If you have knee arthritis involving both of the major areas of the knee and you still have pain after conservative care, then the entire joint needs to be resurfaced as a salvage. This provides good pain relief and can correct deformity. You are usually hospitalized for 4-5 days, and 3-6 months of time for rehabilitation is common. I have most people donate 2 units of their own blood to be available after surgery. Depending on your age and health, some time in a rehabilitation facility or home nursing may be needed.