Injurys to the posterolateral corner are complex and only in the recent years, with the better understanding of the anatomy and biomehanics, we have more success in their treatment and functional outcome. The main stabilizers of posterolateral corner are the lateral collateral ligament, the popliteus tendo and the popliteofibular ligament. In order to treat these injurye ssuccessfully it is necessary to recognize the correct diagnosis which can be achieved by clinical tests that include the varus stress test at 0 and 30, the dial test at 30 and 90, the external rotation recurvatum test, the posterolatelar drower test, the reverse pivot shift test, the standing recurvatum test and the evaluation varus thrust gait. Injuries to the posterolateral corner Grade III have the best outcome with the operative treatment which can be primary repair or rconstruction, and the reconstruction tehnique can be anatomic or nonanatomic. The development of these anatomic tehnique and operative instruments unabled stronger and more stable grafts that also early intervention in rehabilitation. Current protocol after the reconstruction of the posterolateral corner encouraged early mobilization, a shorter period of nonweight bearing and the application of therapeutic modalities with the purpose of better recovery and functional outcome. The patients who wants to continue with strenuous sports activities have to go through a rehabilitaion program of conditioning and strenghtning, and the criteria for release from hospital is based on patients symptoms, lateral join opening and functional goals.