title: Reliability of patient specific instrumentation in total knee arthroplasty.
abstract: The aim of this study was to compare the precision between Patient Specific Instrumentation (PSI) and Conventional Instrumentation (CI) as determined intra-operatively by a pinless navigation system. Eighty patients were included in this prospective comparative study and they were divided into two homogeneous groups. We defined an original score from 6 to 30 points to evaluate the accuracy of the position of the cutting guides. This score is based on 6 objective criteria. The analysis indicated that PSI was not superior to conventional instrumentation in the overall score (p = 0.949). Moreover, no statistically significant difference was observed for any individual criteria of our score. Level of evidence II.
authors.forename: Harold
authors.initials: H
authors.lastname: Jennart
authors.forename: Marie-Ange
authors.initials: MA
authors.lastname: Ngo Yamben
authors.forename: Theofylaktos
authors.initials: T
authors.lastname: Kyriakidis
authors.forename: David
authors.initials: D
authors.lastname: Zorman
mesh_terms: D000368:Aged; D019645:Arthroplasty, Replacement, Knee / Q000295:instrumentation*; D004867:Equipment Design; D005260:Female; D006801:Humans; D008297:Male; D020370:Osteoarthritis, Knee / Q000601:surgery*; D012189:Retrospective Studies; D025321:Surgery, Computer-Assisted / Q000379:methods*