The cost-effectiveness of healthcare interventions, especially new technology, is becoming essential. Comparing the procedural costs of robotic-assisted surgery and the outcomes of the patients versus TKA, the gold standard, will help substantiate whether robotic-assisted surgery from an economic viewpoint is a cost-effective treatment. In addition the rehabilitation after knee replacement surgery is critical to achieving proper functional outcomes. Information pertaining to knee replacement post discharge costs has been limited. Due to the lack of studies and the continued growth in the number of knee arthroplasty surgeries it is imperative to track post discharge costs of all variables. We will be documenting and comparing the procedural and postoperative costs, recovery time, and outcomes of three procedure types in robotic assisted unicompartmental knee arthroplasty, robotic assisted bicompartmental knee arthroplasty and manual total knee arthroplasty.