Prosthetic stem with strengthening rib

A prosthetic hip stem for implantation in a femur comprising:

• a neck connected to a shaft, said neck extending from a medial side of said hip stem, said neck and said shaft forming an obtuse angle;
• a porous substance protruding outwardly from a substrate of the prosthetic hip stem;
• and
• a first substantially nonporous protrusion protruding outwardly from said substrate and being substantially flush with said porous substance.

A prosthetic hip stem for implantation in a femur utilizing bone cement to form a mantle about a portion of the hip stem inserted into a canal in a femur, wherein the hip stem comprises:

• a neck connected to a shaft, said neck extending from a medial side of said hip stem, said neck and said shaft forming an obtuse angle;
• a transition section intermediate said neck and said shaft, said transition section having a transverse cross-sectional area larger than a transverse cross sectional area of said shaft;
• and
• a first protrusion protruding outwardly from an external surface of the prosthetic hip stem, said first protrusion having a height whereby said first protrusion is covered by the mantle.