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Related Experiment Videos

Double-bundle ACL reconstruction can improve rotational stability.

Masayoshi Yagi1, Ryosuke Kuroda, Kouki Nagamune

  • 1Department of Orthopaedic Surgery, Hyogo College of Medicine, Nishinomiya, Japan. mayagi@md.neweb.ne.jp

Clinical Orthopaedics and Related Research
|November 9, 2006
PubMed
Summary

Double-bundle anterior cruciate ligament (ACL) reconstruction offers superior rotational stability compared to single-bundle techniques. This study found double-bundle ACL reconstruction improved pivot shift control in patients one year post-surgery.

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Area of Science:

  • Orthopedic Surgery
  • Sports Medicine
  • Biomechanics

Background:

  • Anterior cruciate ligament (ACL) injuries are common in athletes.
  • Double-bundle ACL reconstruction theoretically improves rotational stability over single-bundle methods.
  • Clinical evidence supporting double-bundle ACL reconstruction's superiority is limited.

Purpose of the Study:

  • To compare the clinical effectiveness of double-bundle versus single-bundle ACL reconstruction techniques.
  • To evaluate rotational stability and knee laxity after different ACL reconstruction methods.

Main Methods:

  • Sixty patients underwent ACL reconstruction using one of three techniques: double-bundle, anteromedial single-bundle, or posterolateral single-bundle.
  • Hamstring tendons were used as free grafts for all reconstructions.

Related Experiment Videos

  • Rotational stability was assessed using a 3D electromagnetic sensor system during pivot shift tests; anteroposterior laxity was measured with a KT-1000 arthrometer.

    • Main Results:

    • No significant differences in anteroposterior laxity (KT-1000) were observed among the three groups.
    • The double-bundle ACL reconstruction group demonstrated significantly better control of rotational instability (pivot shift) compared to single-bundle groups.
    • Advanced 3D electromagnetic sensor measurements revealed differences not apparent with standard clinical evaluations.

    Conclusions:

    • Double-bundle ACL reconstruction provides superior control of complex rotational instability compared to single-bundle techniques.
    • While standard laxity tests show no difference, advanced biomechanical assessment highlights the benefits of double-bundle ACL reconstruction.
    • This suggests double-bundle ACL reconstruction may be advantageous for restoring knee stability, particularly in controlling rotational torque.