Eight-year results of hydroxyapatite-coated hip arthroplasty |
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Authors: | Chang Je-Ken Chen Chung-Hwan Huang Kuan-Yu Wang Gwo-Jaw |
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Institution: | Department of Orthopedics, Kaohsiung Medical University, Kaohsiung, Taiwan. |
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Abstract: | Ninety hips in 82 patients using Omnifit hydroxyapatite (HA)-coated prosthesis were followed for at least 7 years. All stems were stable at the final follow-up. However, aseptic loosening was found in 8 cups and 6 of them were revised. Two polyethylene wear were treated with inserts exchanged. The mechanical failure rate was 11.4% and the combined failure rate was 14.3% for HA-coated cup. Four other cups with wear and osteolysis without loosening or pain and 2 cups with polyethylene wear without osteolysis were still under observation. Our findings suggest that hip arthroplasties with HA coating on the smooth surface of a titanium cup is not reliable. The mid-term result of HA-coated stem is as good as that of porous-coated stem. |
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