Just got a partial knee replacement done yesterday. The procedure is known as MAKO robotic arthroplasty using Stryker Triathlon stainless/titanium parts.
Here's a vid giving a good overview:
So far, so good no problems aside from having to chunk pain pills. 3-5 weeks is the best case for recovery (defined as being to move about without aids). Robotics being used now make it possible to have fewer problems down the road.
I did the shots (joint juice) for a couple years. Cortisone, then hyaluronic acid. Had to pull the trigger though when the shots no longer killed the pain.
Am starting PT today.