Dan Ionuţ Cosma1, Andrei Corbu2. 1. Department of Orthopaedics, Traumatology and Paediatric Orthopaedics, University of Medicine and Pharmacy "Iuliu Hatieganu" Cluj-Napoca, 46-50 Viilor St., Cluj-Napoca, Romania. dcosma@umfcluj.ro. 2. Department of Orthopaedics, Traumatology and Paediatric Orthopaedics, University of Medicine and Pharmacy "Iuliu Hatieganu" Cluj-Napoca, 46-50 Viilor St., Cluj-Napoca, Romania.