Had both knees replaced, one last December and the other 4 weeks ago today. Same surgeon, same replacement, same hospital, same PT place. World of difference in how they healed. First knee I was on a walker for 14 days, cane for another 8 days, lots of pain. It worked out OK though, happy with it. The one 4 weeks ago is coming along much better and faster. On a walker for 6 days, cane for another 6 days, not nearly as much pain. Only 2 more PT sessions since I hit over 120 degrees of flexibility a couple of visits ago. Then its off to the YMCA gym 2x a week for the rest of my life, to maintain my range of motion and strength. Those that do not do proper PT, and do not do some type of regular physical activity for the knees after PT, will never have as good a result as those that keep at it.
First time my legs have been straight for 30+ years. The left one was out 13 degrees, the right one 8 degrees. Just the way they wore through the decades.