Purpose: The purpose of this prospective randomized study was to assess biomechanical, radiographic,
and functional results after single-bundle anterior cruciate ligament (ACL) reconstruction
by use of a navigation system. Methods: ACL reconstruction was performed by use of the OrthoPilot navigation system (B. Braun-Aesculap,
Tuttlingen, Germany) in 40 patients (group 1); and in another 40 patients, surgery
was done by the standard manual targeting technique (group 2). The anterior laxity
was measured with a KT-1000 arthrometer (MEDmetric, San Diego, CA). Femoral and tibial
tunnel position was evaluated radiologically according to the method described by
Bernard and Hertel and by Harner et al., respectively. The questionnaire-based Lysholm
and International Knee Documentation Committee scales were included to compare the
functional state in both groups. Results: The knees in group 1 were as stable as those in group 2 during the arthrometer testing,
with a lower value of dispersion. The postoperative Lysholm and International Knee
Documentation Committee scores had the same value in both groups. Statistical differences
existed with regard to anterior-posterior femoral tunnel placement when the navigated
and standard techniques were compared; in the navigated group, more exact results
were found. No significant complications were observed. Conclusions: The only difference that we found between the navigated and standard groups was in
radiographic tunnel position measurement. The computer-assisted navigation technique
in our study resulted in more accurate tunnel placement in the femur (but not the
tibia) than the traditional arthroscopic technique. However, the performed standard
radiographic measurements are of limited precision in principle. Functional scales
and stability tests gave similar results in both groups. Level of Evidence: Level I, therapeutic study.
Key Words
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Article info
Publication history
Published online: February 13, 2008
Footnotes
Supported by grant No. NR/8477-3 from the Ministry of Health of the Czech Republic.
Identification
Copyright
© 2008 Arthroscopy Association of North America. Published by Elsevier Inc. All rights reserved.
