This prospective comparative study was performed at two centers in 2012. Each center performed one procedure so this study was observational. All patients with a chronic anterior instability requiring bone grafting (Instability Severity Index Score>3) were included. The Latarjet procedure was performed by mini-open approach (set Arthrex, Naples, FL) in the first group, and by arthroscopic approach (set Depuy-Mitek, Raynham, MA) in the second group. The analgesic postoperative protocol was standardized (paracetamol, non-steroidal anti-inflammatory, tramadol).