Background-Newer implants for total knee arthroplasty (TKA) often gain market share at higher cost with little patient-reported and long-term clinical data. We compared outcomes after TKA using two different implants: Depuy PFC Sigma and Attune.Methods-Using a prospective data repository from an academic tertiary medical center, we analyzed 2116 TKAs (1603 Sigma and 513 Attune) from April 2011 through July 2016. Outcomes included length of surgery, length of stay, facility discharge, 90-day reoperation, range of motion (ROM) change, and patient-reported physical function (PCS).Results-There was no difference in length of surgery (Attune −2.87 minutes, P=0.143). Implant type was not associated with extended LOS (>3 days) (OR 0.80, P=0.439). There was no difference in facility discharge (OR 0.65, P=0.103). Unadjusted 90-day reoperations were 0.3% for *