Grimberg AW, Grupp TM, Elliott J, et al. - The influence of ceramic bearing surface coatings on the outcome in cemented primary total knee arthroplasty (TKA) was explored in this premier registry-based study. Researchers included 117,660 cemented primary total knee arthroplasties (TKAs) in patients with primary osteoarthritis in the German arthroplasty registry since 2012 and were followed up for a maximum of 3 years. The primary outcome included the risk of revision for Prosthetic joint infection (PJI) on ceramic coated and uncoated cobalt-chromium-molybdenum femoral components. They conducted propensity score matching 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 reduced risk for PJI due to ceramic-coated implants in cemented primary TKA. Future trial for revision reasons other than PJI is needed.