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Am J Sports Med. 2004 Jun;32(4):975-83.

Abnormal rotational knee motion during running after anterior cruciate ligament reconstruction.

Author information

  • 1Bone and Joint Center, ER2015, Henry Ford Health System, Detroit, MI 48202, USA. tashman@bjc.hfh.edu

Abstract

BACKGROUND:

The effectiveness of anterior cruciate ligament reconstruction for restoring normal knee kinematics is largely unknown, particularly during sports movements generating large, rapidly applied forces.

HYPOTHESIS:

Under dynamic in vivo loading, significant differences in 3-dimensional kinematics exist between anterior cruciate ligament-reconstructed knees and the contralateral, uninjured knees.

STUDY DESIGN:

Prospective, in vivo laboratory study.

METHODS:

Kinematics of anterior cruciate ligament-reconstructed and contralateral (uninjured) knees were evaluated for 6 subjects during downhill running 4 to 12 months after anterior cruciate ligament reconstruction, using a 250 frame/s stereoradiographic system. Anatomical reference axes were determined from computed tomography scans. Kinematic differences between the uninjured and reconstructed limbs were evaluated with a repeated-measures analysis of variance.

RESULTS:

Anterior tibial translation was similar for the reconstructed and uninjured limbs. However, reconstructed knees were more externally rotated on average by 3.8 +/- 2.3 degrees across all subjects and time points (P =.0011). Reconstructed knees were also more adducted, by an average of 2.8 +/- 1.6 degrees (P =.0091). Although differences were small, they were consistent in all subjects.

CONCLUSIONS:

Anterior cruciate ligament reconstruction failed to restore normal rotational knee kinematics during dynamic loading.

CLINICAL RELEVANCE:

Although further study is required, these abnormal motions may contribute to long-term joint degeneration associated with anterior cruciate ligament injury/reconstruction.

PMID:
15150046
[PubMed - indexed for MEDLINE]
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