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Journal of Bone and Joint Surgery - British Volume, Vol 90-B, Issue 10, 1284-1290.
doi: 10.1302/0301-620X.90B10.20274  
Copyright © 2008 by British Editorial Society of Bone and Joint Surgery
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The results of the titanium-coated RM acetabular component at 20 years

A LONG-TERM FOLLOW-UP OF AN UNCEMENTED PRIMARY TOTAL HIP REPLACEMENT

M. Ihle, MD, Clinical Research Fellow1; S. Mai, MD, Orthopaedic Surgeon1; D. Pfluger, PhD, Biostatistician2; and W. Siebert, MD, Orthopaedic Surgeon, Medical Director1

1 Orthopädische Klinik Kassel, Wilhelmshöher Allee 345, D-34131 Kassel, Germany.
2 Datametrix AG, Technoparkstrasse 1, CH-8005 Zürich, Switzerland.

Correspondence should be sent to Dr W. Siebert; e-mail: wsiebert{at}okkassel.de

In a prospective study, 93 unselected consecutive uncemented hip arthroplasties were performed in 80 patients using the titanium-coated RM acetabular component and the CLS femoral component. The mean age of the patients at operation was 52 years (28 to 81). None were lost to follow-up. In the 23 patients who had died (26 hips) only one acetabular component had been revised. In the 57 living patients (67 hips), 13 such revisions had been performed. Of the 14 revisions, seven were for osteolysis, five for loosening and two for infection.

Survival analysis of this implant showed a total probability of survival of 83% (95% confidence interval 73 to 90), with all revisions as the endpoint, and a probability of 94% (95% confidence interval 87 to 98) with revision for aseptic loosening as the endpoint, indicating reliable long-term fixation of the titanium-coated RM acetabular component.




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