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Three-dimensional analysis of image-free navigation system for total knee arthroplasty

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MUSCULOSKELETAL SURGERY Aims and scope Submit manuscript

Abstract

Malalignment causes abnormal forces that may lead to loosening after knee replacement. Whether a computer-assisted technique can improve the precision of implant positioning guaranteeing good long-term results in total knee arthroplasty, this is a matter of discussion. The authors evaluate the alignment accuracy of 20 primary total knee arthroplasties, performed using an image-free computer navigation systems, with standardized CT protocol and three-dimensional digital model reconstruction. The results of this study demonstrate that the image-free navigation system is able to improve accuracy in axial limb alignment and positioning of the components in the majority of cases; moreover, the difference between the mean mechanical axis value of the navigation system (179.7° ± 1.7°) and the median mean value obtained during the post-operative evaluation (180.3° ± 1.9°) is not statistically significant (P = 0.28).

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Acknowledgments

The authors did not receive any outside funding or grants in support of their research for or preparation of this work.

Conflict of interest

The authors declare that they have no conflict of interest related to the publication of this manuscript.

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Authors and Affiliations

  1. VII Department of Orthopaedic Surgery, Rizzoli Orthopaedic Institute, University of Bologna, Via Pupilli 1, 40136, Bologna, Italy

    D. Tigani, P. Trentani & L. Amendola

  2. Department of Radiology, Rizzoli Orthopaedic Institute, Bologna, Italy

    E. Rimondi

  3. Medical Technology Laboratory, Rizzoli Orthopaedic Institute, Bologna, Italy

    M. Ansaloni & D. Testi

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  1. D. Tigani
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  2. E. Rimondi
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  3. P. Trentani
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  4. M. Ansaloni
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  5. L. Amendola
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  6. D. Testi
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Correspondence to L. Amendola.

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Tigani, D., Rimondi, E., Trentani, P. et al. Three-dimensional analysis of image-free navigation system for total knee arthroplasty. Musculoskelet Surg 95, 81–87 (2011). https://doi.org/10.1007/s12306-010-0090-7

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  • DOI: https://doi.org/10.1007/s12306-010-0090-7

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