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Calcium phosphate-hybridized tendon grafts reduce femoral bone tunnel enlargement in anatomic single-bundle ACL reconstruction

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

Abstract

Purpose

This study aimed to clarify the effect of calcium phosphate (CaP)-hybridized tendon grafting versus unhybridized tendon grafting on the morphological changes to the bone tunnels at the aperture 1 year after anatomic single-bundle anterior cruciate ligament (ACL) reconstruction.

Methods

Seventy-three patients were randomized to undergo the CaP (n = 37) or the conventional method (n = 36). All patients underwent computed tomography (CT) evaluation 1 week and 1 year post-operatively. The femoral and tibial tunnels at the aperture were evaluated on reconstructed 3D CT images. Changes in the cross-sectional area (CSA) and diameters of the femur and the tibia, and the translation rate of the tunnel walls and the morphological changes of both tunnels were assessed.

Results

There was a significant reduction in the increase in the CSA and the anterior–posterior and proximal–distal tunnel diameters on the femoral side in the CaP group as compared with the conventional group. On the femoral side, the translation rate of the posterior wall was significantly larger in the CaP group than in the conventional group, whereas the translation rate of the distal wall was significantly smaller in the CaP group than in the conventional group.

Conclusions

As compared with the conventional method, the CaP-hybridized tendon graft reduced bone tunnel enlargement on the femoral side 1 year after anatomic single-bundle ACL reconstruction due to an anterior shift of the posterior wall and reduced distal shift in the femoral bone tunnel. Clinically, the CaP-hybridized tendon grafts can prevent femoral bone tunnel enlargement in anatomic single-bundle ACL reconstruction.

Level of evidence

I.

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Authors and Affiliations

  1. Department of Orthopaedic Surgery, Ibaraki Prefectural University of Health Sciences, 4669-2 Ami Ami-machi, Inashiki-gun, Ibaraki, 300-0394, Japan

    Hirotaka Mutsuzaki

  2. Department of Orthopaedic Surgery, Ichihara Hospital, 3681 Oozone, Tsukuba, Ibaraki, 300-3295, Japan

    Tomonori Kinugasa & Kotaro Ikeda

  3. Department of Orthopaedic Surgery, Tsukuba Gakuen Hospital, 2573-1 Kamiyokoba, Tsukuba, Ibaraki, 305-0854, Japan

    Masataka Sakane

Authors
  1. Hirotaka Mutsuzaki
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  2. Tomonori Kinugasa
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  3. Kotaro Ikeda
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  4. Masataka Sakane
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Corresponding author

Correspondence to Hirotaka Mutsuzaki.

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Conflict of interest

The authors declare that they have no competing interests.

Funding

This work was supported by the Japan Sports Medicine Foundation, 2015.

Ethical approval

The Ethics Committee of Ichihara Hospital reviewed and approved the study (ID number of the approval: 1101).

Informed consent

Informed consent was obtained from the patients enrolled.

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Mutsuzaki, H., Kinugasa, T., Ikeda, K. et al. Calcium phosphate-hybridized tendon grafts reduce femoral bone tunnel enlargement in anatomic single-bundle ACL reconstruction. Knee Surg Sports Traumatol Arthrosc 26, 500–507 (2018). https://doi.org/10.1007/s00167-017-4657-9

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  • DOI: https://doi.org/10.1007/s00167-017-4657-9

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