TIBIAL PROSTHESIS WITH DISTAL FEATURES FOR NON-CEMENTED FIXATION

The techniques described herein relate to a tibial prosthesis for a knee arthroplasty including a baseplate (100) and a tibial keel (108). The baseplate includes a distal surface (104) sized and shaped to substantially cover a proximal resected surface of a tibia; a proximal surface (102) opposite the distal surface, the proximal surface having a lateral compartment (116) and a medial compartment (114) opposite the lateral compartment; a periphery (106) extending between the distal surface and the proximal surface; a first layer of porous material (152) forming at least a majority of the distal surface and extending to the periphery; and a second layer of nonporous or relatively less porous material (154) having a plurality of reference features (124A-F) extending through the first layer, wherein the plurality of reference features form at least a portion of the distal surface; and a tibial keel extending distally from the distal surface to define a longitudinal tibial keel axis (S1).