Standard total knee recovery. Zimmer’s nexgen® complete knee solution lps-flex fixed bearing knee is a type of total knee implant. Zimmer states that it is the first knee approved for 155 degrees of flexion. You can expect a 1-3 day hospital stay. Depending on your surgeon's preference...You usually work with physical therapy in the inpatient stay and after discharge will require some sort of continued pt. I tell all my patients that swelling and sensation of fullness my be normal for several months after surgery. The specific rehab program that you need will depend on your preoperative activity level and your expectations for activity after knee replacement. Tka surgery is very successful in regards to pain relief of arthritis pain.