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- W1987773485 abstract "In the last 30 years, prosthetic knee surgery has undergone significant improvement of design, materials, and surgical techniques and gives better results at follow-up examinations. Several studies have shown implant survival rates higher than 90% at 10 to 15 years of follow-up. Good results in knee prosthesis depend on various factors: selection of patients and knee prosthesis, surgical techniques, and postoperative management. If we focus our attention on the surgical technique, the literature clearly shows that the quality of the positioning of the systems represents the most important factor. Analyzing the results of 115 knee prosthesis, Jeffery et al found a 24% component loosening when the mechanical axis of the inferior limb was more than 3 degrees in varus/ valgus alignment against a rate of 3% when the mechanical axis was contained within these values. Although knee prosthesis alignment systems and cutting guides are in continuous evolution, it has been shown that an error of up to 3 degrees in alignment can be observed in 10% of the implants, even when performed by expert surgeons. The cause of that depends on the difficulty in finding some important points of reference, such as the hip center, the ankle center, the femoral epicondyles, and so on. Navigation systems compensate for the deficiencies of the standard cutting guides, thus reducing the rate of implant misalignment. Extended surgical time, difficulties to define some anatomical landmarks, and the difficult execution of a correct ligament balancing are probably some reasons why the spread of these navigation systems has been slow. The authors introduce a new simplified navigation system, fastNav, that through a balanced integration between traditional surgery and computer-assisted surgery, reduces surgical times significantly while preserving femoral and tibial resection monitoring. The surgeon is free to determine component rotations and ligament balancing by using traditional techniques." @default.
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- W1987773485 date "2009-09-01" @default.
- W1987773485 modified "2023-09-24" @default.
- W1987773485 title "Computer-Assisted Surgery With fastNav System for Knee Arthroplasty" @default.
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- W1987773485 doi "https://doi.org/10.1097/btk.0b013e3181a7e851" @default.
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