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Related Experiment Video

Updated: Jun 16, 2026

A Mini-Invasive Internal Fixation Technique for Studying Immobilization-Induced Knee Flexion Contracture in Rats
05:34

A Mini-Invasive Internal Fixation Technique for Studying Immobilization-Induced Knee Flexion Contracture in Rats

Published on: May 20, 2019

[Comparative study after hamstring ACL plasty with RigidFix (pin fixation) and EndoButton (anchor fixation)].

E Basad1, A Kipper, O A Wüsten

  • 1Klinik und Poliklinik für Orthopädie und Orthopädische Chirurgie, Universitätsklinikum Giessen und Marburg, Standort Giessen. erhan.basad@ortho.med.unigiessen.de

Zeitschrift Fur Orthopadie Und Unfallchirurgie
|February 23, 2010
PubMed
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This summary is machine-generated.

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This study compared RigidFix (RF) and EndoButton (EB) hamstring fixation techniques. Both methods showed comparable clinical outcomes and no tunnel widening at 12 months post-surgery.

Area of Science:

  • Orthopedic Surgery
  • Sports Medicine
  • Biomedical Engineering

Background:

  • Hamstring injuries are common in athletes, requiring surgical repair.
  • Graft fixation is crucial for successful hamstring reconstruction outcomes.
  • Comparing different fixation techniques, such as RigidFix (RF) and EndoButton (EB), is essential for optimizing surgical procedures.

Purpose of the Study:

  • To compare the clinical and radiological outcomes of two hamstring fixation techniques: pin fixation with RigidFix (RF) and anchor fixation with EndoButton (EB).
  • To evaluate graft stability, patient-reported outcomes, and potential complications like femoral tunnel widening and reflux associated with each fixation method.

Main Methods:

  • A prospective case group study involving 67 patients undergoing hamstring reconstruction.

Related Experiment Videos

Last Updated: Jun 16, 2026

A Mini-Invasive Internal Fixation Technique for Studying Immobilization-Induced Knee Flexion Contracture in Rats
05:34

A Mini-Invasive Internal Fixation Technique for Studying Immobilization-Induced Knee Flexion Contracture in Rats

Published on: May 20, 2019

  • Patients were divided into two groups: EndoButton (EB) juxta-articular fixation (N=21) and RigidFix (RF) ab-articular fixation (N=46).
  • Clinical outcomes were assessed using KT-1000 stability, IKDC, Lysholm, and Tegner scores. MRI was used to evaluate femoral tunnel widening and reflux at preoperative, 6-month, and 12-month follow-ups.

    • Main Results:

    • The RigidFix (RF) group demonstrated slightly better KT-1000 stability at 6 months (p=0.044), but outcomes equalized by 12 months.
    • Tegner, Lysholm, and IKDC scores were comparable between the EB and RF groups at both 6 and 12 months.
    • No significant femoral tunnel widening was detected in either group, and femoral reflux resolved by 12 months in the EB group.

    Conclusions:

    • Both RigidFix (RF) and EndoButton (EB) hamstring fixation techniques provide comparable clinical outcomes and graft stability at 12 months post-surgery.
    • Neither technique resulted in detectable tunnel widening, suggesting both are safe options for hamstring reconstruction.
    • The choice between RF and EB fixation may depend on surgeon preference and specific patient factors, as both demonstrate effective long-term results.