title: Computer-assisted versus manual TKA: no difference in clinical or functional outcomes at 5-year follow-up.
abstract: The purpose of this study was to determine whether differences in clinical, functional, or radiographic outcomes existed at 5-year follow-up between patients who underwent computer-assisted or manual total knee arthroplasty (TKA). Seventy-eight consecutive TKAs were performed by a single surgeon who had extensive experience performing computer-assisted and manual TKA. The manual group (n=40) and computer-assisted group (n=38) were similar with regard to age, sex, diagnosis, body mass index, surgical technique, implants, perioperative management, Knee Society scores, and anteroposterior mechanical axis. Sixty-three (manual group, n=34; computer-assisted group, n=29) patients were available for final follow-up. At 5-year follow-up, no statistically significant differences were found in Knee Society knee score (P=.289), function score (P=.272), range of motion (P=.284), pain score (P=.432), or UCLA activity score (P=.109) between the 2 groups. Postoperative radiographs showed a significant difference in the mechanical axis (P=.004) between the 2 groups; however, both groups achieved a neutral mechanical axis of ±3° (computer-assisted group mean, 2.0°; manual group mean, -0.24°).When TKA was performed by an experienced surgeon, no significant difference was identified at 5-year follow-up between patients who underwent computer-assisted vs manual TKA.
authors.affiliation: Department of Orthopaedic Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA. myaffe@fsm.northwestern.edu
authors.forename: Mark
authors.initials: M
authors.lastname: Yaffe
authors.forename: Philip
authors.initials: P
authors.lastname: Chan
authors.forename: Nitin
authors.initials: N
authors.lastname: Goyal
authors.forename: Michael
authors.initials: M
authors.lastname: Luo
authors.forename: Max
authors.initials: M
authors.lastname: Cayo
authors.forename: S David
authors.initials: SD
authors.lastname: Stulberg
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019645:Arthroplasty, Replacement, Knee / Q000706:statistics & numerical data*; D005260:Female; D006801:Humans; D007087:Illinois / Q000453:epidemiology; D007593:Joint Instability / Q000175:diagnosis / Q000453:epidemiology* / Q000601:surgery*; D008137:Longitudinal Studies; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D020127:Recovery of Function; D018570:Risk Assessment; D025321:Surgery, Computer-Assisted / Q000706:statistics & numerical data*; D016896:Treatment Outcome