Logo of The Journal of Bone & Joint Surgery (Br)
Quick search:        
          Advanced Search
Guest Access | Sign In
Journal of Bone and Joint Surgery - British Volume, Vol 88-B, Issue 7, 870-876.
doi: 10.1302/0301-620X.88B7.17644  
Copyright © 2006 by British Editorial Society of Bone and Joint Surgery
This Article
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow Submit a response
Right arrow Alert me when this article is cited
Right arrow Alert me when eLetters are posted
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in ISI Web of Science
Right arrow Alert me to new issues of the journal
Right arrow My Folders
Right arrow Download to citation manager
Citing Articles
Right arrow Citing Articles via ISI Web of Science (3)
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Khan, R. J. K.
Right arrow Articles by Wood, D.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Khan, R. J. K.
Right arrow Articles by Wood, D.

A constrained acetabular component for recurrent dislocation

R. J. K. Khan, FRCS (Trauma & Orth), Senior Lecturer1; D. Fick, MBBS, Orthopaedic Registrar2; R. Alakeson, FRCS, Lecturer in Orthopaedics1; S. Haebich, BSc, Senior Physiotherapist3; M. de Cruz, MBBS, Orthopaedic Registrar2; B. Nivbrant, PhD, Professor of Orthopaedics1; and D. Wood, MD, Professor of Orthopaedics1

1 University of Western Australia, Nedlands, Perth 6009, Western Australia.
2 Perth Orthopaedic Institute, Hollywood Private Hospital, Nedlands, Perth 6009, Western Australia.
3 Sir Charles Gairdner Hospital, Nedlands, Perth 6009, Western Australia.

Correspondence should be sent to Mr R. J. K. Khan at 1/14-16 Hamersley Street, Cottesloe, Western Australia 6011, Australia; e-mail: rjkkhan{at}gmail.com

We treated 34 patients with recurrent dislocation of the hip with a constrained acetabular component. Roentgen stereophotogrammetric analysis was performed to assess migration of the prosthesis.

The mean clinical follow-up was 3.0 years (2.2 to 4.8) and the radiological follow-up was 2.7 years (2.0 to 4.8). At the latest review six patients had died and none was lost to follow-up. There were four acetabular revisions, three for aseptic loosening and one for deep infection. Another acetabular component was radiologically loose with progressive radiolucent lines in all Gruen zones and was awaiting revision. The overall rate of aseptic loosening was 11.8% (4 of 34). Roentgen stereophotogrammetric analysis in the non-revised components confirmed migration of up to 1.06 mm of translation and 2.32° of rotation at 24 months. There was one case of dislocation and dissociation of the component in the same patient. Of the 34 patients, 33 (97.1%) had no further episodes of dislocation.

The constrained acetabular component reported in our study was effective in all but one patient with instability of the hip, but the rate of aseptic loosening was higher than has been reported previously and requires further investigation.






(c) British Editorial Society of Bone and Joint Surgery All Rights Reserved
Registered charity no: 209299     Print ISSN: 0301-620X
Hip, Knee, Trauma, Upper limb, Foot & Ankle, Paediatrics, Oncology, Spine, Arthroplasty, General