We analyzed the functional outcome of acute treatment for partial ACL tears involving either the anteromedial (AM) or the posterolateral (PL) bundle using suture-repair combined with a bone marrow stimulation (BMS) technique (microperforation). We hypothesized that knee stability could be restored and good functional outcome could be obtained with a simple primary repair technique.
From January 2003 to December 2005, thirteen patients (mean age: 20 years) with partial ACL rupture underwent acute primary ACL repair of the torn ligament. The senior author performed all the surgeries within 2 weeks from injury and all the patients were required to complete a specific rehabilitation protocol. Parameters analysed included the standard knee scales (IKDC, Noyes, Lysholm and Tegner), SANE Score, Computer Knee Laxity Analysis and Deep Flexion Tests. Seven (7) patients had second look arthroscopy after signing an informed consent. The rest conceded to have a post-operative MRI for the re-evaluation of the repaired ACL.
Preliminary Results revealed an average Lysholm score of 84%, Tegner score of 7, Noyes Score of 85% and Subjective score of 76.25%. IKDC score demonstrated that 60% of the patients had normal knee functions while 40% were nearly normal. Pivot shift test was negative and 80% of the patients had less than 3mm anteroposterior laxity.
Based on the preliminary results, primary ACL repair with BMS can lead to favourable results. However, further evaluation is recommended at longer follow-up to validate these findings.
© 2007 Arthroscopy Association of North America. Published by Elsevier Inc. All rights reserved.