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KMID : 1028220150270040209
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Hip & Pelvis
2015 Volume.27 No. 4 p.209 ~ p.215
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The Results of Long-term Follow-up of Total Hip Arthroplasty Using Hydroxyapatite-coated Cups
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:Han Chang-Dong
:Shin Keun-Young/:Lee Hyun-Hee/:Park Kwan-Kyu/:Yang Ick-Hwan/:Lee Woo-Suk
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Abstract
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Purpose :The aim of this study was to report the long-term outcome and the failure mechanism of cementless total hip arthroplasty (THA) using hydroxyapatite (HA)-coated acetabular cup.
Materials and Methods : From January 1992 to May 1994, a total of 123 consecutive cementless primary THAs were performed using a HA-coated acetabular cup with metal-on-polyethylene articulation. We retrospectively evaluated 66 hips available for follow-up at a mean 18.3 years (range, 10.4-23.6 years). The survival analysis was performed by the Kaplan-Meier method. We defined end point as any failure that required a reoperation of acetabular component.
Results : Thirty-nine of 66 hips (59.1%) were defined as a failure for progressive acetabular osteolysis or aseptic loosening of the cup. Acetabular osteolysis was observed in 47 hips (71.2%) and 33 hips (50.0%) were revised because of cup loosening. The Kaplan-Meier method showed the survival rate of the acetabular cup to be 46.3% at 15 years and 34.8% at 20 years for any failure that required a reoperation of acetabular component.
Conclusion : The long-term survival rate of THA using HA-coated acetabular cup was unsatisfactory, and it was attributed to vulnerable property of HA coating and progressive osteolysis.
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KEYWORD
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Total hip arthroplasty, Hydroxyapatite-coated, Acetabular cup, Long-term outcome
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