Inclusion Criteria:  Patients who underwent an isolated Anterior Cruciate Ligament (ACL) reconstruction or a combined ACL and anterolateral ligament reconstruction (Extra Articular Plasty) between January 1, 2011 and March 31, 2012. Patients affiliated or beneficiaries of a social security scheme Patients who have given their express consent.  Exclusion Criteria:  Patients with pediatric ACL reconstruction technique Patients with a complex associated gesture such as osteotomy or ligamentoplasty other than extra articular plastic surgery. Contraindication to a radio control (pregnancy) Patient's refusal to participate in the study Protected patients: Adults under guardianship, curatorship or other legal protection, deprived of their liberty by judicial or administrative decision; Pregnant, breastfeeding or parturient woman; Hospitalized without consent.