Grimberg AW, Grupp TM, Elliott J, et al. - A premier registry-based study was performed to investigate the influence of ceramic bearing surface coatings on the outcome in cemented primary total knee arthroplasty (TKA). Researchers recorded 117,660 cemented primary TKAs in patients with primary osteoarthritis in the German arthroplasty registry since 2012 and were followed up for a maximum of three years. The primary outcome included the risk of revision for prosthetic joint infection (PJI) on ceramic coated and uncoated CoCrMo femoral components. They conducted propensity score matching (PSM) for age, gender, obesity, diabetes mellitus, depression, and Elixhauser comorbidity index, and substratification on common design twins with and without coating. There was no evidence of decreased risk for PJI due to ceramic coated implants in cemented primary TKA. Future study for revision reasons other than PJI is needed.