A multicenter prospective comparative study was conducted in 2012. Each center performed a specific ligamentoplasty technique: two used retrograde and the other antegrade tibial tunnel drilling. Peri- and postoperative analgesia and systematic early postoperative magnetic resonance imaging (MRI) protocols were standardized. The main assessment criterion was tibial subchondral lesions (microfractures or bone oedema) on MRI during the first postoperative week