title: Eight-year results of hydroxyapatite-coated hip arthroplasty.
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.
authors.affiliation: Department of Orthopedics, Kaohsiung Medical University, Kaohsiung, Taiwan.
authors.forename: Je-Ken
authors.initials: JK
authors.lastname: Chang
authors.forename: Chung-Hwan
authors.initials: CH
authors.lastname: Chen
authors.forename: Kuan-Yu
authors.initials: KY
authors.lastname: Huang
authors.forename: Gwo-Jaw
authors.initials: GJ
authors.lastname: Wang
mesh_terms: D000328:Adult; D000368:Aged; D019644:Arthroplasty, Replacement, Hip / Q000295:instrumentation* / Q000401:mortality; D001843:Bone Cements; D020099:Coated Materials, Biocompatible; D017886:Durapatite; D005260:Female; D006622:Hip Prosthesis / Q000009:adverse effects; D006801:Humans; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications / Q000601:surgery; D011475:Prosthesis Failure; D012086:Reoperation / Q000706:statistics & numerical data; D012189:Retrospective Studies; D016019:Survival Analysis
chemical_list: D001843:Bone Cements; D020099:Coated Materials, Biocompatible; D017886:Durapatite