Economics of Orthopaedic Infections: A Bottomless Pit -- Updated Animal Models in Orthopaedics Research -- Fractures and Complications Related To Osteoporosis -- RSA Studies in Implant Research -- Instability of the Ankle -- SCFE: Surgical Options -- Proximal Humerus Fractures in Children and Adolescents -- Pelvic Reconstruction in Oncology -- Knee Injuries in Children -- Prevention of Deep Infection in THA -- Revision in Metal-On-Metal THA: Current Knowledge -- Treatment of PJI -- Microbiology/Biofilm/Antibiotics for Dummies -- Diagnostics In PJI -- Patello-Femoral Prosthesis -- Perioperative Management in TKR -- The Role of THR in Patients with Concomitant Back Pain -- Distal Radius Fractures: Indication for Plate Fixation -- Treatment of Fragility Fractures in the Upper Extremity -- Extra capsular Proximal Femur Fractures: Indications for (Primary) Arthroplasty.