Abstract
A new generation of implantation instruments were developed for quadriceps sparing surgical approaches during total knee arthroplasty (TKA). There is little information on the accuracy of the bone cuts performed with the side-cutting technique. A total of 100 patients were randomized to undergo computer-assisted TKA or non-navigated TKA using a mini-subvastus surgical approach and side-cutting implant instrumentation. The radiographic parameters, clinical outcomes and knee scores were evaluated 3 months postoperative. The mechanical axis of the limb was within 3° varus/valgus in 76% of the patients who had navigated procedures versus 66% of patients who had conventional surgery. The tibial slope showed a rate of inaccuracy of 3° or less for 78% of the patients in the navigated total knee arthroplasty group versus 66% of the patients in the conventional group. Clinical outcomes and knee scores were similar in both groups. The navigation technique could not compensate for shortcomings of the implantation instruments.
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We declare that the study complies with the current laws of Austria and the United States of America. Each author certifies that his institution has approved the human protocol for this investigation and that all investigations were conducted in conformity with ethical principles of research, and that informed consent was obtained.
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Martin, A., Sheinkop, M.B., Langhenry, M.M. et al. Accuracy of side-cutting implantation instruments for total knee arthroplasty. Knee Surg Sports Traumatol Arthrosc 17, 374–381 (2009). https://doi.org/10.1007/s00167-008-0704-x
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DOI: https://doi.org/10.1007/s00167-008-0704-x