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Femoral rotation in total knee arthroplasty: a comparison of patient individualized jigs with gap balancing in relation to anatomic landmarks

  • Knee
  • Published:
Knee Surgery, Sports Traumatology, Arthroscopy Aims and scope

Abstract

Purpose

The purpose of our study was to compare the accuracy of the rotational position of the femoral component in total knee arthroplasty aligned with patient individualized jigs (PSJ) to a gap balancing technique (GBT).

Methods

A consecutive series of 21 osteoarthritic patients were treated with 22 cruciate-retaining total knee prostheses. During surgery, the rotation of the femoral component pinholes was recorded for all knees using PSJ and GBT and transferred to computer tomograms (CT). The rotational differences between PSJ and GBT relative to the transepicondylar axis were analysed.

Results

The medium rotation of the femoral component pinholes was 1.3° ± 5.1° (min = −6.3°; max = 14.4°) for PSJ and 0.1 ± 1.4° (min = −1.6°; max = 3.4°) for GBT. Outliers of more than 3° were found more frequently with PSJ in 12 cases but only in one for GBT.

Conclusion

Based on our study, we would not recommend relying intra-operatively solely on the CT-based PSJ without the option to adjust or control femoral rotation.

Level of evidence

II.

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Authors and Affiliations

  1. Department of Orthopaedic Surgery, Brigham and Women’s and Brigham Faulkner Hospital, 850 Boylston Street, Chestnut Hill, MA, 02467, USA

    W. Fitz

  2. Laboratory of Biomechanics and Implant Research, Department of Orthopaedics, Trauma Surgery and Spinal Cord Injury, Heidelberg University Hospital, Schlierbacher Landstr. 200A, 69118, Heidelberg, Germany

    S. Jäger, J. S. Rieger & R. G. Bitsch

  3. Research Centre for Experimental Orthopaedics, Heidelberg University Hospital, Schlierbacher Landstr. 200A, 69118, Heidelberg, Germany

    E. Seebach

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  1. W. Fitz
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  2. S. Jäger
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  3. J. S. Rieger
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  4. E. Seebach
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  5. R. G. Bitsch
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Correspondence to R. G. Bitsch.

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Fitz, W., Jäger, S., Rieger, J.S. et al. Femoral rotation in total knee arthroplasty: a comparison of patient individualized jigs with gap balancing in relation to anatomic landmarks. Knee Surg Sports Traumatol Arthrosc 25, 1712–1719 (2017). https://doi.org/10.1007/s00167-015-3836-9

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  • DOI: https://doi.org/10.1007/s00167-015-3836-9

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