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Influence of tibial hybrid fixation on graft tension and stability in ACL double-bundle reconstruction

  • Arthroscopy and Sports Medicine
  • Published:
Archives of Orthopaedic and Trauma Surgery Aims and scope Submit manuscript

Abstract

Purpose

Initial graft tension in anterior cruciate ligament (ACL) reconstruction affects stability and tension loss at follow-up. This study investigated the influence of hybrid tibial fixation in 3-tunnel double-bundle ACL reconstruction on initial graft tension and tension change and stability under anterior and combined rotatory loads.

Methods

Eleven fresh-frozen cadaveric knees were reconstructed with an ACL double bundle using a 3-tunnel technique. Grafts were tightened to 80 N in 60° (AM bundle) and 15° (PL bundle) of flexion. Anterior tibial translation under 134 N of anterior shear load and translation under combined rotatory and valgus loads (10 Nm valgus stress, 4 Nm internal tibial torque) were determined at 0°, 30°, 60°, and 90° flexion. In addition, graft tension under continuous passive motion was determined. Intact, ACL-resected and ACL-reconstructed joints with either tibial extracortical graft fixation or extracortical plus supplemental aperture graft fixation (hybrid fixation) were tested.

Results

Hybrid fixation did not increase graft tension in either bundle during fixation or in motion without additional load. AM-bundle tension increased (p < 0.05) at 0° under combined rotatory and valgus loads and at 30° and 60° under both loading conditions without decreasing the anterior tibial translation. PL-bundle tension increased (p < 0.05) only at 90° under combined rotatory and valgus loads.

Conclusions

Tibial hybrid fixation in 3-tunnel double-bundle ACL reconstruction increases time-zero AM- and PL-bundle tensions under loading conditions, generating greater construct stiffness. This could lead to a longer preservation of ACL-graft stability in clinical follow-up before bony incorporation.

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Acknowledgements

This study was funded by the Alwin-Jäger-Foundation. The instruments for the surgical preparation were sponsored by Arthrex (Freiham, Germany). All authors declare that there is no conflict of interest. The authors thank Alain Olivier for the graphic design.

Author information

Authors and Affiliations

  1. Department for Orthopedic Trauma, Hand and Reconstructive Surgery, Center of Surgery, University of Ulm, Albert-Einstein-Allee 23, 89081, Ulm, Germany

    B. H. Drews

  2. Trauma Research Center, Institute of Orthopedic Research and Biomechanics, University of Ulm-Medical Center, Helmholtzstraße 14, 89081, Ulm, Germany

    A. Seitz, A. Ignatius & L. Dürselen

  3. Sportklinik Stuttgart GmbH, Taubenheimstraße 8, 70734, Stuttgart, Germany

    J. Huth & G. Bauer

Authors
  1. B. H. Drews
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  2. A. Seitz
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  4. G. Bauer
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  5. A. Ignatius
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  6. L. Dürselen
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Correspondence to B. H. Drews.

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The authors declare that they have no conflict of interest.

Funding

This study was funded by the Alwin-Jäger-Foundation. The instruments for the surgical preparation were sponsored by Arthrex (Freiham, Germany).

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This article does not contain any studies with human participants or animals performed by any of the authors.

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Drews, B.H., Seitz, A., Huth, J. et al. Influence of tibial hybrid fixation on graft tension and stability in ACL double-bundle reconstruction. Arch Orthop Trauma Surg 137, 981–988 (2017). https://doi.org/10.1007/s00402-017-2698-7

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  • DOI: https://doi.org/10.1007/s00402-017-2698-7

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