J Korean Knee Soc.  2009 Mar;21(1):8-14.

Comparative Study of the In Vivo Stability between a Stable Knee and an Anterior Cruciate Ligament Injured Knee with Using a Navigation System

• Park SJ
• Song EK
• Seon JK
• Hur CI
• Park GH

Abstract

PURPOSE
We compared the anteroposterior translation and the internal-external rotation of the tibia in stable knees without an anterior cruciate ligament (ACL) injury with those of ACL injured knees by using a navigation system and we report the objective data.
MATERIALS AND METHODS
Forty-four patients who were treated for a meniscal tear without ACL injury were allocated to the stable group, and 41 patients were allocated to the ACL injury group. The anteroposterior displacement and the rotation of the knees were measured in 0, 30, 60 and 90 degrees of flexion with using the Orthopilot(R) navigation system.
RESULTS
The mean total rotation values were 18.8degrees+/-4.5degrees, 31.4degrees+/-4.2degrees, 30.1degrees+/-5.1degrees and 29.2degrees+/-5.9degrees at 0, 30, 60 and 90 degrees of flexion, respectively, in the stable group and 22.7degrees+/-6.9degrees, 37.6degrees+/-5.8degrees, 34.0degrees+/-9.4degrees and 31.8degrees+/-8.8degrees at 0, 30, 60 and 90 degrees of flexion, respectively, in the ACL injury group.
CONCLUSION
The quantitative values for anteroposterior translation and rotations of stable and ACL injured knee were obtained using a navigation system.

Keyword

Knee; Stability measurement; Navigation system

MeSH Terms

Anterior Cruciate Ligament
Displacement (Psychology)
Humans
Knee
Tibia