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The Results of Long-term Follow-up of Total Hip Arthroplasty Using Hydroxyapatite-coated Cups

 Chang-Dong Han  ;  Keun-Young Shin  ;  Hyun-Hee Lee  ;  Kwan-Kyu Park  ;  Ick-Hwan Yang  ;  Woo-Suk Lee 
 Hip & Pelvis, Vol.27(4) : 209-215, 2015 
Journal Title
Hip & Pelvis
Issue Date
Acetabular cup ; Hydroxyapatite-coated ; Long-term outcome ; Total hip arthroplasty
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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1. College of Medicine (의과대학) > Dept. of Orthopedic Surgery (정형외과학교실) > 1. Journal Papers
Yonsei Authors
Park, Kwan Kyu(박관규) ORCID logo https://orcid.org/0000-0003-0514-3257
Shin, Keun-Young(신근영)
Yang, Ick Hwan(양익환)
Lee, Woo Suk(이우석) ORCID logo https://orcid.org/0000-0002-0798-1660
Lee, Hyun Hee(이현희)
Han, Chang Dong(한창동)
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