La fijación protésica de la hidroxiapatita

Abstract

We assessed the results alter 810 total hip arthroplasties with no cementation using an implant with hidroxyapatite coating in two different hospitals. The index procedure was indicated in primary hip osteoarthritis in 65.3% of the cases, and pain was the reason for operation in 83.2% of cases. Seven deep infections were recorded. Thigh pain was present in twenty-seven patients (3,3%), half of them during the immediate postoperative period associated with a collapse of femoral component (between 2 and 3 mm). Initial radiolucency areas were progressively filled and disappeared. This phenomenon has been interpreted as one of the beneficial features of hidroxypatite (osteoconduction); total disappearance occurs between the 8th and 10th weeks. These findings allow us to state the benefit of implant surface coating with hidroxiapatite, since it favours a better and earlier implant to bone fixation.