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Related Experiment Videos

Muscle strength evaluations after ACL reconstruction.

A-S Moisala1, T Järvelä, P Kannus

  • 1Medical School, Tampere University, Tampere, Finland. anna-stina.moisala@uta.fi

International Journal of Sports Medicine
|March 16, 2007
PubMed
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Long-term muscle strength after anterior cruciate ligament (ACL) reconstruction is comparable between bone-patellar tendon-bone (BTB) and hamstring autografts. Good knee stability and longer follow-up correlate with better muscle strength, supporting active rehabilitation.

Area of Science:

  • Orthopedic Surgery
  • Sports Medicine
  • Biomechanical Engineering

Background:

  • Anterior cruciate ligament (ACL) reconstruction is a common orthopedic procedure.
  • Graft choice, such as bone-patellar tendon-bone (BTB) versus hamstring autograft, may influence long-term outcomes.
  • Understanding long-term muscle strength is crucial for patient recovery and return to activity.

Purpose of the Study:

  • To compare quadriceps and hamstring muscle strength between BTB and hamstring autograft groups 4-7 years post-arthroscopic ACL reconstruction.
  • To investigate factors influencing muscle strength, including knee stability and follow-up duration.
  • To assess the association between muscle strength and functional knee outcomes.

Main Methods:

  • Isokinetic testing was used to assess quadriceps and hamstring muscle strength.

Related Experiment Videos

  • Clinical evaluation and instrumented assessment of knee laxity were performed.
  • Lysholm knee scores were used to evaluate functional outcomes.

    • Main Results:

    • No significant differences in quadriceps or hamstring muscle strength deficits were found between the BTB and hamstring autograft groups.
    • Muscle strength was positively associated with longer follow-up periods and knee stability.
    • Greater strength deficits correlated with lower Lysholm knee scores.

    Conclusions:

    • Both BTB and hamstring autografts provide comparable long-term muscle strength after ACL reconstruction.
    • Muscle strength in the operated limb is positively associated with functional knee outcomes.
    • Active rehabilitation programs are supported for optimizing recovery after ACL reconstruction.