Abstract: This invention provides a tibial prosthesis for use during a total knee arthroplasty procedure which includes a modular tibial component comprising an in-bone anchorage assembly to which is removably attached a tibial tray adapted to receive and retain a variety of femoral components or bearing inserts. Removal of the tray permits access to the interface between the bone and anchorage assembly in the event removal or revision are necessary. In preferred embodiments, the invention affords hybrid fixation of the tibial prosthesis in that bone cement for immediate fixation and adaptation for longer term bone ingrowth are featured.