A titanium cementless calcar replacement prosthesis in revision surgery of the femur: 13-year experience

From January 1987 through December 2000, 1,179 cementless calcar prostheses were implanted at the Texas Center for Joint Replacement. The prosthesis is titanium, has proximal circumferential plasma-spray coating, and is designed for proximal bone loading. The average follow-up for the entire series was 6.2 years, and the projected stem survivorship at 13 years is 95.2%. There have been 9 stem revisions for loosening. When mechanical loosening alone is evaluated, the projected stem survivorship is 99%. There have been 56 revisions in the entire series. Prosthetic survivorship for the entire patient population is projected at 93.6% at 13 years. There have been no cases of distal lysis or late loosening. None of the prostheses are classified as loose at this time, and none are classified as stable fibrous fixation.