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The effects of ACL deficiency on mediolateral translation and varus-valgus rotation.

Publication ,  Journal Article
Li, G; Papannagari, R; DeFrate, LE; Yoo, JD; Park, SE; Gill, TJ
Published in: Acta Orthop
June 2007

BACKGROUND: The anterior cruciate ligament (ACL) constrains the anterior translation and axial rotation of the tibia. However, the effect of ACL injury on the mediolateral translation and varus-valgus rotation of the tibia is unknown. Because of the oblique orientation of the ACL, we hypothesized that ACL deficiency alters mediolateral translation and varus-valgus rotation. METHODS: The kinematics of 9 cadavers from full extension to 90 degrees of flexion under various loading conditions were measured before and after ACL resection using a robotic testing system. RESULTS: ACL deficiency increased the medial translation of the tibia and valgus rotation, especially at 15 degrees and 30 degrees of flexion. For example, at 15 degrees, ACL deficiency increased the medial translation from 1.2 (SD 0.9) mm to 1.8 (SD 1.1) mm in response to a quadriceps load. The valgus rotation also increased from 0.8 degrees (SD 0.6) to 1.7 degrees (SD 0.8). INTERPRETATION: ACL deficiency altered both the mediolateral tibial translation and valgus-varus rotation under various loading conditions. The increased medial tibial translation could shift the contact in the medial compartment towards the medial tibial spine, a region where degeneration is observed in ACL-deficient patients. In addition to restoring anterior laxity, ACL reconstruction might need to restore the mediolateral translation of the tibia and varus-valgus rotation of the knee.

Duke Scholars

Published In

Acta Orthop

DOI

ISSN

1745-3674

Publication Date

June 2007

Volume

78

Issue

3

Start / End Page

355 / 360

Location

Sweden

Related Subject Headings

  • Weight-Bearing
  • Tibia
  • Rotation
  • Robotics
  • Orthopedics
  • Knee Joint
  • Humans
  • Cadaver
  • Biomechanical Phenomena
  • Anterior Cruciate Ligament Injuries
 

Citation

APA
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Li, G., Papannagari, R., DeFrate, L. E., Yoo, J. D., Park, S. E., & Gill, T. J. (2007). The effects of ACL deficiency on mediolateral translation and varus-valgus rotation. Acta Orthop, 78(3), 355–360. https://doi.org/10.1080/17453670710013924
Li, Guoan, Ramprasad Papannagari, Louis E. DeFrate, Jae Doo Yoo, Sang Eun Park, and Thomas J. Gill. “The effects of ACL deficiency on mediolateral translation and varus-valgus rotation.Acta Orthop 78, no. 3 (June 2007): 355–60. https://doi.org/10.1080/17453670710013924.
Li G, Papannagari R, DeFrate LE, Yoo JD, Park SE, Gill TJ. The effects of ACL deficiency on mediolateral translation and varus-valgus rotation. Acta Orthop. 2007 Jun;78(3):355–60.
Li, Guoan, et al. “The effects of ACL deficiency on mediolateral translation and varus-valgus rotation.Acta Orthop, vol. 78, no. 3, June 2007, pp. 355–60. Pubmed, doi:10.1080/17453670710013924.
Li G, Papannagari R, DeFrate LE, Yoo JD, Park SE, Gill TJ. The effects of ACL deficiency on mediolateral translation and varus-valgus rotation. Acta Orthop. 2007 Jun;78(3):355–360.
Journal cover image

Published In

Acta Orthop

DOI

ISSN

1745-3674

Publication Date

June 2007

Volume

78

Issue

3

Start / End Page

355 / 360

Location

Sweden

Related Subject Headings

  • Weight-Bearing
  • Tibia
  • Rotation
  • Robotics
  • Orthopedics
  • Knee Joint
  • Humans
  • Cadaver
  • Biomechanical Phenomena
  • Anterior Cruciate Ligament Injuries