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Journal of Bone and Joint Surgery - British Volume, Vol 87-B, Issue 12, 1631-1635.
doi: 10.1302/0301-620X.87B12.16873  
Copyright © 2005 by British Editorial Society of Bone and Joint Surgery
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Total hip replacement with a zirconium oxide ceramic femoral head

A RANDOMISED ROENTGEN STEREOPHOTOGRAMMETRIC STUDY

T. von Schewelov, MD, Orthopaedic Surgeon1; L. Sanzén, MD, PhD, Orthopaedic Surgeon1; I. Önsten, MD, PhD, Orthopaedic Surgeon1; Å. Carlsson, MD, PhD, Orthopaedic Surgeon1; and J. Besjakov, MD, PhD, Radiologist2

1 Department of Orthopaedics
2 Department of Radiology Malmö University Hospital, 205 02 Malmö, Sweden.

Correspondence should be sent to Dr T. von Schewelov; e-mail: Thord.von_Schewelov{at}orto.mas.lu.se

We investigated the wear characteristics and clinical performance of four different total hip joint articulations in 114 patients. Wear and migration was measured by roentgenstereophotogrammetric analysis at five years or at the last follow-up. The mean annual wear was 0.11 mm for a stainless steel/Enduron articulation, 0.34 mm for stainless steel/Hylamer cup, 0.17 mm for zirconium oxide ceramic/Enduron and 0.40 mm for zirconium oxide ceramic/Hylamer. The difference between the groups was significant (p < 0.008) except for stainless steel/Hylamer vs zirconium oxide ceramic/Hylamer (p = 0.26).

At present, 12 patients have undergone a revision procedure, four at five years and eight thereafter. No patient who received a stainless steel/Enduron articulation at their primary replacement required revision.

Conflicting results have been reported about the performance of the zirconium oxide ceramic femoral head, but our findings suggest that it should not be used with a polymethylmethacrylate acetabular component. Hylamer has already been withdrawn from the market.






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