Tantalum is a fairly new biomaterial designed with a high and bone-binding porosity. Tantalum has already proven to be a good prosthesis material facilitating fast bone-ingrowth and supplying mechanical qualities in the bone-prosthesis interface that surpasses the qualities of regular prosthesis materials by uncemented method. Titanium on the other hand has been used as a prosthesis coating for years and also promote prosthesis fixation by osteointegration.