67 patients scheduled for total knee arthroplasty were randomized to receive either a monoblock or modular tibial component. Patients were assessed for component migration over the first 24 months postoperatively, as well as clinical scores in the same time frame. Results demonstrated significantly lower maximum total point motion in the monoblock group compared to the modular group after 24 months. As well, single dimension migration demonstrated significantly lower subsidence in the monoblock group compared to the modular group. Clinical scores did not significantly differ between groups.