Computer-assisted and conventional total knee replacement: a comparative, prospective, randomised study with radiological and CT evaluation.
After obtaining informed consent, 80 patients were randomised to undergo a navigated or conventional total knee replacement. All received a cemented, unconstrained, cruciate-retaining implant with a rotating platform. Full-length standing and lateral radiographs and CT scans of the hip, knee and ankle joint were carried out five to seven days after operation. No notable differences were found between computer-assisted navigation and conventional implantation techniques as regards the rotational alignment of the femoral or tibial components. Although the deviation from the transepicondylar axis was relatively low, there was a considerable range of deviation for the tibial rotational alignment. There was no statistically significant difference regarding the occurrence pattern of outliers in mechanical malalignment but the number of outliers was reduced in the navigated group.
Lützner
J
J
Department of Orthopaedic Surgery, University Hospital Carl Gustav Carus, Medical Faculty, Technical University of Dresden, Fetscherstrasse 74, D-01307 Dresden, Germany. Joerg.Luetzner@uniklinikum-dresden.de
Krummenauer
F
F
Wolf
C
C
Günther
K-P
KP
Kirschner
S
S
D000368:Aged; D000369:Aged, 80 and over; D019645:Arthroplasty, Replacement, Knee / Q000379:methods*; D017760:Bone Malalignment / Q000000981:diagnostic imaging / Q000517:prevention & control; D005260:Female; D006801:Humans; D007719:Knee Joint / Q000000981:diagnostic imaging / Q000601:surgery; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications / Q000000981:diagnostic imaging / Q000517:prevention & control; D011446:Prospective Studies; D016059:Range of Motion, Articular / Q000502:physiology; D013223:Statistics as Topic; D025321:Surgery, Computer-Assisted / Q000379:methods*; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome