- P. J. Insull, BHB MBChB, Orthopaedic Registrar1 ;
- H. Cobbett, BSc, MBChB, Orthopaedic Registrar2;
- C. M. Frampton, BSc, PhD, Associate Professor, Biostatistician3; and
- J. T. Munro, BHB, MBChB, FRACS, Orthopaedic Consultant, Senior Lecturer4
1Auckland City Hospital, Department of Orthopaedics, Park Road, Grafton, New Zealand.
2Northshore Hospital, Takapuna, Auckland, New Zealand.
3University of Otago, Christchurch, New Zealand.
4Auckland City Hospital, University of Auckland, Grafton, Auckland, New Zealand.
- Correspondence should be sent to Dr P. J. Insull; e-mail:email@example.com
We compared the rate of revision for instability after total hip replacement (THR) when lipped and non-lipped acetabular liners were used. We hypothesised that the use of a lipped liner in a modular uncemented acetabular component reduces the risk of revision for instability after primary THR. Using data from the New Zealand Joint Registry, we found that the use of a lipped liner was associated with a significantly decreased rate of revision for instability and for all other indications. Adjusting for the size of the femoral head, the surgical approach and the age and gender of the patient, this difference remained strongly significant (p < 0.001).
We conclude that evidence from the New Zealand registry suggests that the use of lipped liners with modular uncemented acetabular components is associated with a decreased rate of revision for instability after primary THR.
Cite this article: Bone Joint J 2014;96-B:884–8.
The authors would like to thank the New Zealand Joint Registry for their assistance in this study.
No benefits in any form have been received or will be received from a commercial party related directly or indirectly to the subject of this article.
This article was primary edited by D. J. Johnstone and first proof edited by J. Scott.
- Received December 13, 2013.
- Accepted April 4, 2014.