O1023 NAVIGATION IN TOTAL KNEE ARTHROPLASTY – A COMPARATIVE MULTICENTRE STUDY OF CONVENTIONAL AND COMPUTERIZED IMPLANTATION TECHNIQUE

Background: The aim of introduction of navigation in knee arthroplasty was to further contribute to precision of endoprosthetic alignment. Methods and material: A multicentre comparative study was conducted including 821 patients. The SEARCH knee system was used throughout the series. 555 TKA’s were implanted with the use of a navigation system (OrthoPilot) and 266 cases were operated using manual instrumentation. Alignment was radiographically evaluated at the three months follow-up with respect to mechanical axis and femoral and tibial axes using one-leg stance x-rays and standardized lateral radiographs. Results: The summarized results of the series are shown in the table below. The chi-square test was applied for the statistical analysis. Conclusions: Endoprosthetic alignment using the navigation system was superior to manual implantation technique on the average with respect to all parameters. Results were more consistent on the tibial side. The navigation system proved to be reliable. The overall results justify the further use and development of navigation tools in knee arthroplasty.