Level of evidence:
knee arthroplasty, TKA
Therapeutic Although cemented fixation of an implant is predominantly used, the use of primary cementless total knee arthroplasty (TKA) continues to growExcellent clinical outcomes at short-term and midterm follow-up have been described for cementless 3D-printed TKA implants with highly porous titanium, but it may take a longer time before problems with a particular device are shown in clinical outcomesThis paper aims to compare tibial implant migration for up to 5 years postoperatively between the cementless 3D-printed TKA implant and its cemented counterpart, with a particular focus on the progression in migration beyond 2 years. We assessed whether implant migration was progressive over time or whether continuous stabilization was achieved after the initial “settling phase.” Our hypothesis was that both the cementless and cemented tibial components have no progression in migration beyond 2 years.