Functional evolution in total knee arthroplasty: first and second-generation patient-specific instrumentation compared with conventional instrumentation

Background: This study compares the functional evolution between first- and second-generation patient-specific instrumentation conventional pre-surgery third month post-surgery after TKA. We analyzed outcomes achieved absolute gains of each variable. In addition, we aimed to elucidate results three surgical techniques regarding surgery length time, hospital stay, percentage drop in hemoglobin (Hg) at 24 h, hip-knee-ankle angle post-surgery. Methods: reported our experience TKA using PSI Visionaire System® CI technique 688 procedures. The patients were divided into first (N=272) (N=151) designs. control group (N=265) underwent with CI. instruments for assessing functioning were: visual analog scale, goniometry, 6-minute walk test (6MWT), domains WOMAC Index. Results: months was lower than first-generation PSI. respective differences found 6MWT pain function scores (p=0.023, p=0.049, p=0.018, respectively). mean time higher compared designs (both p<0.001), stay (p=0.002). percentual Hg (p=0.006). Conclusions: Three TKA, greater However, similar.