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KMID : 0386720010130030243
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Journal of the Korean Hip Society
2001 Volume.13 No. 3 p.243 ~ p.252
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Minimum Five year Follow-up Study of Hydroxyapatite-Coated Primary Cementless Total Hip Replacement
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Hwang Sung-Kwan
Lee Doo-Hee
Lee Young-Wook
Song In-Kwon
Yang Sae-Hoon
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Abstract
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Objective: To assess the results of HA-coated proshesis for a minimum of five years.
Materials and Methods: We reviewed the radiographs of 73 patients(80 cases) who had been followed up for a minimum of five years after primary cementless total hip arthroplasty using the Omnifit system.
Results: Average Harris hip score was 45 points properatively, 97 points at 2 years after surgery, and 86 points at last follow-up, while hip pain was noted in 11 cases. Bone formation around the cup was noted in 55% of cases in zone Ⅰ, 11.3% in zone Ⅱ, and 27.5% in zone Ⅲ at last follow-up, while 61.3% were classified as stable with osseous ingrowth, 23.8% as stable with fibrous ingrowth, and 15% as unstable at last follow-up. Endosteal bone formation of femoral stem as noted in 63.8% of cases in Gruen zone 2, 48.8% in zone 3, 41.3% in zone 5, and 61.3% in zone 6 at last follow-up. Of the 80 cases of femoral stems, 72.5% were classified as stalbe with osseous ingrowth, 25% as stable with fibrous ingrowth, and 2.5% as unstable at last follow up.
Conclusion: Hip pain and the acetabular cup failure rate both increased over time whereas stem results were unchanged. Therefore, we conclude that acetabular reconstruction using only the HA-coated cup may be an unreliable indicator of long-term success.
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KEYWORD
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Omnifit, Hip, Arthroplasty, Hydroxyapatite, Omnifit
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