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Journal of Bone and Joint Surgery - British Volume, Vol 88-B, Issue 3, 315-320.
doi: 10.1302/0301-620X.88B3.17314  
Copyright © 2006 by British Editorial Society of Bone and Joint Surgery
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Five-year prospective clinical and radiological results of a new cannulated cemented polished Tri-Taper femoral stem

R. E. Field, PhD, FRCS(Orth), Consultant Orthopaedic Surgeon and Director of Orthopaedic Research1; P. J. Singh, MRCS, Specialist Orthopaedic Registrar2; A. M. H. Latif, MBBChir, Research Fellow3; M. D. Cronin, MRCS, Research Fellow3; and D. J. Matthews, MRCS, Research Fellow3

1 South West London Elective Orthopaedic Centre, Epsom General Hospital, Dorking Road, Epsom, Surrey KT18 7EG, UK.
2 Oxford Rotation, Nuffield Orthopaedic Centre, Windmill Road, Headington, Oxford OX3 7LD, UK.
3 Orthopaedic Research Unit, St Helier Hospital, Epsom and St Helier University Hospitals NHS Trust, Wrythe Lane, Carshalton, Surrey SM5 1AA, UK.

Correspondence should be sent to Mr R. E. Field; e-mail: richardefield{at}aol.com

We describe the results at five years of a prospective study of a new tri-tapered polished, cannulated, cemented femoral stem implanted in 51 patients (54 hips) with osteoarthritis. The mean age and body mass index of the patients was 74 years and 27.9, respectively. Using the anterolateral approach, half of the stems were implanted by a consultant orthopaedic surgeon and half by six different registrars. There were three withdrawals from the study because of psychiatric illness, a deep infection and a recurrent dislocation. Five deaths occurred prior to five-year follow-up and one patient withdrew from clinical review.

In the remaining 51 hips the mean pre-operative Oxford hip score was 47 points which decreased to 19 points at five years (45 hips). Of the stems 49 (98%) were implanted within 1° of neutral in the femoral canal. The mean migration of the stem at five years was 1.9 mm and the survivorship for aseptic loosening was 100%. There was no significant difference in outcome between the consultant and registrar groups. At five years, the results were comparable with those of other polished, tapered, cemented stems. Long-term surveillance continues.






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Hip, Knee, Trauma, Upper limb, Foot & Ankle, Paediatrics, Oncology, Spine, Arthroplasty, General