Femoral implant

A bone implant apparatus, comprising:

• a proximal end portion;
• a central tapered body defined by a proximal tapered portion and a distal end tapered portion, the proximal tapered portion and distal end tapered portion forming one contiguous tapered shape;
• and
• a circumferential collar between the proximal end portion and the distal end tapered portion of the central tapered body, the circumferential collar comprising a proximal surface and a substantially spherical distal surface;
• wherein the proximal tapered portion of the central tapered body extends from the collar toward the distal end tapered portion,
• wherein the proximal surface, substantially spherical distal surface, and proximal tapered portion of the central tapered body comprise a porous material capable of allowing bone ingrowth into the proximal surface, substantially spherical distal surface, and proximal tapered portion of the central tapered body, such that the porous material is continuous from the substantially spherical distal surface to the proximal tapered portion of the central tapered body,
• wherein the proximal end portion is integral with the distal end tapered portion forming a main shaft, and the collar extends outward from the main shaft between the proximal end portion and the distal end tapered portion, and
• wherein the proximal tapered portion is a porous body disposed circumferentially around the main shaft distal to the circumferential collar.