Revision of failed total hip prosthesis with insertion of hydroxyapatite-coated femoral component.

As the population ages, primary total hip arthroplasty (THA) is becoming one of the most common orthopedic procedures. Therefore, revisions for mechanical loosening after THA should also increase in future years. Loosening is a progressive phenomenon that, along with intracortical granuloma, causes bone destruction. The main concern in total hip revision surgery is the reduced bone stock, which makes it difficult to obtain optimal stability of the femoral stem (Case 1: Figs. 1 a, b).