MRI evaluation of the knee post double bundle ACL reconstruction: Association of graft findings and comparison with arthroscopy

PurposeTo determine the association of graft complications after anterior cruciate ligament reconstruction using double bundle graft by magnetic resonance imaging using arthroscopy/surgery as a gold standard.Patient and methodsA total of 126 patients (130 knees) with complete ACL tears were recruited for this prospective study, and all patients subsequently underwent an MRI examination to evaluate graft integrity and signal intensity.ResultsOut of 130 knees with ACL reconstruction, partial tears of the AM bundle were seen in 25 knees (19.2%) and complete tear of the AM bundle was seen in 26 (20%). Partial tears of the PL bundle were seen in 35 knees (26.9%), and complete tears of the PL bundle in 31 knees (23.8%). These patients’ signs of instability were noted in 2 patients with partial tear of PL bundle and in 9 patients with complete tear of PL bundle.ConclusionIncreased signal intensity within the anteromedial or posterolateral bundles of a double bundle ACL reconstruction is frequently associated with a partial tear. Impingement of the anteromedial graft is frequently associated with partial tear and increased signal intensity which is proved by arthroscopy/surgery. A low incidence of other complications is seen.