt this is what is going on in your knee. Swelling can take a long time to resolve sometimes…especially if you are pushing your activity a bit.
Some thoughts as I read your thread….
You mention you are not using any type of walking aid around the house. This is okay as long as you are not limping or grabbing on to things for support as you move about. If you are doing either of these (especially the limping), it means it’s too soon to stop using a cane or walker for support. There are no prizes given for tossing these aids early in your recovery. It’s much better to continue to use whatever works best so that your body has time to develop strength to walk with a good, long stride. Gait is very important and it’s something you can discuss with your therapist. Many are trained in gait therapy and can help with that.
Be sure you are getting plenty of protein each day. This is the most critical food for good recovery as it contributes to healing and development of new tissue. It’s great to supplement food with high-protein products such as Ensure, Boost, or Glucerna.
I’m sorry both your surgeon and therapist are telling you that your knee might get “stuck” at a certain ROM if you don’t push yourself. As long as you are not couch-bound all day and are moving around routinely, this will not happen. Some people just take longer to heal than others. Our bodies are all unique and totally in control of this recovery. The best we can do is to give it the tools it needs to do its job (like good nutrition and plenty of water) and allow it the time needed to get the job done. I’m glad you are listening to your own body and responding to these comments accordingly. No one knows your body better than you. We have tens of thousands of BoneSmarties here who will tell you the more gentle approach to recovery worked well for them.
I think you’re doing just fine. You are still very early in this recovery process. It is a marathon and not a sprint that can take a year or more before you realize all the benefits of having your knee replaced.