A tibial prosthesis (120) comprises a medial base portion (121a) configured to engage a medial surface of a tibia (101) and a lateral base portion (121b) configured to engage a lateral surface of the tibia. At least a portion of the medial and lateral base portions are separated by a passage (138) interposed therebetween. The tibial prosthesis also comprises a bridge (125) coupling the medial base portion and the lateral base portion, wherein at least a portion of the bridge is elevated above a portion of the passage between the medial base portion and the lateral base portion. The bridge may define an underlying area that receives at least a portion of a tibial eminence when the tibial prosthesis is engaged with the tibia, wherein the height of the bridge varies in a superior direction across the passage.
