A tibial implant apparatus includes a tibial plate having a medial-lateral width, and includes a generally keel-like base extending from the tibial plate. The base has a medial-lateral span within a range of about 0.6-0.9 times the width of the tibial plate. A tibial implant apparatus includes a tibial plate, a base extending from the tibial plate, and an elongated member. The elongated member includes a first portion and a second portion, and is removably attached to the base. The tibial plate and the base cooperatively define a through-channel. The elongated member is inserted superiorly into the through-channel such that the first portion of the elongated member is retained within the through-channel and the second portion of the elongated member protrudes out of the through-channel and extends inferiorly away from the base. A method for anchoring an implant in a proximal tibia is also provided.