Hydroxyapatite-Coated Femoral Stem Survivorship at 10 Years
Section snippets
Materials and Methods
The first 103 hip arthroplasties implanted with the Omnifit-HA stem (Fig. 1) and Omnifit-PSL cup (Stryker, Mahwah, NJ) by one surgeon (CWC) in 96 patients between July 1991 and December 1993, were followed up. The criteria for selecting patients were advanced hip disease, physiological age less than 65 years, and anthropometric compatibility between the proximal femur and the stem. During the same period, patients with advanced hip disease and physiological age of more than 65 years underwent
Results
Ninety-six patients (103 hips) were selected for the study. Complete clinical follow-up was obtained for 81 patients including 46 patients (47 hips) older than 50 years at the time of surgery and 35 patients (38 hips) 50 years or younger. Three patients (3 hips) died, 4 patients (5 hips) were lost to follow-up, and 10 hips were revised during the course of the study. Of the 10 hips, 8 were revised at less than 10 years. The mean follow-up was 10.3 years (range, 7-12 years). Clinical outcomes
Discussion
Short-term follow-up of this hydroxyapatite-coated stem design has shown excellent clinical outcomes 5, 7, 13, 14. The longer-term follow-up of hydroxyapatite-coated stems has shown similar clinical and radiological results 6, 15, 16, 17, supporting the findings of early studies that hydroxyapatite is effective in rapid osseointegration and prevention of distal osteolysis by sealing the proximal femur against polyethylene debris distal migration. D'Antonio et al [6] reported excellent clinical
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The investigation of usage of fluorapatite mineral (Ca<inf>5</inf>F(PO<inf>4</inf>)<inf>3</inf>) in tooth enamel under the different pre-irradiation thermal treatments
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No benefits or funds were received in support of the study.