title: Radiological results of image-based and non-image-based computer-assisted total knee arthroplasty.
abstract: Restoration of the mechanical limb axis and accurate component orientation are two major factors affecting the long-term results after total knee replacement (TKR). Different navigation systems are available to improve the outcome. Image-based systems require pre-operative CT scans, while non-image-based systems gain all necessary information intra-operatively during a registration process. We studied 130 patients who received a TKR either using the CT-based (Knee 1.1) or the CT-free module (CT-free Knee 1.0) of the BrainLAB Vector-Vision Navigation System. Post-operative leg alignment and component orientation was determined on long-leg coronal and lateral X-rays. Sixty of 65 patients in the CT-based group and 63/65 patients in the CT-free group had a post-operative leg axis between 3 degrees varus/valgus. No significant differences were found for varus/valgus orientation of the femoral and tibial components.
authors.affiliation: Department of Orthopaedic Surgery, University of Regensburg, PO Box 100662, 93042 Regensburg, Germany. holger.baethis@klinik.uni-regensburg.de
authors.forename: H
authors.initials: H
authors.lastname: Bäthis
authors.forename: L
authors.initials: L
authors.lastname: Perlick
authors.forename: M
authors.initials: M
authors.lastname: Tingart
authors.forename: C
authors.initials: C
authors.lastname: Lüring
authors.forename: C
authors.initials: C
authors.lastname: Perlick
authors.forename: J
authors.initials: J
authors.lastname: Grifka
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D019645:Arthroplasty, Replacement, Knee; D005260:Female; D006801:Humans; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D007719:Knee Joint / Q000000981:diagnostic imaging* / Q000601:surgery; D008297:Male; D008875:Middle Aged; D018709:Statistics, Nonparametric; D025321:Surgery, Computer-Assisted / Q000379:methods*; D014057:Tomography, X-Ray Computed / Q000379:methods*; D016896:Treatment Outcome