Background: Proximal tibial fractures in elderly patients with osteoporosis or knee osteoarthritis (OA) are challengingcases. In the current study, we present our experience with uncommon acute primary total knee arthroplasty (PTKA)in this patient population.Methods: PTKAs were performed following proximal tibial fractures in 30 consecutive patients over 60 years of agewith osteoporosis or knee...