Midterm functional recovery of Total knee arthroplasty patients compared between the ATTUNE knee system and the press fit condylar (PFC) SIGMA knee system

Abstract Background The ATTUNE Knee System is a new prosthetic design that has theoretical advantages over the Press Fit Condylar (PFC) Sigma specific to improved knee kinematics and patellofemoral joint tracking. This study aimed evaluate functional outcomes compared between PFC designs at minimum follow-up of 5 years. Methods We retrospectively reviewed data from total arthroplasty (TKA) patients who received either or system during November 2013 February 2015 Siriraj Hospital (Bangkok, Thailand). Functional were evaluated using Timed Up Go (TUG) test, 2-min walk test (2MWT), modified score, numerical rating scale-pain, range motion (ROM), rate anterior pain crepitation preoperation, 3-months, 1-year, 5-years postoperatively. Results Of 113 patients, 59 54 systems, respectively. At follow-up, all significantly preoperative period although TUG 2MWT declined 1- postoperatively only in group. mean ROM was higher than Sigma; however, difference small (116° vs. 110°, respectively; p = 0.041). There no significant differences any other outcome measurements, including pain, clunking, crepitation, groups time point. Conclusions ​Our results revealed major TKA an intermediate-term least Longer-term needed benefits relative polyethylene wear aseptic loosening.