Objective To compare the early effect of the primary total knee arthroplasty(TKA) with different design concepts of knee prosthesis. Methods From January 2012 to December 2014, a total of 250 patients(250knees) with knee osteoarthritis(OA) was operated TKA, with 70 male and 180 female. The knee prosthesis of patients was one of LINK Gemini MK Ⅱ, Smith-Nephew Genesis Ⅱ and Biomet Vanguard. The American association of knee scoring system(including the clinical scores and function scores) was used to examine t...