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Journal of Bone and Joint Surgery - British Volume, Vol 87-B, Issue 6, 776-780.
doi: 10.1302/0301-620X.87B6.15380  
Copyright © 2005 by British Editorial Society of Bone and Joint Surgery
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The use of cementless expansion acetabular component and an alumina-polyethylene bearing in total hip arthroplasty for osteonecrosis

Y.-G. Kim, MD, Fellow; S.-Y. Kim, MD, PhD, Professor; S.-J. Kim, MD, Fellow; B.-C. Park, MD, PhD, Professor; P.-T. Kim, MD, PhD, Professor; and J.-C. Ihn, MD, PhD, Professor

Department of Orthopaedic Surgery, Kyungpook National University School of Medicine, Sam-Duck 2 Ga, 50, Jung-Gu 700-721, Korea.

Correspondence should be sent to Professor S.-Y. Kim; e-mail: syukim{at}knu.ac.kr

We performed 114 consecutive primary total hip arthroplasties with a cementless expansion acetabular component in 101 patients for advanced osteonecrosis of the femoral head. The mean age of the patients at surgery was 51 years (36 to 62) and the mean length of follow-up was 110 months (84 to 129).

The mean pre-operative Harris hip score of 47 points improved to 93 points at final follow-up. The polyethylene liner was exchanged in two hips during this period and one broken acetabular component was revised. The mean linear wear rate of polyethylene was 0.07 mm/year and peri-acetabular osteolysis was seen in two hips (1.9%). Kaplan-Meier analysis indicated that the survival of the acetabular component without revision was 97.8% (95% confidence interval 0.956 to 1.000) at ten years.

Our study has shown that the results of THA with a cementless expansion acetabular component and an alumina-polyethylene bearing surface are good.






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Registered charity no: 209299     Print ISSN: 0301-620X
Hip, Knee, Trauma, Upper limb, Foot & Ankle, Paediatrics, Oncology, Spine, Arthroplasty, General